Built 2026-10-15 (15 October 2026)

Spearfish Weather Records (USC00397882)

Record envelope, standing records and threshold days for Spearfish (USC00397882), South Dakota, United States, with 134 years of record.

Key Facts for Spearfish

  • Spearfish (USC00397882) is a weather station in South Dakota, United States at 44.50 latitude and -103.87 longitude, 1,107 m (3,633 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Spearfish still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Spearfish set a daily record high minimum temperature of 22.8 C (73.0 F) on 14 July 2026.

About the Station

  • Location: South Dakota, United States, 44.50 latitude, -103.87 longitude.
  • Elevation: 1,107 m (3,633 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

3 days at or beyond a record
Daily record high and record low at Spearfish, with 2026 drawn through them The band shows the record high and record low for each calendar day at Spearfish. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Spearfish. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Spearfish, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan26.1 C (79.0 F)-35.6 C (-32.1 F)14.4 C (57.9 F)-23.9 C (-11.0 F)
Feb23.9 C (75.0 F)-36.1 C (-33.0 F)17.8 C (64.0 F)-18.9 C (-2.0 F)
Mar27.8 C (82.0 F)-32.8 C (-27.0 F)26.1 C (79.0 F)-13.9 C (7.0 F)
Apr32.8 C (91.0 F)-22.2 C (-8.0 F)27.8 C (82.0 F)-5.0 C (23.0 F)
May35.6 C (96.1 F)-11.7 C (10.9 F)31.1 C (88.0 F)-1.7 C (28.9 F)
Jun40.6 C (105.1 F)-3.9 C (25.0 F)34.4 C (93.9 F)5.0 C (41.0 F)
Jul43.3 C (109.9 F)0.6 C (33.1 F)39.4 C (102.9 F)11.7 C (53.1 F)
Aug40.0 C (104.0 F)0.0 C (32.0 F)36.1 C (97.0 F)7.8 C (46.0 F)
Sep40.6 C (105.1 F)-9.4 C (15.1 F)34.4 C (93.9 F)5.6 C (42.1 F)
Oct35.0 C (95.0 F)-21.7 C (-7.1 F)28.3 C (82.9 F)5.6 C (42.1 F)
Nov29.4 C (84.9 F)-30.6 C (-23.1 F)n/an/a
Dec22.8 C (73.0 F)-34.4 C (-29.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Spearfish by the year they were set 1,464 records at Spearfish still stand. 1920 holds the most, with 50. 02040601893: 261894: 81895: 61896: 71897: 141898: 121899: 191900: 171901: 71902: 111903: 111904: 51905: 101906: 301907: 81908: 191909: 91910: 181911: 91912: 111913: 111914: 81915: 81916: 181917: 101918: 171919: 101920: 501921: 221922: 121923: 61924: 111925: 91926: 71927: 121928: 81929: 121930: 171931: 351932: 291933: 141934: 221935: 111936: 401937: 61938: 61939: 171940: 51941: 81942: 71943: 141944: 41945: 81946: 81947: 81948: 101949: 81950: 151951: 131952: 131953: 91954: 91955: 101956: 41957: 11958: 91959: 131960: 101961: 61962: 101963: 91964: 81965: 151966: 101967: 71968: 81969: 101971: 41972: 131973: 161974: 91975: 61976: 61977: 41978: 81979: 71980: 111981: 51982: 61983: 91984: 21985: 231986: 101987: 71988: 41989: 71990: 151991: 51992: 161993: 61994: 41995: 191996: 61997: 121998: 41999: 92000: 62001: 72002: 82003: 102004: 92005: 182006: 72007: 62008: 102009: 132010: 72011: 52012: 172013: 32014: 132015: 192016: 62017: 82018: 12019: 202020: 112021: 162022: 122023: 62024: 42025: 82026: 71893190719211935194919631978199220062020
1,464 records at Spearfish still stand. 1920 holds the most, with 50.
Standing records at Spearfish by the year they were set
Year setStanding records
189326
18948
18956
18967
189714
189812
189919
190017
19017
190211
190311
19045
190510
190630
19078
190819
19099
191018
19119
191211
191311
19148
19158
191618
191710
191817
191910
192050
192122
192212
19236
192411
19259
19267
192712
19288
192912
193017
193135
193229
193314
193422
193511
193640
19376
19386
193917
19405
19418
19427
194314
19444
19458
19468
19478
194810
19498
195015
195113
195213
19539
19549
195510
19564
19571
19589
195913
196010
19616
196210
19639
19648
196515
196610
19677
19688
196910
19714
197213
197316
19749
19756
19766
19774
19788
19797
198011
19815
19826
19839
19842
198523
198610
19877
19884
19897
199015
19915
199216
19936
19944
199519
19966
199712
19984
19999
20006
20017
20028
200310
20049
200518
20067
20076
200810
200913
20107
20115
201217
20133
201413
201519
20166
20178
20181
201920
202011
202116
202212
20236
20244
20258
20267

All-Time Record Progression

12 new records
When Spearfish set new all-time records 12 all-time records were set at Spearfish between 10 July 1930 and 14 February 2021. Each dot is a new record. Record high minimum temperatureRecord low minimum temperatureRecord high maximum temperatureRecord snow depthRecord low maximum temperature10 July 1930: Record high minimum temperature 27.8 C (82.0 F)27 June 1931: Record high minimum temperature 29.4 C (84.9 F)7 February 1933: Record low minimum temperature -35.6 C (-32.1 F)10 July 1933: Record high maximum temperature 41.7 C (107.1 F)25 June 1936: Record high minimum temperature 30.0 C (86.0 F)3 July 1936: Record high maximum temperature 42.2 C (108.0 F)6 July 1936: Record high maximum temperature 43.3 C (109.9 F)23 July 1936: Record high minimum temperature 31.1 C (88.0 F)30 March 1977: Record snow depth 91.4 cm (36.0 in)31 March 1977: Record snow depth 96.5 cm (38.0 in)20 December 1990: Record low maximum temperature -28.3 C (-18.9 F)14 February 2021: Record low minimum temperature -36.1 C (-33.0 F)193519501965198019952010
12 all-time records were set at Spearfish between 10 July 1930 and 14 February 2021. Each dot is a new record.
When Spearfish set new all-time records
DateKindDetail
1930-07-10Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
1931-06-27Record high minimum temperatureRecord high minimum temperature 29.4 C (84.9 F)
1933-02-07Record low minimum temperatureRecord low minimum temperature -35.6 C (-32.1 F)
1933-07-10Record high maximum temperatureRecord high maximum temperature 41.7 C (107.1 F)
1936-06-25Record high minimum temperatureRecord high minimum temperature 30.0 C (86.0 F)
1936-07-03Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
1936-07-06Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1936-07-23Record high minimum temperatureRecord high minimum temperature 31.1 C (88.0 F)
1977-03-30Record snow depthRecord snow depth 91.4 cm (36.0 in)
1977-03-31Record snow depthRecord snow depth 96.5 cm (38.0 in)
1990-12-20Record low maximum temperatureRecord low maximum temperature -28.3 C (-18.9 F)
2021-02-14Record low minimum temperatureRecord low minimum temperature -36.1 C (-33.0 F)

Wettest Day of Each Month

May: 164.8 mm (6.5 in)
Record daily precipitation for each month at Spearfish The wettest day on record for each calendar month at Spearfish. The most was 164.8 mm (6.5 in) on 11 May 1922. 050100150200 Jan: 38.1 mm (1.5 in), 16 January 1897 Jan Feb: 41.9 mm (1.6 in), 2 February 1924 Feb Mar: 96.5 mm (3.8 in), 27 March 1950 Mar Apr: 90.2 mm (3.6 in), 19 April 1903 Apr May: 164.8 mm (6.5 in), 11 May 1922 May Jun: 164.1 mm (6.5 in), 15 June 1976 Jun Jul: 87.6 mm (3.4 in), 29 July 1932 Jul Aug: 92.7 mm (3.6 in), 3 August 1922 Aug Sep: 76.2 mm (3.0 in), 28 September 1923 Sep Oct: 69.9 mm (2.8 in), 5 October 2013 Oct Nov: 72.1 mm (2.8 in), 1 November 2000 Nov Dec: 50.8 mm (2.0 in), 16 December 1921 Dec
The wettest day on record for each calendar month at Spearfish. The most was 164.8 mm (6.5 in) on 11 May 1922.
Record daily precipitation for each month at Spearfish
MonthRecord daily precipitation (mm)Date
Jan38.1 mm (1.5 in)16 January 1897
Feb41.9 mm (1.6 in)2 February 1924
Mar96.5 mm (3.8 in)27 March 1950
Apr90.2 mm (3.6 in)19 April 1903
May164.8 mm (6.5 in)11 May 1922
Jun164.1 mm (6.5 in)15 June 1976
Jul87.6 mm (3.4 in)29 July 1932
Aug92.7 mm (3.6 in)3 August 1922
Sep76.2 mm (3.0 in)28 September 1923
Oct69.9 mm (2.8 in)5 October 2013
Nov72.1 mm (2.8 in)1 November 2000
Dec50.8 mm (2.0 in)16 December 1921

Period of Record Coverage

1893 to 2026
Days with data per year at Spearfish 134 years of record at Spearfish, 1893 to 2026. 33 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1896, 1901, 1909, 1910, 1922, 1933 and others. 1893: 346 of 365 days1894: 317 of 365 days1895: 196 of 365 days1896: 86 of 366 days1897: 348 of 365 days1898: 348 of 365 days1899: 343 of 365 days1900: 347 of 365 days1901: 310 of 365 days1902: 330 of 365 days1903: 343 of 365 days1904: 358 of 366 days1905: 364 of 365 days1906: 359 of 365 days1907: 346 of 365 days1908: 354 of 366 days1909: 323 of 365 days1910: 289 of 365 days1911: 355 of 365 days1912: 363 of 366 days1913: 356 of 365 days1914: 362 of 365 days1915: 342 of 365 days1916: 355 of 366 days1917: 350 of 365 days1918: 356 of 365 days1919: 331 of 365 days1920: 363 of 366 days1921: 354 of 365 days1922: 328 of 365 days1923: 353 of 365 days1924: 365 of 366 days1925: 364 of 365 days1926: 362 of 365 days1927: 363 of 365 days1928: 334 of 366 days1929: 356 of 365 days1930: 361 of 365 days1931: 362 of 365 days1932: 361 of 366 days1933: 297 of 365 days1934: 275 of 365 days1935: 271 of 365 days1936: 315 of 366 days1937: 175 of 365 days1938: 362 of 365 days1939: 360 of 365 days1940: 365 of 366 days1941: 365 of 365 days1942: 363 of 365 days1943: 346 of 365 days1944: 366 of 366 days1945: 364 of 365 days1946: 341 of 365 days1947: 316 of 365 days1948: 275 of 366 days1949: 238 of 365 days1950: 359 of 365 days1951: 362 of 365 days1952: 352 of 366 days1953: 365 of 365 days1954: 364 of 365 days1955: 365 of 365 days1956: 274 of 366 days1957: 334 of 365 days1958: 351 of 365 days1959: 350 of 365 days1960: 366 of 366 days1961: 287 of 365 days1962: 331 of 365 days1963: 364 of 365 days1964: 353 of 366 days1965: 317 of 365 days1966: 350 of 365 days1967: 357 of 365 days1968: 361 of 366 days1969: 359 of 365 days1970: 360 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 365 of 365 days1974: 363 of 365 days1975: 363 of 365 days1976: 364 of 366 days1977: 362 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 365 of 366 days1981: 363 of 365 days1982: 352 of 365 days1983: 328 of 365 days1984: 266 of 366 days1985: 320 of 365 days1986: 346 of 365 days1987: 297 of 365 days1988: 277 of 366 days1989: 356 of 365 days1990: 362 of 365 days1991: 268 of 365 days1992: 325 of 366 days1993: 363 of 365 days1994: 363 of 365 days1995: 361 of 365 days1996: 365 of 366 days1997: 363 of 365 days1998: 256 of 365 days1999: 194 of 365 days2000: 296 of 366 days2001: 328 of 365 days2002: 303 of 365 days2003: 293 of 365 days2004: 305 of 366 days2005: 348 of 365 days2006: 349 of 365 days2007: 362 of 365 days2008: 353 of 366 days2009: 363 of 365 days2010: 354 of 365 days2011: 343 of 365 days2012: 361 of 366 days2013: 360 of 365 days2014: 362 of 365 days2015: 363 of 365 days2016: 355 of 366 days2017: 340 of 365 days2018: 352 of 365 days2019: 365 of 365 days2020: 364 of 366 days2021: 364 of 365 days2022: 364 of 365 days2023: 364 of 365 days2024: 366 of 366 days2025: 363 of 365 days2026: 279 of 365 days1900192019401960198020002020
134 years of record at Spearfish, 1893 to 2026. 33 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1896, 1901, 1909, 1910, 1922, 1933 and others.
Days with data per year at Spearfish
YearDays with dataShare of yearComplete
189334695%Yes
189431787%No
189519654%No
18968623%No
189734895%Yes
189834895%Yes
189934394%Yes
190034795%Yes
190131085%No
190233090%Yes
190334394%Yes
190435898%Yes
1905364100%Yes
190635998%Yes
190734695%Yes
190835497%Yes
190932388%No
191028979%No
191135597%Yes
191236399%Yes
191335698%Yes
191436299%Yes
191534294%Yes
191635597%Yes
191735096%Yes
191835698%Yes
191933191%Yes
192036399%Yes
192135497%Yes
192232890%No
192335397%Yes
1924365100%Yes
1925364100%Yes
192636299%Yes
192736399%Yes
192833491%Yes
192935698%Yes
193036199%Yes
193136299%Yes
193236199%Yes
193329781%No
193427575%No
193527174%No
193631586%No
193717548%No
193836299%Yes
193936099%Yes
1940365100%Yes
1941365100%Yes
194236399%Yes
194334695%Yes
1944366100%Yes
1945364100%Yes
194634193%Yes
194731687%No
194827575%No
194923865%No
195035998%Yes
195136299%Yes
195235296%Yes
1953365100%Yes
1954364100%Yes
1955365100%Yes
195627475%No
195733492%Yes
195835196%Yes
195935096%Yes
1960366100%Yes
196128779%No
196233191%Yes
1963364100%Yes
196435396%Yes
196531787%No
196635096%Yes
196735798%Yes
196836199%Yes
196935998%Yes
197036099%Yes
1971365100%Yes
197236499%Yes
1973365100%Yes
197436399%Yes
197536399%Yes
197636499%Yes
197736299%Yes
1978365100%Yes
1979364100%Yes
1980365100%Yes
198136399%Yes
198235296%Yes
198332890%No
198426673%No
198532088%No
198634695%Yes
198729781%No
198827776%No
198935698%Yes
199036299%Yes
199126873%No
199232589%No
199336399%Yes
199436399%Yes
199536199%Yes
1996365100%Yes
199736399%Yes
199825670%No
199919453%No
200029681%No
200132890%No
200230383%No
200329380%No
200430583%No
200534895%Yes
200634996%Yes
200736299%Yes
200835396%Yes
200936399%Yes
201035497%Yes
201134394%Yes
201236199%Yes
201336099%Yes
201436299%Yes
201536399%Yes
201635597%Yes
201734093%Yes
201835296%Yes
2019365100%Yes
202036499%Yes
2021364100%Yes
2022364100%Yes
2023364100%Yes
2024366100%Yes
202536399%Yes
202627976%No

Latest Records

20
Latest records at Spearfish
DateStationRecordValueBeat old record byOld record stoodSignificance
14 July 2026Spearfish, USdaily high min22.8 C (73.0 F)0.6 C (1.1 F)124 years41 of 100 (Notable)
13 July 2026Spearfish, USdaily high min23.9 C (75.0 F)1.1 C (2.0 F)20 years19 of 100 (Routine)
13 July 2026Spearfish, USdaily high max39.4 C (102.9 F)1.1 C (2.0 F)23 years18 of 100 (Routine)
17 April 2026Spearfish, USdaily snowfall13.2 cm (5.2 in)1.8 cm (0.7 in)105 years42 of 100 (Notable)
21 March 2026Spearfish, USdaily high max26.1 C (79.0 F)0.5 C (0.9 F)116 years40 of 100 (Notable)
20 March 2026Spearfish, USdaily high min8.9 C (48.0 F)0.6 C (1.1 F)108 years40 of 100 (Notable)
15 March 2026Spearfish, USdaily snowfall25.9 cm (10.2 in)5.6 cm (2.2 in)127 years45 of 100 (Notable)
9 March 2026Spearfish, USdaily high max20.6 C (69.1 F)1.7 C (3.1 F)5 years13 of 100 (Routine)
13 January 2026Spearfish, USdaily high min7.8 C (46.0 F)3.4 C (6.1 F)125 years43 of 100 (Notable)
26 December 2025Spearfish, USdaily high max18.3 C (64.9 F)2.2 C (4.0 F)79 years35 of 100 (Notable)
25 December 2025Spearfish, USdaily high min (Tie)6.7 C (44.1 F)tie96 years9 of 100 (Routine)
16 October 2025Spearfish, USdaily rain25.1 mm (1.0 in)3.8 mm (0.15 in)35 years23 of 100 (Routine)
20 August 2025Spearfish, USdaily high min22.8 C (73.0 F)1.1 C (2.0 F)83 years36 of 100 (Notable)
19 August 2025Spearfish, USdaily high min (Tie)20.0 C (68.0 F)tie48 years6 of 100 (Routine)
17 July 2025Spearfish, USdaily low max13.3 C (55.9 F)2.8 C (5.0 F)110 years46 of 100 (Notable)
20 May 2025Spearfish, USdaily low max4.4 C (39.9 F)1.2 C (2.2 F)6 years12 of 100 (Routine)
12 May 2025Spearfish, USdaily high min19.4 C (66.9 F)2.7 C (4.9 F)67 years35 of 100 (Notable)
10 May 2025Spearfish, USdaily high min16.1 C (61.0 F)0.5 C (0.9 F)124 years41 of 100 (Notable)
29 April 2025Spearfish, USdaily rain33.3 mm (1.3 in)6.1 mm (0.24 in)47 years30 of 100 (Routine)
28 March 2025Spearfish, USdaily high max25.0 C (77.0 F)0.6 C (1.1 F)62 years28 of 100 (Routine)

Climate Trend

97 complete years, 1893 to 2025
Annual mean temperature at Spearfish as warming stripes, 1893 to 2025 One stripe for each of 97 complete years at Spearfish, 1893 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1951, at 5.9 C (42.5 F), and the warmest was 1931, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.9 C (5.2 F). 1893: 7.9 C, -0.5 C from the station mean1897: 8.2 C, -0.2 C from the station mean1898: 7.4 C, -0.9 C from the station mean1899: 6.4 C, -2.0 C from the station mean1900: 9.4 C, +1.0 C from the station mean1901: 9.0 C, +0.6 C from the station mean1902: 7.8 C, -0.6 C from the station mean1903: 7.4 C, -1.0 C from the station mean1904: 8.1 C, -0.3 C from the station mean1905: 7.5 C, -0.9 C from the station mean1906: 8.0 C, -0.4 C from the station mean1907: 7.5 C, -0.9 C from the station mean1908: 9.1 C, +0.7 C from the station mean1911: 8.6 C, +0.2 C from the station mean1912: 6.7 C, -1.7 C from the station mean1913: 7.7 C, -0.7 C from the station mean1914: 8.9 C, +0.5 C from the station mean1915: 7.0 C, -1.4 C from the station mean1916: 6.6 C, -1.8 C from the station mean1917: 7.3 C, -1.1 C from the station mean1918: 8.4 C, 0.0 C from the station mean1920: 6.3 C, -2.1 C from the station mean1921: 10.1 C, +1.7 C from the station mean1924: 7.2 C, -1.1 C from the station mean1925: 9.1 C, +0.7 C from the station mean1926: 8.9 C, +0.5 C from the station mean1927: 7.2 C, -1.2 C from the station mean1929: 7.1 C, -1.3 C from the station mean1930: 9.2 C, +0.9 C from the station mean1931: 11.3 C, +2.9 C from the station mean1932: 8.6 C, +0.2 C from the station mean1938: 9.3 C, +0.9 C from the station mean1939: 9.6 C, +1.2 C from the station mean1940: 8.5 C, +0.1 C from the station mean1941: 8.9 C, +0.6 C from the station mean1942: 7.9 C, -0.5 C from the station mean1943: 7.8 C, -0.6 C from the station mean1944: 6.8 C, -1.6 C from the station mean1945: 7.0 C, -1.4 C from the station mean1950: 6.6 C, -1.8 C from the station mean1951: 5.9 C, -2.5 C from the station mean1952: 9.1 C, +0.7 C from the station mean1953: 10.0 C, +1.6 C from the station mean1954: 9.6 C, +1.2 C from the station mean1955: 8.2 C, -0.2 C from the station mean1959: 8.5 C, +0.1 C from the station mean1960: 8.1 C, -0.3 C from the station mean1963: 9.6 C, +1.2 C from the station mean1966: 7.8 C, -0.6 C from the station mean1967: 8.3 C, -0.1 C from the station mean1968: 7.9 C, -0.5 C from the station mean1969: 7.6 C, -0.8 C from the station mean1970: 7.6 C, -0.8 C from the station mean1971: 7.3 C, -1.1 C from the station mean1972: 7.0 C, -1.4 C from the station mean1973: 8.2 C, -0.2 C from the station mean1974: 8.7 C, +0.3 C from the station mean1975: 7.5 C, -0.9 C from the station mean1976: 8.9 C, +0.5 C from the station mean1977: 8.7 C, +0.3 C from the station mean1978: 6.8 C, -1.6 C from the station mean1979: 7.2 C, -1.2 C from the station mean1980: 8.4 C, 0.0 C from the station mean1981: 8.8 C, +0.4 C from the station mean1982: 6.9 C, -1.4 C from the station mean1986: 8.9 C, +0.5 C from the station mean1989: 8.1 C, -0.2 C from the station mean1990: 9.1 C, +0.7 C from the station mean1993: 7.0 C, -1.4 C from the station mean1994: 9.1 C, +0.7 C from the station mean1995: 8.5 C, +0.1 C from the station mean1996: 6.7 C, -1.7 C from the station mean1997: 8.4 C, 0.0 C from the station mean2001: 9.5 C, +1.2 C from the station mean2002: 9.3 C, +0.9 C from the station mean2003: 9.7 C, +1.4 C from the station mean2004: 10.3 C, +1.9 C from the station mean2005: 10.5 C, +2.1 C from the station mean2006: 10.8 C, +2.4 C from the station mean2007: 10.3 C, +1.9 C from the station mean2008: 8.9 C, +0.5 C from the station mean2009: 9.3 C, +0.9 C from the station mean2010: 9.7 C, +1.3 C from the station mean2011: 9.1 C, +0.7 C from the station mean2012: 10.9 C, +2.6 C from the station mean2013: 8.5 C, +0.1 C from the station mean2014: 7.7 C, -0.7 C from the station mean2015: 10.1 C, +1.7 C from the station mean2016: 10.6 C, +2.2 C from the station mean2017: 9.2 C, +0.8 C from the station mean2019: 6.1 C, -2.3 C from the station mean2020: 8.5 C, +0.1 C from the station mean2021: 9.0 C, +0.6 C from the station mean2022: 8.1 C, -0.2 C from the station mean2023: 9.1 C, +0.7 C from the station mean2024: 9.2 C, +0.8 C from the station mean2025: 8.5 C, +0.1 C from the station mean18931900191019201930194019501960197019801990200020102020
One stripe for each of 97 complete years at Spearfish, 1893 to 2025. Blue stripes are years cooler than the station's own mean of 8.4 C (47.1 F); red stripes are warmer. The coolest year was 1951, at 5.9 C (42.5 F), and the warmest was 1931, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Spearfish as warming stripes, 1893 to 2025
YearAnnual mean temperatureDifference from the station mean
18937.9 C-0.53 C
18978.2 C-0.16 C
18987.4 C-0.95 C
18996.4 C-2.02 C
19009.4 C+1.02 C
19019.0 C+0.62 C
19027.8 C-0.56 C
19037.4 C-0.97 C
19048.1 C-0.27 C
19057.5 C-0.86 C
19068.0 C-0.41 C
19077.5 C-0.89 C
19089.1 C+0.69 C
19118.6 C+0.19 C
19126.7 C-1.73 C
19137.7 C-0.69 C
19148.9 C+0.47 C
19157.0 C-1.37 C
19166.6 C-1.78 C
19177.3 C-1.11 C
19188.4 C-0.01 C
19206.3 C-2.11 C
192110.1 C+1.71 C
19247.2 C-1.15 C
19259.1 C+0.73 C
19268.9 C+0.46 C
19277.2 C-1.24 C
19297.1 C-1.33 C
19309.2 C+0.85 C
193111.3 C+2.88 C
19328.6 C+0.23 C
19389.3 C+0.86 C
19399.6 C+1.18 C
19408.5 C+0.07 C
19418.9 C+0.55 C
19427.9 C-0.51 C
19437.8 C-0.60 C
19446.8 C-1.56 C
19457.0 C-1.41 C
19506.6 C-1.79 C
19515.9 C-2.53 C
19529.1 C+0.67 C
195310.0 C+1.56 C
19549.6 C+1.21 C
19558.2 C-0.21 C
19598.5 C+0.13 C
19608.1 C-0.26 C
19639.6 C+1.22 C
19667.8 C-0.57 C
19678.3 C-0.10 C
19687.9 C-0.49 C
19697.6 C-0.83 C
19707.6 C-0.84 C
19717.3 C-1.14 C
19727.0 C-1.36 C
19738.2 C-0.23 C
19748.7 C+0.34 C
19757.5 C-0.91 C
19768.9 C+0.49 C
19778.7 C+0.33 C
19786.8 C-1.59 C
19797.2 C-1.17 C
19808.4 C+0.00 C
19818.8 C+0.44 C
19826.9 C-1.45 C
19868.9 C+0.49 C
19898.1 C-0.25 C
19909.1 C+0.74 C
19937.0 C-1.39 C
19949.1 C+0.73 C
19958.5 C+0.14 C
19966.7 C-1.74 C
19978.4 C+0.03 C
20019.5 C+1.15 C
20029.3 C+0.90 C
20039.7 C+1.35 C
200410.3 C+1.86 C
200510.5 C+2.11 C
200610.8 C+2.38 C
200710.3 C+1.94 C
20088.9 C+0.53 C
20099.3 C+0.91 C
20109.7 C+1.31 C
20119.1 C+0.68 C
201210.9 C+2.55 C
20138.5 C+0.12 C
20147.7 C-0.70 C
201510.1 C+1.72 C
201610.6 C+2.22 C
20179.2 C+0.76 C
20196.1 C-2.26 C
20208.5 C+0.14 C
20219.0 C+0.64 C
20228.1 C-0.25 C
20239.1 C+0.71 C
20249.2 C+0.76 C
20258.5 C+0.14 C

The annual mean temperature here has risen by 0.10 C (0.04 to 0.15) per decade over 1893 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 97 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Spearfish
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.10 C (0.04 to 0.15) per decade0.2 F (0.1 to 0.3) per decade1893 to 202597Rise
Mean daily maximum0.08 C (0.01 to 0.14) per decade0.14 F (0.02 to 0.25) per decade1893 to 202597Rise
Mean daily minimum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1893 to 202597Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1893 to 2026
Yearly extremes at Spearfish: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)193637.8 C (100.0 F)134
Coldest night (TNn)-36.1 C (-33.0 F)2021-28.3 C (-18.9 F)134
Wettest day (Rx1day)164.8 mm (6.5 in)192245.5 mm (1.8 in)134
Wettest five days (Rx5day)255.3 mm (10.1 in)197666.3 mm (2.6 in)134
Longest dry spell (CDD)71 days189727 days134

Hottest day (TXx)

Hottest day (TXx) at Spearfish by year The hottest day of the year at Spearfish, 1893 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 37.8 C (100.0 F). 2025303540451900192019401960198020002020Record: 43.3 C (109.9 F) in 1936
The hottest day of the year at Spearfish, 1893 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Spearfish by year
YearHottest day (TXx)
189340.6 C (105.1 F)
189437.2 C (99.0 F)
189534.4 C (93.9 F)
189624.4 C (75.9 F)
189735.6 C (96.1 F)
189836.1 C (97.0 F)
189936.7 C (98.1 F)
190040.0 C (104.0 F)
190138.3 C (100.9 F)
190238.3 C (100.9 F)
190335.0 C (95.0 F)
190433.9 C (93.0 F)
190534.4 C (93.9 F)
190638.3 C (100.9 F)
190733.9 C (93.0 F)
190838.3 C (100.9 F)
190937.2 C (99.0 F)
191036.7 C (98.1 F)
191136.1 C (97.0 F)
191234.4 C (93.9 F)
191336.1 C (97.0 F)
191436.7 C (98.1 F)
191535.0 C (95.0 F)
191637.2 C (99.0 F)
191738.9 C (102.0 F)
191836.7 C (98.1 F)
191938.3 C (100.9 F)
192036.7 C (98.1 F)
192136.7 C (98.1 F)
192234.4 C (93.9 F)
192335.0 C (95.0 F)
192437.2 C (99.0 F)
192536.7 C (98.1 F)
192638.9 C (102.0 F)
192734.4 C (93.9 F)
192836.7 C (98.1 F)
192938.9 C (102.0 F)
193040.0 C (104.0 F)
193140.6 C (105.1 F)
193235.0 C (95.0 F)
193341.7 C (107.1 F)
193440.0 C (104.0 F)
193539.4 C (102.9 F)
193643.3 C (109.9 F)
193738.9 C (102.0 F)
193840.0 C (104.0 F)
193940.6 C (105.1 F)
194039.4 C (102.9 F)
194140.0 C (104.0 F)
194236.1 C (97.0 F)
194337.2 C (99.0 F)
194436.7 C (98.1 F)
194537.2 C (99.0 F)
194637.8 C (100.0 F)
194739.4 C (102.9 F)
194838.9 C (102.0 F)
194938.9 C (102.0 F)
195037.2 C (99.0 F)
195137.8 C (100.0 F)
195239.4 C (102.9 F)
195336.1 C (97.0 F)
195441.1 C (106.0 F)
195536.7 C (98.1 F)
195635.0 C (95.0 F)
195738.3 C (100.9 F)
195838.9 C (102.0 F)
195938.9 C (102.0 F)
196040.0 C (104.0 F)
196138.3 C (100.9 F)
196235.0 C (95.0 F)
196336.1 C (97.0 F)
196438.3 C (100.9 F)
196537.2 C (99.0 F)
196637.8 C (100.0 F)
196735.0 C (95.0 F)
196834.4 C (93.9 F)
196938.9 C (102.0 F)
197035.6 C (96.1 F)
197136.7 C (98.1 F)
197235.0 C (95.0 F)
197340.6 C (105.1 F)
197437.8 C (100.0 F)
197540.0 C (104.0 F)
197637.8 C (100.0 F)
197738.9 C (102.0 F)
197840.6 C (105.1 F)
197938.3 C (100.9 F)
198040.0 C (104.0 F)
198140.0 C (104.0 F)
198236.7 C (98.1 F)
198339.4 C (102.9 F)
198436.7 C (98.1 F)
198538.3 C (100.9 F)
198637.8 C (100.0 F)
198740.6 C (105.1 F)
198839.4 C (102.9 F)
198940.6 C (105.1 F)
199040.0 C (104.0 F)
199141.1 C (106.0 F)
199237.2 C (99.0 F)
199333.9 C (93.0 F)
199437.2 C (99.0 F)
199539.4 C (102.9 F)
199637.2 C (99.0 F)
199737.2 C (99.0 F)
199837.8 C (100.0 F)
199937.2 C (99.0 F)
200039.4 C (102.9 F)
200140.0 C (104.0 F)
200240.0 C (104.0 F)
200338.3 C (100.9 F)
200439.4 C (102.9 F)
200540.6 C (105.1 F)
200642.8 C (109.0 F)
200738.9 C (102.0 F)
200836.7 C (98.1 F)
200935.0 C (95.0 F)
201038.9 C (102.0 F)
201137.2 C (99.0 F)
201239.4 C (102.9 F)
201337.8 C (100.0 F)
201435.6 C (96.1 F)
201536.1 C (97.0 F)
201639.4 C (102.9 F)
201737.2 C (99.0 F)
201837.2 C (99.0 F)
201931.7 C (89.1 F)
202033.3 C (91.9 F)
202138.3 C (100.9 F)
202237.8 C (100.0 F)
202336.1 C (97.0 F)
202437.8 C (100.0 F)
202536.1 C (97.0 F)
202639.4 C (102.9 F)

Coldest night (TNn)

Coldest night (TNn) at Spearfish by year The coldest night of the year at Spearfish, 1893 to 2026. The record is -36.1 C (-33.0 F) in 2021, marked on the chart; the median year is -28.3 C (-18.9 F). -40-30-20-101900192019401960198020002020Record: -36.1 C (-33.0 F) in 2021
The coldest night of the year at Spearfish, 1893 to 2026. The record is -36.1 C (-33.0 F) in 2021, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Spearfish by year
YearColdest night (TNn)
1893-34.4 C (-29.9 F)
1894-26.1 C (-15.0 F)
1895-28.9 C (-20.0 F)
1896-23.9 C (-11.0 F)
1897-27.8 C (-18.0 F)
1898-23.9 C (-11.0 F)
1899-33.9 C (-29.0 F)
1900-28.9 C (-20.0 F)
1901-27.2 C (-17.0 F)
1902-29.4 C (-20.9 F)
1903-26.1 C (-15.0 F)
1904-28.3 C (-18.9 F)
1905-32.8 C (-27.0 F)
1906-26.1 C (-15.0 F)
1907-30.6 C (-23.1 F)
1908-20.0 C (-4.0 F)
1909-28.9 C (-20.0 F)
1910-29.4 C (-20.9 F)
1911-30.6 C (-23.1 F)
1912-31.1 C (-24.0 F)
1913-28.9 C (-20.0 F)
1914-32.8 C (-27.0 F)
1915-31.7 C (-25.1 F)
1916-35.0 C (-31.0 F)
1917-33.3 C (-27.9 F)
1918-34.4 C (-29.9 F)
1919-30.6 C (-23.1 F)
1920-31.7 C (-25.1 F)
1921-23.9 C (-11.0 F)
1922-29.4 C (-20.9 F)
1923-31.7 C (-25.1 F)
1924-33.3 C (-27.9 F)
1925-28.9 C (-20.0 F)
1926-28.9 C (-20.0 F)
1927-29.4 C (-20.9 F)
1928-30.0 C (-22.0 F)
1929-32.2 C (-26.0 F)
1930-32.8 C (-27.0 F)
1931-24.4 C (-11.9 F)
1932-31.7 C (-25.1 F)
1933-35.6 C (-32.1 F)
1934-18.3 C (-0.9 F)
1935-22.2 C (-8.0 F)
1936-35.6 C (-32.1 F)
1937-26.7 C (-16.1 F)
1938-27.8 C (-18.0 F)
1939-33.3 C (-27.9 F)
1940-28.9 C (-20.0 F)
1941-22.8 C (-9.0 F)
1942-28.9 C (-20.0 F)
1943-34.4 C (-29.9 F)
1944-27.2 C (-17.0 F)
1945-28.3 C (-18.9 F)
1946-27.2 C (-17.0 F)
1947-25.6 C (-14.1 F)
1948-27.8 C (-18.0 F)
1949-32.2 C (-26.0 F)
1950-35.6 C (-32.1 F)
1951-30.6 C (-23.1 F)
1952-31.1 C (-24.0 F)
1953-23.3 C (-9.9 F)
1954-30.0 C (-22.0 F)
1955-26.7 C (-16.1 F)
1956-28.3 C (-18.9 F)
1957-26.1 C (-15.0 F)
1958-23.9 C (-11.0 F)
1959-30.6 C (-23.1 F)
1960-27.2 C (-17.0 F)
1961-21.7 C (-7.1 F)
1962-28.9 C (-20.0 F)
1963-28.3 C (-18.9 F)
1964-30.6 C (-23.1 F)
1965-27.2 C (-17.0 F)
1966-30.6 C (-23.1 F)
1967-30.6 C (-23.1 F)
1968-34.4 C (-29.9 F)
1969-27.8 C (-18.0 F)
1970-26.7 C (-16.1 F)
1971-27.8 C (-18.0 F)
1972-30.6 C (-23.1 F)
1973-27.2 C (-17.0 F)
1974-27.2 C (-17.0 F)
1975-25.0 C (-13.0 F)
1976-28.3 C (-18.9 F)
1977-31.7 C (-25.1 F)
1978-31.1 C (-24.0 F)
1979-28.9 C (-20.0 F)
1980-27.8 C (-18.0 F)
1981-26.1 C (-15.0 F)
1982-31.1 C (-24.0 F)
1983-33.3 C (-27.9 F)
1984-28.9 C (-20.0 F)
1985-34.4 C (-29.9 F)
1986-26.7 C (-16.1 F)
1987-17.2 C (1.0 F)
1988-23.9 C (-11.0 F)
1989-31.7 C (-25.1 F)
1990-31.7 C (-25.1 F)
1991-23.3 C (-9.9 F)
1992-25.0 C (-13.0 F)
1993-26.1 C (-15.0 F)
1994-30.0 C (-22.0 F)
1995-24.4 C (-11.9 F)
1996-31.7 C (-25.1 F)
1997-27.8 C (-18.0 F)
1998-26.7 C (-16.1 F)
1999-12.2 C (10.0 F)
2000-23.9 C (-11.0 F)
2001-22.8 C (-9.0 F)
2002-21.7 C (-7.1 F)
2003-22.8 C (-9.0 F)
2004-24.4 C (-11.9 F)
2005-23.9 C (-11.0 F)
2006-26.7 C (-16.1 F)
2007-25.0 C (-13.0 F)
2008-26.7 C (-16.1 F)
2009-23.3 C (-9.9 F)
2010-22.2 C (-8.0 F)
2011-26.1 C (-15.0 F)
2012-21.7 C (-7.1 F)
2013-27.2 C (-17.0 F)
2014-27.8 C (-18.0 F)
2015-20.6 C (-5.1 F)
2016-26.7 C (-16.1 F)
2017-31.1 C (-24.0 F)
2018-30.0 C (-22.0 F)
2019-32.8 C (-27.0 F)
2020-26.1 C (-15.0 F)
2021-36.1 C (-33.0 F)
2022-33.9 C (-29.0 F)
2023-27.2 C (-17.0 F)
2024-33.3 C (-27.9 F)
2025-28.9 C (-20.0 F)
2026-23.9 C (-11.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Spearfish by year The wettest day of the year at Spearfish, 1893 to 2026. The record is 164.8 mm (6.5 in) in 1922, marked on the chart; the median year is 45.5 mm (1.8 in). 0501001502001900192019401960198020002020Record: 164.8 mm (6.5 in) in 1922
The wettest day of the year at Spearfish, 1893 to 2026. The record is 164.8 mm (6.5 in) in 1922, marked on the chart; the median year is 45.5 mm (1.8 in).
Wettest day (Rx1day) at Spearfish by year
YearWettest day (Rx1day)
189343.2 mm (1.7 in)
189461.0 mm (2.4 in)
189569.1 mm (2.7 in)
18967.6 mm (0.30 in)
189761.0 mm (2.4 in)
189843.2 mm (1.7 in)
189961.0 mm (2.4 in)
190057.9 mm (2.3 in)
190145.7 mm (1.8 in)
190258.4 mm (2.3 in)
190390.2 mm (3.6 in)
190463.5 mm (2.5 in)
1905114.3 mm (4.5 in)
190653.3 mm (2.1 in)
190783.1 mm (3.3 in)
190881.0 mm (3.2 in)
190939.4 mm (1.6 in)
191038.1 mm (1.5 in)
191127.9 mm (1.1 in)
191247.0 mm (1.9 in)
191370.6 mm (2.8 in)
191434.5 mm (1.4 in)
191536.1 mm (1.4 in)
191628.2 mm (1.1 in)
191718.0 mm (0.7 in)
191842.7 mm (1.7 in)
191940.6 mm (1.6 in)
192048.3 mm (1.9 in)
192150.8 mm (2.0 in)
1922164.8 mm (6.5 in)
192376.2 mm (3.0 in)
192467.3 mm (2.6 in)
192568.1 mm (2.7 in)
192666.5 mm (2.6 in)
192745.2 mm (1.8 in)
192839.4 mm (1.6 in)
192966.0 mm (2.6 in)
193030.7 mm (1.2 in)
193134.3 mm (1.4 in)
193287.6 mm (3.4 in)
193386.4 mm (3.4 in)
193436.6 mm (1.4 in)
193533.8 mm (1.3 in)
193644.7 mm (1.8 in)
193765.8 mm (2.6 in)
193830.0 mm (1.2 in)
193927.2 mm (1.1 in)
194039.1 mm (1.5 in)
194185.9 mm (3.4 in)
194240.9 mm (1.6 in)
194322.6 mm (0.9 in)
194467.8 mm (2.7 in)
194536.8 mm (1.4 in)
194689.2 mm (3.5 in)
194778.5 mm (3.1 in)
194870.6 mm (2.8 in)
194936.8 mm (1.4 in)
195096.5 mm (3.8 in)
195138.1 mm (1.5 in)
195238.1 mm (1.5 in)
195343.2 mm (1.7 in)
195440.1 mm (1.6 in)
195535.1 mm (1.4 in)
195658.4 mm (2.3 in)
195757.2 mm (2.3 in)
195842.2 mm (1.7 in)
195927.7 mm (1.1 in)
196025.9 mm (1.0 in)
196136.8 mm (1.4 in)
196250.0 mm (2.0 in)
196344.7 mm (1.8 in)
1964127.8 mm (5.0 in)
196530.5 mm (1.2 in)
196658.2 mm (2.3 in)
196754.6 mm (2.1 in)
196834.5 mm (1.4 in)
196931.8 mm (1.3 in)
197092.7 mm (3.6 in)
197173.7 mm (2.9 in)
197242.7 mm (1.7 in)
197354.6 mm (2.1 in)
197431.0 mm (1.2 in)
197526.9 mm (1.1 in)
1976164.1 mm (6.5 in)
197766.8 mm (2.6 in)
197833.0 mm (1.3 in)
197926.2 mm (1.0 in)
198031.2 mm (1.2 in)
198139.1 mm (1.5 in)
198289.2 mm (3.5 in)
198344.5 mm (1.8 in)
198468.6 mm (2.7 in)
198555.9 mm (2.2 in)
198650.3 mm (2.0 in)
198741.9 mm (1.6 in)
198850.8 mm (2.0 in)
198941.1 mm (1.6 in)
199053.3 mm (2.1 in)
199149.0 mm (1.9 in)
199240.6 mm (1.6 in)
199334.5 mm (1.4 in)
199460.2 mm (2.4 in)
199585.9 mm (3.4 in)
199643.9 mm (1.7 in)
199730.0 mm (1.2 in)
199858.2 mm (2.3 in)
199933.0 mm (1.3 in)
200072.1 mm (2.8 in)
200132.3 mm (1.3 in)
200249.3 mm (1.9 in)
200352.1 mm (2.1 in)
200437.1 mm (1.5 in)
200542.4 mm (1.7 in)
200655.9 mm (2.2 in)
200754.6 mm (2.1 in)
2008101.6 mm (4.0 in)
200930.5 mm (1.2 in)
201038.1 mm (1.5 in)
201150.8 mm (2.0 in)
201231.2 mm (1.2 in)
201369.9 mm (2.8 in)
201441.1 mm (1.6 in)
201555.9 mm (2.2 in)
201625.4 mm (1.0 in)
201748.8 mm (1.9 in)
201846.0 mm (1.8 in)
201939.1 mm (1.5 in)
202034.3 mm (1.4 in)
202164.3 mm (2.5 in)
202231.0 mm (1.2 in)
202375.7 mm (3.0 in)
202451.1 mm (2.0 in)
202535.1 mm (1.4 in)
202628.7 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Spearfish by year The wettest five days of the year at Spearfish, 1893 to 2026. The record is 255.3 mm (10.1 in) in 1976, marked on the chart; the median year is 66.3 mm (2.6 in). 01002003001900192019401960198020002020Record: 255.3 mm (10.1 in) in 1976
The wettest five days of the year at Spearfish, 1893 to 2026. The record is 255.3 mm (10.1 in) in 1976, marked on the chart; the median year is 66.3 mm (2.6 in).
Wettest five days (Rx5day) at Spearfish by year
YearWettest five days (Rx5day)
189358.5 mm (2.3 in)
189476.3 mm (3.0 in)
189556.3 mm (2.2 in)
18969.0 mm (0.35 in)
189794.0 mm (3.7 in)
189854.6 mm (2.1 in)
189966.1 mm (2.6 in)
190075.7 mm (3.0 in)
190177.8 mm (3.1 in)
190258.4 mm (2.3 in)
190390.2 mm (3.6 in)
1904141.0 mm (5.6 in)
1905114.3 mm (4.5 in)
1906110.5 mm (4.4 in)
1907169.6 mm (6.7 in)
190881.0 mm (3.2 in)
190996.6 mm (3.8 in)
191045.7 mm (1.8 in)
191135.3 mm (1.4 in)
191255.4 mm (2.2 in)
191375.7 mm (3.0 in)
191447.2 mm (1.9 in)
191571.6 mm (2.8 in)
191656.9 mm (2.2 in)
191727.9 mm (1.1 in)
191876.5 mm (3.0 in)
191968.6 mm (2.7 in)
192062.5 mm (2.5 in)
192160.5 mm (2.4 in)
1922184.1 mm (7.2 in)
1923112.0 mm (4.4 in)
192477.7 mm (3.1 in)
192581.1 mm (3.2 in)
192666.5 mm (2.6 in)
192767.3 mm (2.6 in)
192860.0 mm (2.4 in)
192991.0 mm (3.6 in)
193049.2 mm (1.9 in)
193134.3 mm (1.4 in)
1932112.3 mm (4.4 in)
1933104.0 mm (4.1 in)
193447.0 mm (1.9 in)
193544.8 mm (1.8 in)
193652.0 mm (2.0 in)
1937122.3 mm (4.8 in)
193847.8 mm (1.9 in)
193946.2 mm (1.8 in)
194054.1 mm (2.1 in)
1941170.8 mm (6.7 in)
1942100.8 mm (4.0 in)
194348.5 mm (1.9 in)
1944129.0 mm (5.1 in)
194565.3 mm (2.6 in)
1946146.8 mm (5.8 in)
1947172.7 mm (6.8 in)
194870.6 mm (2.8 in)
194937.6 mm (1.5 in)
1950105.4 mm (4.1 in)
195165.6 mm (2.6 in)
195271.1 mm (2.8 in)
195385.1 mm (3.4 in)
195458.2 mm (2.3 in)
195550.8 mm (2.0 in)
195676.2 mm (3.0 in)
195772.7 mm (2.9 in)
195857.4 mm (2.3 in)
195933.8 mm (1.3 in)
196042.9 mm (1.7 in)
196157.4 mm (2.3 in)
1962138.4 mm (5.4 in)
196370.8 mm (2.8 in)
1964201.0 mm (7.9 in)
196544.5 mm (1.8 in)
196664.5 mm (2.5 in)
196779.5 mm (3.1 in)
196870.3 mm (2.8 in)
196960.9 mm (2.4 in)
1970103.4 mm (4.1 in)
197183.4 mm (3.3 in)
197291.0 mm (3.6 in)
197376.0 mm (3.0 in)
197451.8 mm (2.0 in)
197537.7 mm (1.5 in)
1976255.3 mm (10.1 in)
197796.0 mm (3.8 in)
197888.3 mm (3.5 in)
197951.6 mm (2.0 in)
198051.3 mm (2.0 in)
198152.0 mm (2.0 in)
1982201.9 mm (7.9 in)
198364.1 mm (2.5 in)
1984121.9 mm (4.8 in)
198564.3 mm (2.5 in)
198664.4 mm (2.5 in)
198765.9 mm (2.6 in)
198854.6 mm (2.1 in)
198960.8 mm (2.4 in)
199079.0 mm (3.1 in)
199153.3 mm (2.1 in)
199247.4 mm (1.9 in)
199367.3 mm (2.6 in)
199486.6 mm (3.4 in)
1995130.6 mm (5.1 in)
199685.9 mm (3.4 in)
199749.6 mm (2.0 in)
199891.4 mm (3.6 in)
199978.7 mm (3.1 in)
200090.1 mm (3.5 in)
200161.7 mm (2.4 in)
200253.6 mm (2.1 in)
200365.3 mm (2.6 in)
200454.3 mm (2.1 in)
200566.1 mm (2.6 in)
2006106.7 mm (4.2 in)
200798.0 mm (3.9 in)
2008157.0 mm (6.2 in)
200970.1 mm (2.8 in)
201062.4 mm (2.5 in)
201164.0 mm (2.5 in)
201234.2 mm (1.3 in)
2013123.9 mm (4.9 in)
201463.0 mm (2.5 in)
201566.1 mm (2.6 in)
201630.4 mm (1.2 in)
201760.5 mm (2.4 in)
2018101.2 mm (4.0 in)
201993.5 mm (3.7 in)
202036.3 mm (1.4 in)
202171.4 mm (2.8 in)
202258.7 mm (2.3 in)
2023140.7 mm (5.5 in)
202461.3 mm (2.4 in)
202557.7 mm (2.3 in)
202639.8 mm (1.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Spearfish by year The longest dry spell of the year at Spearfish, 1893 to 2026. The record is 71 days in 1897, marked on the chart; the median year is 27 days. 0204060801900192019401960198020002020Record: 71 days in 1897
The longest dry spell of the year at Spearfish, 1893 to 2026. The record is 71 days in 1897, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Spearfish by year
YearLongest dry spell (CDD)
189337 days
189438 days
189516 days
189635 days
189771 days
189831 days
189929 days
190024 days
190135 days
190220 days
190320 days
190443 days
190544 days
190628 days
190754 days
190836 days
190938 days
191028 days
191141 days
191238 days
191335 days
191452 days
191518 days
191627 days
191740 days
191838 days
191931 days
192016 days
192141 days
192241 days
192320 days
192418 days
192517 days
192623 days
192725 days
192839 days
192926 days
193025 days
193129 days
193221 days
193320 days
193421 days
193535 days
193643 days
193730 days
193833 days
193943 days
194025 days
194143 days
194235 days
194324 days
194423 days
194527 days
194619 days
194723 days
194837 days
194924 days
195017 days
195121 days
195264 days
195347 days
195423 days
195533 days
195620 days
195743 days
195819 days
195923 days
196036 days
196130 days
196214 days
196324 days
196436 days
196542 days
196621 days
196747 days
196837 days
196950 days
197025 days
197125 days
197219 days
197330 days
197424 days
197530 days
197625 days
197724 days
197823 days
197926 days
198019 days
198137 days
198225 days
198328 days
198430 days
198527 days
198624 days
198728 days
198835 days
198958 days
199043 days
199117 days
199218 days
19938 days
199410 days
19955 days
19969 days
199716 days
199826 days
199945 days
200028 days
200134 days
200245 days
200321 days
200426 days
200524 days
200647 days
200725 days
200826 days
200925 days
201020 days
201121 days
201243 days
201321 days
201427 days
201520 days
201617 days
201718 days
201829 days
201921 days
202037 days
202136 days
202225 days
202347 days
202429 days
202522 days
202633 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

97 years with a frost

Across 97 years with a frost, the median last spring frost at Spearfish falls on 12 May and the median first autumn frost on 30 September, which leaves a median of 140 days between them.

In 1990 to 2025 the median growing season was 150 days. That is 17 days more than in 1893 to 1931.

Fitted over all years, the growing season changes by +1.7 days per decade at this station.

Frost dates and growing season at Spearfish
MeasureMedian, all yearsEarliest period (1893 to 1931)Recent period (1990 to 2025)Recent against earliestFitted trend
Last spring frost12 May16 May10 May6 days earlier-0.6 days per decade
First autumn frost30 September24 September6 October12 days later+1.1 days per decade
Growing days140 days133 days150 days17 days more+1.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

105 years, 1893 to 2025

A day with at least 46.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 154.4 mm (6.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Spearfish: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years46.8 mm (1.8 in)
5 years67.7 mm (2.7 in)
10 years84.2 mm (3.3 in)
25 years108.8 mm (4.3 in)
50 years130.1 mm (5.1 in)
100 years154.4 mm (6.1 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 105 years of values from 1893 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 164.8 mm (6.5 in) in 1922; 164.1 mm (6.5 in) in 1976; 127.8 mm (5.0 in) in 1964.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Spearfish, at 2002. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2002 ran 0.8 C (1.4 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Spearfish, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
2002+0.8+1.4likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Spearfish had a mean temperature of 9.0 C (48.1 F) and 558.9 mm (22.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Leroy 5 WSW (United States, 449 km away), Dalton (United States, 351 km away) and Logan Utah St UNIV (United States, 712 km away).

Climate twins of Spearfish: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Leroy 5 WSWUnited States449 km (279 mi)9.2 C (48.5 F)433.0 mm (17.0 in)1.11
DaltonUnited States351 km (218 mi)9.1 C (48.4 F)481.5 mm (19.0 in)1.14
Logan Utah St UNIVUnited States712 km (442 mi)8.8 C (47.8 F)495.1 mm (19.5 in)1.15

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Spearfish standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Spearfish threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).