Built 2026-10-15 (15 October 2026)

Willcox Weather Records (USC00029334)

Record envelope, standing records and threshold days for Willcox (USC00029334), Arizona, United States, with 129 years of record.

Key Facts for Willcox

  • Willcox (USC00029334) is a weather station in Arizona, United States at 32.26 latitude and -109.84 longitude, 1,271 m (4,170 ft) above sea level.
  • The station reports from 1898 to 2026, 129 years of record.
  • 1,464 records set at Willcox still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Willcox set a daily record precipitation of 25.9 mm (1.0 in) on 17 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Arizona, United States, 32.26 latitude, -109.84 longitude.
  • Elevation: 1,271 m (4,170 ft).
  • Period of record: 1898 to 2026, 129 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

19 days at or beyond a record
Daily record high and record low at Willcox, with 2026 drawn through them The band shows the record high and record low for each calendar day at Willcox. The lines show the 2026 daily maximum and minimum. 19 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 Willcox. The lines show the 2026 daily maximum and minimum. 19 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Willcox, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan29.4 C (84.9 F)-18.3 C (-0.9 F)22.8 C (73.0 F)-4.4 C (24.1 F)
Feb31.1 C (88.0 F)-16.7 C (1.9 F)29.4 C (84.9 F)-2.2 C (28.0 F)
Mar36.7 C (98.1 F)-14.4 C (6.1 F)36.7 C (98.1 F)-2.8 C (27.0 F)
Apr37.2 C (99.0 F)-12.8 C (9.0 F)30.0 C (86.0 F)2.8 C (37.0 F)
May40.6 C (105.1 F)-7.8 C (18.0 F)36.7 C (98.1 F)5.6 C (42.1 F)
Jun44.4 C (111.9 F)-2.8 C (27.0 F)40.0 C (104.0 F)10.6 C (51.1 F)
Jul43.3 C (109.9 F)5.6 C (42.1 F)41.7 C (107.1 F)12.2 C (54.0 F)
Aug42.8 C (109.0 F)5.0 C (41.0 F)41.7 C (107.1 F)16.1 C (61.0 F)
Sep40.6 C (105.1 F)-1.1 C (30.0 F)37.2 C (99.0 F)11.7 C (53.1 F)
Oct38.3 C (100.9 F)-9.4 C (15.1 F)32.2 C (90.0 F)11.7 C (53.1 F)
Nov32.8 C (91.0 F)-13.3 C (8.1 F)n/an/a
Dec27.2 C (81.0 F)-21.7 C (-7.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Willcox by the year they were set 1,464 records at Willcox still stand. 2024 holds the most, with 30. 01020301903: 291904: 131905: 141906: 181907: 71908: 131909: 11910: 171911: 151912: 61913: 181914: 91915: 231916: 171917: 191918: 151919: 201920: 181921: 221922: 111923: 181924: 71925: 61926: 31927: 141928: 151929: 121930: 121931: 181932: 121933: 161934: 141935: 111936: 81937: 21938: 71939: 71940: 61941: 11942: 51943: 21944: 111945: 91946: 131947: 181948: 201949: 161950: 111951: 141952: 91953: 111954: 161955: 61956: 181957: 121959: 91960: 61961: 61962: 211963: 91964: 241965: 201966: 141967: 201968: 91969: 81970: 261971: 291972: 71973: 91974: 31975: 91976: 91977: 71978: 121979: 81980: 101981: 91982: 41983: 61984: 91985: 51986: 101987: 41988: 61989: 211990: 131991: 51992: 41993: 61994: 61995: 61996: 121997: 31998: 101999: 52000: 122001: 82002: 122003: 142004: 92005: 112006: 42007: 112008: 22009: 82010: 102011: 262012: 102013: 102014: 72015: 92016: 172017: 262018: 142019: 82020: 262021: 102022: 42023: 192024: 302025: 262026: 171903191619291942195519691982199520082021
1,464 records at Willcox still stand. 2024 holds the most, with 30.
Standing records at Willcox by the year they were set
Year setStanding records
190329
190413
190514
190618
19077
190813
19091
191017
191115
19126
191318
19149
191523
191617
191719
191815
191920
192018
192122
192211
192318
19247
19256
19263
192714
192815
192912
193012
193118
193212
193316
193414
193511
19368
19372
19387
19397
19406
19411
19425
19432
194411
19459
194613
194718
194820
194916
195011
195114
19529
195311
195416
19556
195618
195712
19599
19606
19616
196221
19639
196424
196520
196614
196720
19689
19698
197026
197129
19727
19739
19743
19759
19769
19777
197812
19798
198010
19819
19824
19836
19849
19855
198610
19874
19886
198921
199013
19915
19924
19936
19946
19956
199612
19973
199810
19995
200012
20018
200212
200314
20049
200511
20064
200711
20082
20098
201010
201126
201210
201310
20147
20159
201617
201726
201814
20198
202026
202110
20224
202319
202430
202526
202617

All-Time Record Progression

7 new records
When Willcox set new all-time records 7 all-time records were set at Willcox between 11 January 1962 and 20 June 2016. Each dot is a new record. Record low maximum temperatureRecord low minimum temperatureRecord daily precipitationRecord high minimum temperatureRecord high maximum temperature11 January 1962: Record low maximum temperature -2.2 C (28.0 F)15 January 1962: Record low minimum temperature -18.3 C (-0.9 F)8 December 1978: Record low maximum temperature -3.3 C (26.1 F)8 December 1978: Record low minimum temperature -21.7 C (-7.1 F)14 August 1980: Record daily precipitation 92.7 mm (3.6 in)30 June 2013: Record high minimum temperature 28.3 C (82.9 F)20 June 2016: Record high maximum temperature 44.4 C (111.9 F)19701980199020002010
7 all-time records were set at Willcox between 11 January 1962 and 20 June 2016. Each dot is a new record.
When Willcox set new all-time records
DateKindDetail
1962-01-11Record low maximum temperatureRecord low maximum temperature -2.2 C (28.0 F)
1962-01-15Record low minimum temperatureRecord low minimum temperature -18.3 C (-0.9 F)
1978-12-08Record low maximum temperatureRecord low maximum temperature -3.3 C (26.1 F)
1978-12-08Record low minimum temperatureRecord low minimum temperature -21.7 C (-7.1 F)
1980-08-14Record daily precipitationRecord daily precipitation 92.7 mm (3.6 in)
2013-06-30Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)
2016-06-20Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)

Wettest Day of Each Month

Aug: 92.7 mm (3.6 in)
Record daily precipitation for each month at Willcox The wettest day on record for each calendar month at Willcox. The most was 92.7 mm (3.6 in) on 14 August 1980. 0255075100 Jan: 47.2 mm (1.9 in), 9 January 1905 Jan Feb: 38.4 mm (1.5 in), 14 February 1980 Feb Mar: 38.1 mm (1.5 in), 16 March 1905 Mar Apr: 27.2 mm (1.1 in), 28 April 1931 Apr May: 35.6 mm (1.4 in), 20 May 1997 May Jun: 43.9 mm (1.7 in), 2 June 1952 Jun Jul: 57.9 mm (2.3 in), 21 July 1954 Jul Aug: 92.7 mm (3.6 in), 14 August 1980 Aug Sep: 53.6 mm (2.1 in), 28 September 1941 Sep Oct: 63.5 mm (2.5 in), 5 October 1989 Oct Nov: 41.1 mm (1.6 in), 28 November 2019 Nov Dec: 36.1 mm (1.4 in), 22 December 1965 Dec
The wettest day on record for each calendar month at Willcox. The most was 92.7 mm (3.6 in) on 14 August 1980.
Record daily precipitation for each month at Willcox
MonthRecord daily precipitation (mm)Date
Jan47.2 mm (1.9 in)9 January 1905
Feb38.4 mm (1.5 in)14 February 1980
Mar38.1 mm (1.5 in)16 March 1905
Apr27.2 mm (1.1 in)28 April 1931
May35.6 mm (1.4 in)20 May 1997
Jun43.9 mm (1.7 in)2 June 1952
Jul57.9 mm (2.3 in)21 July 1954
Aug92.7 mm (3.6 in)14 August 1980
Sep53.6 mm (2.1 in)28 September 1941
Oct63.5 mm (2.5 in)5 October 1989
Nov41.1 mm (1.6 in)28 November 2019
Dec36.1 mm (1.4 in)22 December 1965

Period of Record Coverage

1903 to 2026
Days with data per year at Willcox 123 years of record at Willcox, 1903 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1903, 1911, 1922, 1926, 1927, 1938, 1939, 1942 and others. 1903: 286 of 365 days1904: 366 of 366 days1905: 365 of 365 days1906: 364 of 365 days1907: 334 of 365 days1908: 336 of 366 days1909: 334 of 365 days1910: 333 of 365 days1911: 245 of 365 days1912: 366 of 366 days1913: 365 of 365 days1914: 365 of 365 days1915: 365 of 365 days1916: 365 of 366 days1917: 365 of 365 days1918: 364 of 365 days1919: 364 of 365 days1920: 355 of 366 days1921: 360 of 365 days1922: 157 of 365 days1923: 354 of 365 days1924: 351 of 366 days1925: 364 of 365 days1926: 90 of 365 days1927: 305 of 365 days1928: 354 of 366 days1929: 364 of 365 days1930: 352 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 364 of 365 days1934: 358 of 365 days1935: 365 of 365 days1936: 365 of 366 days1937: 331 of 365 days1938: 322 of 365 days1939: 188 of 365 days1940: 332 of 366 days1941: 345 of 365 days1942: 319 of 365 days1943: 355 of 365 days1944: 355 of 366 days1945: 349 of 365 days1946: 356 of 365 days1947: 350 of 365 days1948: 357 of 366 days1949: 365 of 365 days1950: 358 of 365 days1951: 364 of 365 days1952: 366 of 366 days1953: 345 of 365 days1954: 343 of 365 days1955: 356 of 365 days1956: 363 of 366 days1957: 355 of 365 days1959: 360 of 365 days1960: 355 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 360 of 365 days1971: 326 of 365 days1972: 356 of 366 days1973: 362 of 365 days1974: 362 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 364 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 365 of 365 days1982: 359 of 365 days1983: 363 of 365 days1984: 366 of 366 days1985: 364 of 365 days1986: 365 of 365 days1987: 364 of 365 days1988: 363 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 364 of 365 days1995: 363 of 365 days1996: 361 of 366 days1997: 313 of 365 days1998: 321 of 365 days1999: 308 of 365 days2000: 319 of 366 days2001: 320 of 365 days2002: 358 of 365 days2003: 330 of 365 days2004: 313 of 366 days2005: 274 of 365 days2006: 134 of 365 days2007: 364 of 365 days2008: 319 of 366 days2009: 344 of 365 days2010: 365 of 365 days2011: 356 of 365 days2012: 358 of 366 days2013: 342 of 365 days2014: 361 of 365 days2015: 362 of 365 days2016: 364 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 358 of 365 days2020: 361 of 366 days2021: 354 of 365 days2022: 344 of 365 days2023: 349 of 365 days2024: 350 of 366 days2025: 364 of 365 days2026: 269 of 365 days192019401960198020002020
123 years of record at Willcox, 1903 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1903, 1911, 1922, 1926, 1927, 1938, 1939, 1942 and others.
Days with data per year at Willcox
YearDays with dataShare of yearComplete
190328678%No
1904366100%Yes
1905365100%Yes
1906364100%Yes
190733492%Yes
190833692%Yes
190933492%Yes
191033391%Yes
191124567%No
1912366100%Yes
1913365100%Yes
1914365100%Yes
1915365100%Yes
1916365100%Yes
1917365100%Yes
1918364100%Yes
1919364100%Yes
192035597%Yes
192136099%Yes
192215743%No
192335497%Yes
192435196%Yes
1925364100%Yes
19269025%No
192730584%No
192835497%Yes
1929364100%Yes
193035296%Yes
1931365100%Yes
1932366100%Yes
1933364100%Yes
193435898%Yes
1935365100%Yes
1936365100%Yes
193733191%Yes
193832288%No
193918852%No
194033291%Yes
194134595%Yes
194231987%No
194335597%Yes
194435597%Yes
194534996%Yes
194635698%Yes
194735096%Yes
194835798%Yes
1949365100%Yes
195035898%Yes
1951364100%Yes
1952366100%Yes
195334595%Yes
195434394%Yes
195535698%Yes
195636399%Yes
195735597%Yes
195936099%Yes
196035597%Yes
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
197036099%Yes
197132689%No
197235697%Yes
197336299%Yes
197436299%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978364100%Yes
1979365100%Yes
1980365100%Yes
1981365100%Yes
198235998%Yes
198336399%Yes
1984366100%Yes
1985364100%Yes
1986365100%Yes
1987364100%Yes
198836399%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994364100%Yes
199536399%Yes
199636199%Yes
199731386%No
199832188%No
199930884%No
200031987%No
200132088%No
200235898%Yes
200333090%Yes
200431386%No
200527475%No
200613437%No
2007364100%Yes
200831987%No
200934494%Yes
2010365100%Yes
201135698%Yes
201235898%Yes
201334294%Yes
201436199%Yes
201536299%Yes
201636499%Yes
2017365100%Yes
2018365100%Yes
201935898%Yes
202036199%Yes
202135497%Yes
202234494%Yes
202334996%Yes
202435096%Yes
2025364100%Yes
202626974%No

Latest Records

20
Latest records at Willcox
DateStationRecordValueBeat old record byOld record stoodSignificance
17 September 2026Willcox, USdaily rain (Provisional)25.9 mm (1.0 in)14.5 mm (0.6 in)105 years58 of 100 (Notable)
12 September 2026Willcox, USdaily high min (Provisional)20.6 C (69.1 F)1.7 C (3.1 F)85 years39 of 100 (Notable)
9 September 2026Willcox, USdaily high min (Tie, Provisional)20.0 C (68.0 F)tie28 years4 of 100 (Routine)
8 September 2026Willcox, USdaily high min (Tie, Provisional)20.6 C (69.1 F)tie55 years6 of 100 (Routine)
7 September 2026Willcox, USdaily high min (Tie, Provisional)21.7 C (71.1 F)tie31 years4 of 100 (Routine)
28 August 2026Willcox, USdaily high max (Provisional)40.6 C (105.1 F)1.2 C (2.2 F)15 years17 of 100 (Routine)
27 August 2026Willcox, USdaily high max (Provisional)40.6 C (105.1 F)1.7 C (3.1 F)28 years23 of 100 (Routine)
26 August 2026Willcox, USdaily high max (Provisional)41.7 C (107.1 F)2.8 C (5.0 F)5 years20 of 100 (Routine)
25 August 2026Willcox, USdaily high max (Tie, Provisional)38.9 C (102.0 F)tie5 years2 of 100 (Routine)
24 August 2026Willcox, USdaily high max (Provisional)40.0 C (104.0 F)0.6 C (1.1 F)0 years11 of 100 (Routine)
23 August 2026Willcox, USdaily high max (Provisional)39.4 C (102.9 F)1.1 C (2.0 F)15 years17 of 100 (Routine)
22 August 2026Willcox, USdaily high max (Tie, Provisional)40.0 C (104.0 F)tie7 years3 of 100 (Routine)
3 August 2026Willcox, USdaily high min23.9 C (75.0 F)1.7 C (3.1 F)15 years20 of 100 (Routine)
2 August 2026Willcox, USdaily high max40.6 C (105.1 F)0.6 C (1.1 F)81 years35 of 100 (Notable)
2 August 2026Willcox, USdaily high min (Tie)21.7 C (71.1 F)tie117 years10 of 100 (Routine)
1 August 2026Willcox, USdaily high min22.8 C (73.0 F)1.1 C (2.0 F)65 years33 of 100 (Routine)
20 July 2026Willcox, USdaily rain50.5 mm (2.0 in)11.1 mm (0.4 in)116 years54 of 100 (Notable)
17 June 2026Willcox, USdaily high min22.8 C (73.0 F)2.2 C (4.0 F)32 years23 of 100 (Routine)
4 April 2026Willcox, USdaily high min (Tie)11.1 C (52.0 F)tie32 years4 of 100 (Routine)
1 April 2026Willcox, USdaily high min15.0 C (59.0 F)2.2 C (4.0 F)20 years21 of 100 (Routine)

Climate Trend

101 complete years, 1904 to 2025
Annual mean temperature at Willcox as warming stripes, 1904 to 2025 One stripe for each of 101 complete years at Willcox, 1904 to 2025. Blue stripes are years cooler than the station's own mean of 15.5 C (60.0 F); red stripes are warmer. The coolest year was 1930, at 13.0 C (55.3 F), and the warmest was 2003, at 17.7 C (63.8 F). The strongest colour marks a difference of 2.6 C (4.7 F). 1904: 15.0 C, -0.5 C from the station mean1905: 15.4 C, -0.1 C from the station mean1906: 15.2 C, -0.3 C from the station mean1912: 14.0 C, -1.5 C from the station mean1913: 14.0 C, -1.5 C from the station mean1914: 16.2 C, +0.6 C from the station mean1915: 15.6 C, +0.1 C from the station mean1916: 16.2 C, +0.7 C from the station mean1917: 13.7 C, -1.8 C from the station mean1918: 14.1 C, -1.5 C from the station mean1919: 13.5 C, -2.0 C from the station mean1921: 14.7 C, -0.8 C from the station mean1923: 13.9 C, -1.6 C from the station mean1924: 14.5 C, -1.0 C from the station mean1925: 14.8 C, -0.8 C from the station mean1928: 14.1 C, -1.4 C from the station mean1929: 13.1 C, -2.5 C from the station mean1930: 13.0 C, -2.6 C from the station mean1931: 13.8 C, -1.7 C from the station mean1932: 13.9 C, -1.6 C from the station mean1933: 14.3 C, -1.3 C from the station mean1934: 15.1 C, -0.5 C from the station mean1935: 14.3 C, -1.3 C from the station mean1936: 15.0 C, -0.6 C from the station mean1941: 15.3 C, -0.2 C from the station mean1943: 15.7 C, +0.2 C from the station mean1944: 14.7 C, -0.8 C from the station mean1945: 14.8 C, -0.8 C from the station mean1946: 15.5 C, -0.1 C from the station mean1947: 15.3 C, -0.2 C from the station mean1948: 15.3 C, -0.3 C from the station mean1949: 15.1 C, -0.4 C from the station mean1950: 16.0 C, +0.5 C from the station mean1951: 15.6 C, 0.0 C from the station mean1952: 15.5 C, 0.0 C from the station mean1953: 15.2 C, -0.3 C from the station mean1955: 15.0 C, -0.5 C from the station mean1956: 15.5 C, -0.1 C from the station mean1957: 15.5 C, 0.0 C from the station mean1959: 15.3 C, -0.2 C from the station mean1960: 15.0 C, -0.5 C from the station mean1961: 14.7 C, -0.8 C from the station mean1962: 14.8 C, -0.7 C from the station mean1963: 14.9 C, -0.6 C from the station mean1964: 13.8 C, -1.7 C from the station mean1965: 14.6 C, -0.9 C from the station mean1966: 14.4 C, -1.1 C from the station mean1967: 14.4 C, -1.2 C from the station mean1968: 14.2 C, -1.3 C from the station mean1969: 14.9 C, -0.7 C from the station mean1970: 14.2 C, -1.3 C from the station mean1971: 14.0 C, -1.5 C from the station mean1972: 15.8 C, +0.3 C from the station mean1973: 15.1 C, -0.5 C from the station mean1974: 15.7 C, +0.2 C from the station mean1975: 14.9 C, -0.7 C from the station mean1976: 15.2 C, -0.3 C from the station mean1977: 16.3 C, +0.7 C from the station mean1978: 16.1 C, +0.5 C from the station mean1979: 15.6 C, +0.1 C from the station mean1980: 16.2 C, +0.7 C from the station mean1981: 16.6 C, +1.1 C from the station mean1982: 15.7 C, +0.2 C from the station mean1983: 15.8 C, +0.2 C from the station mean1984: 16.0 C, +0.4 C from the station mean1985: 16.0 C, +0.4 C from the station mean1986: 16.2 C, +0.7 C from the station mean1987: 15.4 C, -0.1 C from the station mean1988: 16.0 C, +0.4 C from the station mean1989: 16.7 C, +1.1 C from the station mean1990: 16.1 C, +0.5 C from the station mean1991: 15.6 C, 0.0 C from the station mean1992: 15.8 C, +0.2 C from the station mean1993: 16.3 C, +0.7 C from the station mean1994: 16.8 C, +1.2 C from the station mean1995: 16.6 C, +1.0 C from the station mean1996: 17.1 C, +1.6 C from the station mean1998: 16.4 C, +0.9 C from the station mean1999: 16.5 C, +0.9 C from the station mean2000: 17.0 C, +1.4 C from the station mean2001: 16.7 C, +1.1 C from the station mean2002: 16.8 C, +1.2 C from the station mean2003: 17.7 C, +2.2 C from the station mean2004: 16.6 C, +1.0 C from the station mean2007: 17.0 C, +1.5 C from the station mean2009: 17.0 C, +1.4 C from the station mean2010: 16.6 C, +1.1 C from the station mean2011: 16.6 C, +1.1 C from the station mean2012: 17.2 C, +1.7 C from the station mean2014: 17.1 C, +1.6 C from the station mean2015: 16.8 C, +1.2 C from the station mean2016: 16.5 C, +1.0 C from the station mean2017: 17.1 C, +1.6 C from the station mean2018: 17.2 C, +1.7 C from the station mean2019: 16.5 C, +0.9 C from the station mean2020: 16.8 C, +1.3 C from the station mean2021: 16.5 C, +0.9 C from the station mean2022: 16.2 C, +0.7 C from the station mean2023: 16.6 C, +1.0 C from the station mean2024: 17.2 C, +1.7 C from the station mean2025: 17.4 C, +1.9 C from the station mean1904191019201930194019501960197019801990200020102020
One stripe for each of 101 complete years at Willcox, 1904 to 2025. Blue stripes are years cooler than the station's own mean of 15.5 C (60.0 F); red stripes are warmer. The coolest year was 1930, at 13.0 C (55.3 F), and the warmest was 2003, at 17.7 C (63.8 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Willcox as warming stripes, 1904 to 2025
YearAnnual mean temperatureDifference from the station mean
190415.0 C-0.55 C
190515.4 C-0.11 C
190615.2 C-0.33 C
191214.0 C-1.52 C
191314.0 C-1.53 C
191416.2 C+0.64 C
191515.6 C+0.08 C
191616.2 C+0.69 C
191713.7 C-1.81 C
191814.1 C-1.48 C
191913.5 C-2.03 C
192114.7 C-0.85 C
192313.9 C-1.62 C
192414.5 C-1.04 C
192514.8 C-0.77 C
192814.1 C-1.42 C
192913.1 C-2.49 C
193013.0 C-2.59 C
193113.8 C-1.70 C
193213.9 C-1.64 C
193314.3 C-1.29 C
193415.1 C-0.49 C
193514.3 C-1.26 C
193615.0 C-0.56 C
194115.3 C-0.24 C
194315.7 C+0.15 C
194414.7 C-0.81 C
194514.8 C-0.77 C
194615.5 C-0.09 C
194715.3 C-0.20 C
194815.3 C-0.29 C
194915.1 C-0.40 C
195016.0 C+0.45 C
195115.6 C+0.04 C
195215.5 C-0.04 C
195315.2 C-0.35 C
195515.0 C-0.50 C
195615.5 C-0.07 C
195715.5 C-0.03 C
195915.3 C-0.22 C
196015.0 C-0.54 C
196114.7 C-0.85 C
196214.8 C-0.74 C
196314.9 C-0.63 C
196413.8 C-1.75 C
196514.6 C-0.92 C
196614.4 C-1.11 C
196714.4 C-1.18 C
196814.2 C-1.34 C
196914.9 C-0.66 C
197014.2 C-1.34 C
197114.0 C-1.55 C
197215.8 C+0.25 C
197315.1 C-0.47 C
197415.7 C+0.20 C
197514.9 C-0.66 C
197615.2 C-0.33 C
197716.3 C+0.71 C
197816.1 C+0.54 C
197915.6 C+0.08 C
198016.2 C+0.68 C
198116.6 C+1.07 C
198215.7 C+0.19 C
198315.8 C+0.23 C
198416.0 C+0.43 C
198516.0 C+0.44 C
198616.2 C+0.70 C
198715.4 C-0.12 C
198816.0 C+0.44 C
198916.7 C+1.12 C
199016.1 C+0.53 C
199115.6 C+0.02 C
199215.8 C+0.23 C
199316.3 C+0.74 C
199416.8 C+1.23 C
199516.6 C+1.02 C
199617.1 C+1.55 C
199816.4 C+0.85 C
199916.5 C+0.93 C
200017.0 C+1.43 C
200116.7 C+1.13 C
200216.8 C+1.23 C
200317.7 C+2.15 C
200416.6 C+1.01 C
200717.0 C+1.45 C
200917.0 C+1.41 C
201016.6 C+1.09 C
201116.6 C+1.09 C
201217.2 C+1.65 C
201417.1 C+1.56 C
201516.8 C+1.21 C
201616.5 C+1.00 C
201717.1 C+1.58 C
201817.2 C+1.66 C
201916.5 C+0.91 C
202016.8 C+1.25 C
202116.5 C+0.92 C
202216.2 C+0.67 C
202316.6 C+1.03 C
202417.2 C+1.69 C
202517.4 C+1.87 C

The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1904 to 2025. In Fahrenheit: 0.4 F (0.4 to 0.5) per decade. The slope is a straight line fitted to 101 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Willcox
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.2 to 0.3) per decade0.4 F (0.4 to 0.5) per decade1904 to 2025101Rise
Mean daily maximum0.2 C (0.2 to 0.3) per decade0.4 F (0.3 to 0.5) per decade1904 to 2025101Rise
Mean daily minimum0.2 C (0.2 to 0.3) per decade0.4 F (0.3 to 0.5) per decade1904 to 2025101Rise

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

1898 to 2026
Yearly extremes at Willcox: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)201640.6 C (105.1 F)123
Coldest night (TNn)-21.7 C (-7.1 F)1978-11.1 C (12.0 F)123
Wettest day (Rx1day)92.7 mm (3.6 in)198030.9 mm (1.2 in)128
Wettest five days (Rx5day)168.7 mm (6.6 in)198350.8 mm (2.0 in)128
Longest dry spell (CDD)148 days197261 days128

Hottest day (TXx)

Hottest day (TXx) at Willcox by year The hottest day of the year at Willcox, 1898 to 2026. The record is 44.4 C (111.9 F) in 2016, marked on the chart; the median year is 40.6 C (105.1 F). 25303540451900192019401960198020002020Record: 44.4 C (111.9 F) in 2016
The hottest day of the year at Willcox, 1898 to 2026. The record is 44.4 C (111.9 F) in 2016, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Willcox by year
YearHottest day (TXx)
1898n/a
1899n/a
1900n/a
1901n/a
1902n/a
190340.0 C (104.0 F)
190440.0 C (104.0 F)
190543.3 C (109.9 F)
190642.2 C (108.0 F)
190739.4 C (102.9 F)
190838.3 C (100.9 F)
190940.6 C (105.1 F)
191041.7 C (107.1 F)
191138.3 C (100.9 F)
191239.4 C (102.9 F)
191340.6 C (105.1 F)
191440.0 C (104.0 F)
191539.4 C (102.9 F)
191640.6 C (105.1 F)
191740.0 C (104.0 F)
191836.7 C (98.1 F)
191936.7 C (98.1 F)
192036.7 C (98.1 F)
192138.3 C (100.9 F)
192238.9 C (102.0 F)
192338.3 C (100.9 F)
192440.6 C (105.1 F)
192538.3 C (100.9 F)
192628.9 C (84.0 F)
192736.7 C (98.1 F)
192837.8 C (100.0 F)
192940.6 C (105.1 F)
193037.2 C (99.0 F)
193138.9 C (102.0 F)
193238.3 C (100.9 F)
193337.8 C (100.0 F)
193440.0 C (104.0 F)
193537.8 C (100.0 F)
193638.9 C (102.0 F)
193737.8 C (100.0 F)
193838.3 C (100.9 F)
193932.2 C (90.0 F)
194040.6 C (105.1 F)
194139.4 C (102.9 F)
194240.6 C (105.1 F)
194338.9 C (102.0 F)
194440.6 C (105.1 F)
194540.6 C (105.1 F)
194641.1 C (106.0 F)
194740.6 C (105.1 F)
194841.7 C (107.1 F)
194939.4 C (102.9 F)
195041.1 C (106.0 F)
195140.6 C (105.1 F)
195240.0 C (104.0 F)
195341.7 C (107.1 F)
195441.1 C (106.0 F)
195541.1 C (106.0 F)
195641.7 C (107.1 F)
195740.0 C (104.0 F)
195938.9 C (102.0 F)
196041.7 C (107.1 F)
196140.6 C (105.1 F)
196240.6 C (105.1 F)
196340.6 C (105.1 F)
196440.6 C (105.1 F)
196540.0 C (104.0 F)
196639.4 C (102.9 F)
196740.6 C (105.1 F)
196841.1 C (106.0 F)
196942.2 C (108.0 F)
197042.8 C (109.0 F)
197141.7 C (107.1 F)
197241.1 C (106.0 F)
197341.7 C (107.1 F)
197441.7 C (107.1 F)
197538.9 C (102.0 F)
197639.4 C (102.9 F)
197738.9 C (102.0 F)
197840.6 C (105.1 F)
197941.1 C (106.0 F)
198041.7 C (107.1 F)
198139.4 C (102.9 F)
198238.3 C (100.9 F)
198339.4 C (102.9 F)
198438.3 C (100.9 F)
198540.6 C (105.1 F)
198640.0 C (104.0 F)
198738.9 C (102.0 F)
198839.4 C (102.9 F)
198942.2 C (108.0 F)
199043.3 C (109.9 F)
199139.4 C (102.9 F)
199240.0 C (104.0 F)
199340.0 C (104.0 F)
199443.3 C (109.9 F)
199541.7 C (107.1 F)
199640.6 C (105.1 F)
199741.1 C (106.0 F)
199841.1 C (106.0 F)
199940.6 C (105.1 F)
200039.4 C (102.9 F)
200138.9 C (102.0 F)
200240.0 C (104.0 F)
200342.8 C (109.0 F)
200439.4 C (102.9 F)
200540.0 C (104.0 F)
200633.3 C (91.9 F)
200741.1 C (106.0 F)
200840.6 C (105.1 F)
200940.6 C (105.1 F)
201041.1 C (106.0 F)
201143.3 C (109.9 F)
201241.1 C (106.0 F)
201342.8 C (109.0 F)
201440.6 C (105.1 F)
201541.1 C (106.0 F)
201644.4 C (111.9 F)
201744.4 C (111.9 F)
201842.8 C (109.0 F)
201941.7 C (107.1 F)
202043.3 C (109.9 F)
202143.9 C (111.0 F)
202241.7 C (107.1 F)
202343.3 C (109.9 F)
202442.2 C (108.0 F)
202542.8 C (109.0 F)
202641.7 C (107.1 F)

Coldest night (TNn)

Coldest night (TNn) at Willcox by year The coldest night of the year at Willcox, 1898 to 2026. The record is -21.7 C (-7.1 F) in 1978, marked on the chart; the median year is -11.1 C (12.0 F). -25-20-15-10-501900192019401960198020002020Record: -21.7 C (-7.1 F) in 1978
The coldest night of the year at Willcox, 1898 to 2026. The record is -21.7 C (-7.1 F) in 1978, marked on the chart; the median year is -11.1 C (12.0 F).
Coldest night (TNn) at Willcox by year
YearColdest night (TNn)
1898n/a
1899n/a
1900n/a
1901n/a
1902n/a
1903-10.0 C (14.0 F)
1904-13.3 C (8.1 F)
1905-8.3 C (17.1 F)
1906-8.9 C (16.0 F)
1907-8.3 C (17.1 F)
1908-8.9 C (16.0 F)
1909-7.2 C (19.0 F)
1910-11.1 C (12.0 F)
1911-11.1 C (12.0 F)
1912-12.2 C (10.0 F)
1913-16.7 C (1.9 F)
1914-12.2 C (10.0 F)
1915-8.3 C (17.1 F)
1916-11.7 C (10.9 F)
1917-11.7 C (10.9 F)
1918-12.8 C (9.0 F)
1919-11.7 C (10.9 F)
1920-12.8 C (9.0 F)
1921-13.3 C (8.1 F)
1922-12.8 C (9.0 F)
1923-14.4 C (6.1 F)
1924-10.0 C (14.0 F)
1925-13.9 C (7.0 F)
1926-9.4 C (15.1 F)
1927-7.8 C (18.0 F)
1928-12.2 C (10.0 F)
1929-12.8 C (9.0 F)
1930-13.3 C (8.1 F)
1931-12.2 C (10.0 F)
1932-14.4 C (6.1 F)
1933-11.7 C (10.9 F)
1934-12.2 C (10.0 F)
1935-10.6 C (12.9 F)
1936-10.0 C (14.0 F)
1937-11.7 C (10.9 F)
1938-12.8 C (9.0 F)
1939-12.8 C (9.0 F)
1940-8.9 C (16.0 F)
1941-8.3 C (17.1 F)
1942-8.9 C (16.0 F)
1943-9.4 C (15.1 F)
1944-13.9 C (7.0 F)
1945-10.6 C (12.9 F)
1946-11.1 C (12.0 F)
1947-12.8 C (9.0 F)
1948-15.6 C (3.9 F)
1949-12.8 C (9.0 F)
1950-12.8 C (9.0 F)
1951-12.8 C (9.0 F)
1952-10.6 C (12.9 F)
1953-13.3 C (8.1 F)
1954-15.0 C (5.0 F)
1955-13.3 C (8.1 F)
1956-13.3 C (8.1 F)
1957-10.0 C (14.0 F)
1959-13.3 C (8.1 F)
1960-13.3 C (8.1 F)
1961-11.7 C (10.9 F)
1962-18.3 C (-0.9 F)
1963-12.8 C (9.0 F)
1964-15.6 C (3.9 F)
1965-13.3 C (8.1 F)
1966-15.0 C (5.0 F)
1967-15.0 C (5.0 F)
1968-17.8 C (0.0 F)
1969-12.8 C (9.0 F)
1970-13.3 C (8.1 F)
1971-16.7 C (1.9 F)
1972-10.6 C (12.9 F)
1973-11.7 C (10.9 F)
1974-13.3 C (8.1 F)
1975-10.0 C (14.0 F)
1976-11.7 C (10.9 F)
1977-9.4 C (15.1 F)
1978-21.7 C (-7.1 F)
1979-9.4 C (15.1 F)
1980-8.3 C (17.1 F)
1981-10.0 C (14.0 F)
1982-8.9 C (16.0 F)
1983-7.8 C (18.0 F)
1984-8.9 C (16.0 F)
1985-10.0 C (14.0 F)
1986-7.8 C (18.0 F)
1987-12.8 C (9.0 F)
1988-12.8 C (9.0 F)
1989-11.7 C (10.9 F)
1990-12.8 C (9.0 F)
1991-9.4 C (15.1 F)
1992-11.1 C (12.0 F)
1993-10.0 C (14.0 F)
1994-11.1 C (12.0 F)
1995-7.2 C (19.0 F)
1996-11.7 C (10.9 F)
1997-10.0 C (14.0 F)
1998-7.2 C (19.0 F)
1999-9.4 C (15.1 F)
2000-9.4 C (15.1 F)
2001-8.9 C (16.0 F)
2002-10.0 C (14.0 F)
2003-12.2 C (10.0 F)
2004-8.9 C (16.0 F)
2005-11.1 C (12.0 F)
2006-9.4 C (15.1 F)
2007-12.8 C (9.0 F)
2008-9.4 C (15.1 F)
2009-7.8 C (18.0 F)
2010-8.9 C (16.0 F)
2011-16.1 C (3.0 F)
2012-8.9 C (16.0 F)
2013-13.9 C (7.0 F)
2014-8.9 C (16.0 F)
2015-10.0 C (14.0 F)
2016-10.0 C (14.0 F)
2017-10.6 C (12.9 F)
2018-8.9 C (16.0 F)
2019-8.3 C (17.1 F)
2020-9.4 C (15.1 F)
2021-10.0 C (14.0 F)
2022-10.6 C (12.9 F)
2023-9.4 C (15.1 F)
2024-8.9 C (16.0 F)
2025-11.1 C (12.0 F)
2026-4.4 C (24.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Willcox by year The wettest day of the year at Willcox, 1898 to 2026. The record is 92.7 mm (3.6 in) in 1980, marked on the chart; the median year is 30.9 mm (1.2 in). 0204060801001900192019401960198020002020Record: 92.7 mm (3.6 in) in 1980
The wettest day of the year at Willcox, 1898 to 2026. The record is 92.7 mm (3.6 in) in 1980, marked on the chart; the median year is 30.9 mm (1.2 in).
Wettest day (Rx1day) at Willcox by year
YearWettest day (Rx1day)
189820.3 mm (0.8 in)
189920.3 mm (0.8 in)
190025.4 mm (1.0 in)
190138.1 mm (1.5 in)
190225.4 mm (1.0 in)
190325.4 mm (1.0 in)
190441.1 mm (1.6 in)
190547.2 mm (1.9 in)
190687.1 mm (3.4 in)
190733.0 mm (1.3 in)
190850.8 mm (2.0 in)
190939.4 mm (1.6 in)
191022.4 mm (0.9 in)
191128.4 mm (1.1 in)
191222.9 mm (0.9 in)
191339.4 mm (1.6 in)
191433.0 mm (1.3 in)
191531.2 mm (1.2 in)
191645.7 mm (1.8 in)
191735.1 mm (1.4 in)
191825.4 mm (1.0 in)
191941.9 mm (1.6 in)
192033.0 mm (1.3 in)
192130.5 mm (1.2 in)
192224.1 mm (0.9 in)
192335.8 mm (1.4 in)
192441.4 mm (1.6 in)
192528.2 mm (1.1 in)
192624.9 mm (1.0 in)
192724.9 mm (1.0 in)
192830.5 mm (1.2 in)
192938.1 mm (1.5 in)
193029.2 mm (1.1 in)
193147.0 mm (1.9 in)
193226.2 mm (1.0 in)
193327.9 mm (1.1 in)
193440.9 mm (1.6 in)
193529.2 mm (1.1 in)
193624.6 mm (1.0 in)
193727.9 mm (1.1 in)
193858.4 mm (2.3 in)
193919.3 mm (0.8 in)
194062.0 mm (2.4 in)
194153.6 mm (2.1 in)
194230.5 mm (1.2 in)
194319.1 mm (0.8 in)
194433.0 mm (1.3 in)
194515.2 mm (0.6 in)
194642.4 mm (1.7 in)
194729.7 mm (1.2 in)
194869.9 mm (2.8 in)
194950.8 mm (2.0 in)
195018.5 mm (0.7 in)
195160.2 mm (2.4 in)
195243.9 mm (1.7 in)
195324.1 mm (0.9 in)
195457.9 mm (2.3 in)
195537.1 mm (1.5 in)
195620.3 mm (0.8 in)
195719.8 mm (0.8 in)
195923.1 mm (0.9 in)
196022.1 mm (0.9 in)
196149.5 mm (1.9 in)
196233.3 mm (1.3 in)
196344.5 mm (1.8 in)
196425.9 mm (1.0 in)
196539.9 mm (1.6 in)
196636.3 mm (1.4 in)
196751.6 mm (2.0 in)
196823.4 mm (0.9 in)
196924.6 mm (1.0 in)
197040.9 mm (1.6 in)
197145.7 mm (1.8 in)
197260.5 mm (2.4 in)
197318.8 mm (0.7 in)
197427.4 mm (1.1 in)
197540.6 mm (1.6 in)
197617.0 mm (0.7 in)
197727.7 mm (1.1 in)
197829.7 mm (1.2 in)
197930.0 mm (1.2 in)
198092.7 mm (3.6 in)
198127.2 mm (1.1 in)
198229.7 mm (1.2 in)
198353.8 mm (2.1 in)
198429.2 mm (1.1 in)
198541.9 mm (1.6 in)
198653.6 mm (2.1 in)
198726.2 mm (1.0 in)
198833.5 mm (1.3 in)
198963.5 mm (2.5 in)
199058.9 mm (2.3 in)
199126.2 mm (1.0 in)
199241.4 mm (1.6 in)
199343.7 mm (1.7 in)
199437.3 mm (1.5 in)
199529.5 mm (1.2 in)
199626.2 mm (1.0 in)
199735.6 mm (1.4 in)
199826.2 mm (1.0 in)
199955.9 mm (2.2 in)
200046.7 mm (1.8 in)
200137.8 mm (1.5 in)
200230.5 mm (1.2 in)
200316.3 mm (0.6 in)
200426.9 mm (1.1 in)
200548.8 mm (1.9 in)
200614.0 mm (0.6 in)
200729.7 mm (1.2 in)
200836.6 mm (1.4 in)
200940.6 mm (1.6 in)
201029.2 mm (1.1 in)
201128.4 mm (1.1 in)
201245.5 mm (1.8 in)
201328.7 mm (1.1 in)
201439.9 mm (1.6 in)
201534.8 mm (1.4 in)
201630.5 mm (1.2 in)
201747.8 mm (1.9 in)
201845.0 mm (1.8 in)
201941.1 mm (1.6 in)
202018.8 mm (0.7 in)
202129.5 mm (1.2 in)
202227.9 mm (1.1 in)
202329.7 mm (1.2 in)
202422.6 mm (0.9 in)
202524.4 mm (1.0 in)
202650.5 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Willcox by year The wettest five days of the year at Willcox, 1898 to 2026. The record is 168.7 mm (6.6 in) in 1983, marked on the chart; the median year is 50.8 mm (2.0 in). 0501001502001900192019401960198020002020Record: 168.7 mm (6.6 in) in 1983
The wettest five days of the year at Willcox, 1898 to 2026. The record is 168.7 mm (6.6 in) in 1983, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest five days (Rx5day) at Willcox by year
YearWettest five days (Rx5day)
189837.1 mm (1.5 in)
189932.1 mm (1.3 in)
190041.1 mm (1.6 in)
190139.4 mm (1.6 in)
190232.3 mm (1.3 in)
190325.4 mm (1.0 in)
190460.9 mm (2.4 in)
190559.1 mm (2.3 in)
1906102.4 mm (4.0 in)
190756.2 mm (2.2 in)
190853.3 mm (2.1 in)
190955.6 mm (2.2 in)
191034.0 mm (1.3 in)
191129.2 mm (1.1 in)
191252.6 mm (2.1 in)
191348.3 mm (1.9 in)
191478.2 mm (3.1 in)
191565.3 mm (2.6 in)
191682.2 mm (3.2 in)
191735.1 mm (1.4 in)
191833.6 mm (1.3 in)
191950.5 mm (2.0 in)
192050.8 mm (2.0 in)
192172.4 mm (2.9 in)
192226.6 mm (1.0 in)
192351.2 mm (2.0 in)
192443.2 mm (1.7 in)
192529.0 mm (1.1 in)
192661.2 mm (2.4 in)
192750.8 mm (2.0 in)
192850.3 mm (2.0 in)
192991.2 mm (3.6 in)
193072.1 mm (2.8 in)
193155.2 mm (2.2 in)
193249.6 mm (2.0 in)
193336.5 mm (1.4 in)
193480.2 mm (3.2 in)
193546.5 mm (1.8 in)
193640.3 mm (1.6 in)
193739.3 mm (1.5 in)
193875.1 mm (3.0 in)
193920.6 mm (0.8 in)
194091.2 mm (3.6 in)
194171.6 mm (2.8 in)
194253.6 mm (2.1 in)
194338.2 mm (1.5 in)
194453.9 mm (2.1 in)
194536.6 mm (1.4 in)
194651.1 mm (2.0 in)
194730.0 mm (1.2 in)
194894.8 mm (3.7 in)
194971.2 mm (2.8 in)
195029.5 mm (1.2 in)
195165.8 mm (2.6 in)
195245.7 mm (1.8 in)
195349.8 mm (2.0 in)
195485.0 mm (3.3 in)
195581.7 mm (3.2 in)
195643.4 mm (1.7 in)
195723.9 mm (0.9 in)
195958.7 mm (2.3 in)
196025.4 mm (1.0 in)
196177.0 mm (3.0 in)
196244.8 mm (1.8 in)
196348.6 mm (1.9 in)
196447.7 mm (1.9 in)
196572.0 mm (2.8 in)
196676.3 mm (3.0 in)
196777.1 mm (3.0 in)
196837.3 mm (1.5 in)
196933.8 mm (1.3 in)
197067.1 mm (2.6 in)
197178.7 mm (3.1 in)
197261.5 mm (2.4 in)
197333.5 mm (1.3 in)
197429.9 mm (1.2 in)
197577.5 mm (3.1 in)
197635.5 mm (1.4 in)
197751.0 mm (2.0 in)
197843.8 mm (1.7 in)
197936.3 mm (1.4 in)
1980119.9 mm (4.7 in)
198135.3 mm (1.4 in)
198239.4 mm (1.6 in)
1983168.7 mm (6.6 in)
198446.2 mm (1.8 in)
198551.8 mm (2.0 in)
198663.3 mm (2.5 in)
198741.4 mm (1.6 in)
198859.4 mm (2.3 in)
198977.5 mm (3.1 in)
199092.4 mm (3.6 in)
199144.7 mm (1.8 in)
199256.8 mm (2.2 in)
199385.1 mm (3.4 in)
199462.8 mm (2.5 in)
199543.2 mm (1.7 in)
199638.1 mm (1.5 in)
199747.7 mm (1.9 in)
199833.3 mm (1.3 in)
1999115.1 mm (4.5 in)
200090.4 mm (3.6 in)
200147.2 mm (1.9 in)
200238.6 mm (1.5 in)
200326.2 mm (1.0 in)
200455.1 mm (2.2 in)
200552.9 mm (2.1 in)
200617.3 mm (0.7 in)
200777.9 mm (3.1 in)
200851.5 mm (2.0 in)
200943.9 mm (1.7 in)
201046.0 mm (1.8 in)
201153.8 mm (2.1 in)
201266.6 mm (2.6 in)
201335.4 mm (1.4 in)
201453.9 mm (2.1 in)
201557.7 mm (2.3 in)
201664.3 mm (2.5 in)
201747.8 mm (1.9 in)
201866.1 mm (2.6 in)
201959.6 mm (2.3 in)
202024.2 mm (1.0 in)
202148.0 mm (1.9 in)
202259.6 mm (2.3 in)
202330.5 mm (1.2 in)
202430.5 mm (1.2 in)
202529.2 mm (1.1 in)
202673.2 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Willcox by year The longest dry spell of the year at Willcox, 1898 to 2026. The record is 148 days in 1972, marked on the chart; the median year is 61 days. 0501001501900192019401960198020002020Record: 148 days in 1972
The longest dry spell of the year at Willcox, 1898 to 2026. The record is 148 days in 1972, marked on the chart; the median year is 61 days.
Longest dry spell (CDD) at Willcox by year
YearLongest dry spell (CDD)
189878 days
189946 days
1900104 days
190177 days
190257 days
190394 days
190446 days
190541 days
190691 days
190735 days
190864 days
190994 days
191064 days
191141 days
191254 days
191382 days
191452 days
191535 days
191671 days
1917102 days
191877 days
191943 days
192043 days
192153 days
192282 days
192374 days
192455 days
192535 days
192628 days
192754 days
192876 days
192997 days
193060 days
193142 days
193269 days
1933108 days
193435 days
193587 days
193666 days
193744 days
193856 days
193924 days
194057 days
194149 days
194253 days
194363 days
194462 days
194588 days
194667 days
194750 days
194891 days
194967 days
195088 days
195180 days
195241 days
195372 days
195454 days
1955114 days
195652 days
195734 days
195960 days
196074 days
1961105 days
196263 days
196345 days
196469 days
196565 days
196689 days
196760 days
196836 days
196965 days
197070 days
197167 days
1972148 days
197381 days
1974102 days
197578 days
197666 days
197761 days
197851 days
197951 days
198056 days
1981101 days
198257 days
198374 days
198483 days
198536 days
198672 days
198741 days
198850 days
198952 days
199036 days
199163 days
199230 days
199358 days
199432 days
199567 days
199668 days
199736 days
199868 days
199998 days
200078 days
200134 days
200297 days
2003117 days
200476 days
200559 days
200649 days
200742 days
200843 days
200941 days
201077 days
2011103 days
201257 days
201392 days
201474 days
201524 days
201659 days
201759 days
2018107 days
201955 days
202052 days
202148 days
202252 days
202360 days
202480 days
202545 days
202651 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

101 years with a frost

Across 101 years with a frost, the median last spring frost at Willcox falls on 28 April and the median first autumn frost on 25 October, which leaves a median of 181 days between them.

In 1991 to 2025 the median growing season was 198 days. That is 30 days more than in 1904 to 1947.

Fitted over all years, the growing season changes by +3.5 days per decade at this station.

Frost dates and growing season at Willcox
MeasureMedian, all yearsEarliest period (1904 to 1947)Recent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost28 April4 May16 April18 days earlier-2.4 days per decade
First autumn frost25 October20 October31 October11 days later+1.1 days per decade
Growing days181 days168 days198 days30 days more+3.5 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

117 years, 1900 to 2025

A day with at least 33.7 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 83.1 mm (3.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Willcox: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years33.7 mm (1.3 in)
5 years45.7 mm (1.8 in)
10 years54.1 mm (2.1 in)
25 years65.3 mm (2.6 in)
50 years74.0 mm (2.9 in)
100 years83.1 mm (3.3 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 117 years of values from 1900 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: 92.7 mm (3.6 in) in 1980; 87.1 mm (3.4 in) in 1906; 69.9 mm (2.8 in) in 1948.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Willcox, at 1972 and 1986. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1972 ran 0.9 C (1.6 F) higher than in the years before (likely change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Willcox, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1972+0.9+1.6likely5
1986-0.2-0.4likely5

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, Willcox had a mean temperature of 16.8 C (62.3 F) and 298.2 mm (11.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Agua Prieta (Mexico, 108 km away), Mitchell Caverns (United States, 607 km away) and Tuzigoot Nm (United States, 344 km away).

Climate twins of Willcox: 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
Agua PrietaMexico108 km (67 mi)16.6 C (61.9 F)371.2 mm (14.6 in)0.73
Mitchell CavernsUnited States607 km (377 mi)17.0 C (62.6 F)259.3 mm (10.2 in)0.74
Tuzigoot NmUnited States344 km (214 mi)16.3 C (61.4 F)310.8 mm (12.2 in)0.79

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 Willcox standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Willcox 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 (2026-10-14).