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Minidoka Dam Weather Records (USC00105980)

Record envelope, standing records and threshold days for Minidoka Dam (USC00105980), Idaho, United States, with 80 years of record.

Key Facts for Minidoka Dam

  • Minidoka Dam (USC00105980) is a weather station in Idaho, United States at 42.68 latitude and -113.50 longitude, 1,269 m (4,164 ft) above sea level.
  • The station reports from 1947 to 2026, 80 years of record.
  • 1,464 records set at Minidoka Dam still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Minidoka Dam set a daily record low minimum temperature of -0.6 C (30.9 F) on 11 June 2026.

About the Station

  • Location: Idaho, United States, 42.68 latitude, -113.50 longitude.
  • Elevation: 1,269 m (4,164 ft).
  • Period of record: 1947 to 2026, 80 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

14 days at or beyond a record
Daily record high and record low at Minidoka Dam, with 2026 drawn through them The band shows the record high and record low for each calendar day at Minidoka Dam. The lines show the 2026 daily maximum and minimum. 14 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -60-40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Minidoka Dam. The lines show the 2026 daily maximum and minimum. 14 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Minidoka Dam, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.3 C (64.9 F)-40.6 C (-41.1 F)12.2 C (54.0 F)-10.6 C (12.9 F)
Feb20.6 C (69.1 F)-33.9 C (-29.0 F)18.9 C (66.0 F)-11.1 C (12.0 F)
Mar27.8 C (82.0 F)-21.7 C (-7.1 F)27.8 C (82.0 F)-8.3 C (17.1 F)
Apr34.4 C (93.9 F)-11.1 C (12.0 F)28.3 C (82.9 F)-7.8 C (18.0 F)
May37.8 C (100.0 F)-9.4 C (15.1 F)37.2 C (99.0 F)-2.8 C (27.0 F)
Jun40.6 C (105.1 F)-4.4 C (24.1 F)34.4 C (93.9 F)-0.6 C (30.9 F)
Jul42.2 C (108.0 F)-0.6 C (30.9 F)37.2 C (99.0 F)6.7 C (44.1 F)
Aug40.6 C (105.1 F)-0.6 C (30.9 F)n/an/a
Sep39.4 C (102.9 F)-7.2 C (19.0 F)n/an/a
Oct36.1 C (97.0 F)-22.2 C (-8.0 F)n/an/a
Nov26.1 C (79.0 F)-28.3 C (-18.9 F)n/an/a
Dec19.4 C (66.9 F)-32.2 C (-26.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Minidoka Dam by the year they were set 1,464 records at Minidoka Dam still stand. 1949 holds the most, with 40. 0102030401947: 131948: 61949: 401950: 191951: 201952: 191953: 291954: 321955: 351956: 181957: 111958: 171959: 131960: 231961: 141962: 201963: 171964: 151965: 241966: 191967: 91968: 151969: 181970: 131971: 151972: 211973: 81974: 211975: 151976: 81977: 91978: 161979: 111980: 161981: 81982: 171983: 121984: 171985: 301986: 121987: 91988: 231989: 131990: 281991: 131992: 221993: 251994: 261995: 161996: 191997: 41998: 71999: 92000: 142001: 172002: 322003: 362004: 132005: 202006: 172007: 122008: 272009: 112010: 212011: 182012: 242013: 242014: 252015: 362016: 232017: 212018: 142019: 112020: 212021: 232022: 212023: 132024: 132025: 312026: 171947195519631971197919871995200320112019
1,464 records at Minidoka Dam still stand. 1949 holds the most, with 40.
Standing records at Minidoka Dam by the year they were set
Year setStanding records
194713
19486
194940
195019
195120
195219
195329
195432
195535
195618
195711
195817
195913
196023
196114
196220
196317
196415
196524
196619
19679
196815
196918
197013
197115
197221
19738
197421
197515
19768
19779
197816
197911
198016
19818
198217
198312
198417
198530
198612
19879
198823
198913
199028
199113
199222
199325
199426
199516
199619
19974
19987
19999
200014
200117
200232
200336
200413
200520
200617
200712
200827
200911
201021
201118
201224
201324
201425
201536
201623
201721
201814
201911
202021
202123
202221
202313
202413
202531
202617

All-Time Record Progression

6 new records
When Minidoka Dam set new all-time records 6 all-time records were set at Minidoka Dam between 8 August 1990 and 12 October 2008. Each dot is a new record. Record high maximum temperatureRecord low maximum temperatureRecord snow depthRecord daily snowfall8 August 1990: Record high maximum temperature 40.6 C (105.1 F)22 December 1990: Record low maximum temperature -22.8 C (-9.0 F)14 January 1993: Record snow depth 61.0 cm (24.0 in)17 July 1998: Record high maximum temperature 41.1 C (106.0 F)12 July 2002: Record high maximum temperature 42.2 C (108.0 F)12 October 2008: Record daily snowfall 35.6 cm (14.0 in)1990199520002005
6 all-time records were set at Minidoka Dam between 8 August 1990 and 12 October 2008. Each dot is a new record.
When Minidoka Dam set new all-time records
DateKindDetail
1990-08-08Record high maximum temperatureRecord high maximum temperature 40.6 C (105.1 F)
1990-12-22Record low maximum temperatureRecord low maximum temperature -22.8 C (-9.0 F)
1993-01-14Record snow depthRecord snow depth 61.0 cm (24.0 in)
1998-07-17Record high maximum temperatureRecord high maximum temperature 41.1 C (106.0 F)
2002-07-12Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
2008-10-12Record daily snowfallRecord daily snowfall 35.6 cm (14.0 in)

Wettest Day of Each Month

Sep: 38.6 mm (1.5 in)
Record daily precipitation for each month at Minidoka Dam The wettest day on record for each calendar month at Minidoka Dam. The most was 38.6 mm (1.5 in) on 22 September 1998. 010203040 Jan: 29.0 mm (1.1 in), 31 January 1963 Jan Feb: 20.3 mm (0.8 in), 21 February 2017 Feb Mar: 31.8 mm (1.3 in), 2 March 2024 Mar Apr: 31.8 mm (1.3 in), 20 April 2005 Apr May: 33.0 mm (1.3 in), 8 May 2016 May Jun: 26.9 mm (1.1 in), 7 June 2009 Jun Jul: 28.7 mm (1.1 in), 8 July 1950 Jul Aug: 33.5 mm (1.3 in), 28 August 1991 Aug Sep: 38.6 mm (1.5 in), 22 September 1998 Sep Oct: 29.0 mm (1.1 in), 26 October 1975 Oct Nov: 26.7 mm (1.1 in), 24 November 2023 Nov Dec: 38.6 mm (1.5 in), 23 December 1964 Dec
The wettest day on record for each calendar month at Minidoka Dam. The most was 38.6 mm (1.5 in) on 22 September 1998.
Record daily precipitation for each month at Minidoka Dam
MonthRecord daily precipitation (mm)Date
Jan29.0 mm (1.1 in)31 January 1963
Feb20.3 mm (0.8 in)21 February 2017
Mar31.8 mm (1.3 in)2 March 2024
Apr31.8 mm (1.3 in)20 April 2005
May33.0 mm (1.3 in)8 May 2016
Jun26.9 mm (1.1 in)7 June 2009
Jul28.7 mm (1.1 in)8 July 1950
Aug33.5 mm (1.3 in)28 August 1991
Sep38.6 mm (1.5 in)22 September 1998
Oct29.0 mm (1.1 in)26 October 1975
Nov26.7 mm (1.1 in)24 November 2023
Dec38.6 mm (1.5 in)23 December 1964

Period of Record Coverage

1947 to 2026
Days with data per year at Minidoka Dam 80 years of record at Minidoka Dam, 1947 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1947, 1948, 1987, 1999, 2009, 2026. 1947: 183 of 365 days1948: 153 of 366 days1949: 363 of 365 days1950: 365 of 365 days1951: 364 of 365 days1952: 363 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 360 of 365 days1956: 362 of 366 days1957: 363 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 356 of 365 days1963: 363 of 365 days1964: 364 of 366 days1965: 364 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 334 of 366 days1977: 363 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 365 of 366 days1981: 364 of 365 days1982: 352 of 365 days1983: 354 of 365 days1984: 349 of 366 days1985: 364 of 365 days1986: 333 of 365 days1987: 214 of 365 days1988: 366 of 366 days1989: 364 of 365 days1990: 365 of 365 days1991: 362 of 365 days1992: 363 of 366 days1993: 361 of 365 days1994: 355 of 365 days1995: 359 of 365 days1996: 360 of 366 days1997: 332 of 365 days1998: 358 of 365 days1999: 215 of 365 days2000: 362 of 366 days2001: 364 of 365 days2002: 351 of 365 days2003: 360 of 365 days2004: 355 of 366 days2005: 361 of 365 days2006: 364 of 365 days2007: 332 of 365 days2008: 364 of 366 days2009: 325 of 365 days2010: 363 of 365 days2011: 365 of 365 days2012: 365 of 366 days2013: 357 of 365 days2014: 365 of 365 days2015: 359 of 365 days2016: 358 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 364 of 365 days2023: 363 of 365 days2024: 366 of 366 days2025: 364 of 365 days2026: 186 of 365 days19501960197019801990200020102020
80 years of record at Minidoka Dam, 1947 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1947, 1948, 1987, 1999, 2009, 2026.
Days with data per year at Minidoka Dam
YearDays with dataShare of yearComplete
194718350%No
194815342%No
194936399%Yes
1950365100%Yes
1951364100%Yes
195236399%Yes
1953365100%Yes
1954365100%Yes
195536099%Yes
195636299%Yes
195736399%Yes
1958365100%Yes
1959364100%Yes
1960366100%Yes
1961365100%Yes
196235698%Yes
196336399%Yes
196436499%Yes
1965364100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
197633491%Yes
197736399%Yes
1978365100%Yes
1979364100%Yes
1980365100%Yes
1981364100%Yes
198235296%Yes
198335497%Yes
198434995%Yes
1985364100%Yes
198633391%Yes
198721459%No
1988366100%Yes
1989364100%Yes
1990365100%Yes
199136299%Yes
199236399%Yes
199336199%Yes
199435597%Yes
199535998%Yes
199636098%Yes
199733291%Yes
199835898%Yes
199921559%No
200036299%Yes
2001364100%Yes
200235196%Yes
200336099%Yes
200435597%Yes
200536199%Yes
2006364100%Yes
200733291%Yes
200836499%Yes
200932589%No
201036399%Yes
2011365100%Yes
2012365100%Yes
201335798%Yes
2014365100%Yes
201535998%Yes
201635898%Yes
2017364100%Yes
2018365100%Yes
2019364100%Yes
2020366100%Yes
2021365100%Yes
2022364100%Yes
202336399%Yes
2024366100%Yes
2025364100%Yes
202618651%No

Latest Records

20
Latest records at Minidoka Dam
DateStationRecordValueBeat old record byOld record stoodSignificance
11 June 2026Minidoka Dam, USdaily low min-0.6 C (30.9 F)2.3 C (4.1 F)17 years19 of 100 (Routine)
26 May 2026Minidoka Dam, USdaily high max34.4 C (93.9 F)0.5 C (0.9 F)23 years14 of 100 (Routine)
20 May 2026Minidoka Dam, USdaily low min (Tie)-1.7 C (28.9 F)tie51 years5 of 100 (Routine)
17 May 2026Minidoka Dam, USdaily low max10.6 C (51.1 F)0.5 C (0.9 F)55 years24 of 100 (Routine)
12 May 2026Minidoka Dam, USdaily high max37.2 C (99.0 F)5.5 C (9.9 F)19 years22 of 100 (Routine)
29 March 2026Minidoka Dam, USdaily high max23.9 C (75.0 F)0.6 C (1.1 F)48 years23 of 100 (Routine)
26 March 2026Minidoka Dam, USdaily high max25.6 C (78.1 F)0.6 C (1.1 F)65 years28 of 100 (Routine)
25 March 2026Minidoka Dam, USdaily high max23.9 C (75.0 F)1.1 C (2.0 F)13 years14 of 100 (Routine)
21 March 2026Minidoka Dam, USmonthly high max27.8 C (82.0 F)1.1 C (2.0 F)0 years20 of 100 (Routine)
20 March 2026Minidoka Dam, USmonthly high max (Tie)26.7 C (80.1 F)tie0 years4 of 100 (Routine)
19 March 2026Minidoka Dam, USdaily high max26.1 C (79.0 F)2.8 C (5.0 F)28 years21 of 100 (Routine)
3 March 2026Minidoka Dam, USdaily high min4.4 C (39.9 F)0.5 C (0.9 F)12 years12 of 100 (Routine)
25 February 2026Minidoka Dam, USdaily high min3.9 C (39.0 F)1.7 C (3.1 F)72 years32 of 100 (Routine)
25 February 2026Minidoka Dam, USdaily rain9.4 mm (0.37 in)1.8 mm (0.07 in)56 years20 of 100 (Routine)
23 February 2026Minidoka Dam, USdaily high max (Tie)15.0 C (59.0 F)tie72 years7 of 100 (Routine)
18 February 2026Minidoka Dam, USdaily snowfall6.4 cm (2.5 in)1.3 cm (0.5 in)70 years33 of 100 (Routine)
15 February 2026Minidoka Dam, USdaily high max (Tie)13.9 C (57.0 F)tie35 years4 of 100 (Routine)
6 February 2026Minidoka Dam, USdaily high max15.6 C (60.1 F)0.6 C (1.1 F)19 years14 of 100 (Routine)
5 January 2026Minidoka Dam, USdaily high min2.2 C (36.0 F)2.2 C (4.0 F)70 years32 of 100 (Routine)
4 January 2026Minidoka Dam, USdaily high min1.7 C (35.1 F)1.1 C (2.0 F)0 years9 of 100 (Routine)

Climate Trend

69 complete years, 1949 to 2025
Annual mean temperature at Minidoka Dam as warming stripes, 1949 to 2025 One stripe for each of 69 complete years at Minidoka Dam, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1985, at 6.2 C (43.2 F), and the warmest was 2025, at 10.7 C (51.2 F). The strongest colour marks a difference of 2.8 C (5.0 F). 1949: 8.3 C, -0.7 C from the station mean1950: 9.2 C, +0.2 C from the station mean1951: 8.6 C, -0.5 C from the station mean1952: 8.5 C, -0.5 C from the station mean1953: 9.8 C, +0.8 C from the station mean1954: 9.4 C, +0.4 C from the station mean1955: 7.8 C, -1.3 C from the station mean1956: 9.1 C, +0.1 C from the station mean1957: 9.3 C, +0.3 C from the station mean1958: 10.3 C, +1.3 C from the station mean1959: 9.5 C, +0.5 C from the station mean1960: 9.2 C, +0.1 C from the station mean1961: 9.6 C, +0.6 C from the station mean1962: 8.6 C, -0.4 C from the station mean1963: 9.0 C, 0.0 C from the station mean1964: 7.6 C, -1.4 C from the station mean1965: 9.0 C, 0.0 C from the station mean1966: 9.5 C, +0.5 C from the station mean1967: 9.6 C, +0.6 C from the station mean1968: 8.6 C, -0.4 C from the station mean1969: 8.7 C, -0.3 C from the station mean1970: 9.1 C, +0.1 C from the station mean1971: 8.4 C, -0.6 C from the station mean1972: 8.4 C, -0.6 C from the station mean1973: 9.0 C, 0.0 C from the station mean1974: 9.1 C, +0.1 C from the station mean1975: 8.3 C, -0.7 C from the station mean1977: 9.2 C, +0.2 C from the station mean1978: 9.1 C, +0.1 C from the station mean1979: 8.6 C, -0.4 C from the station mean1980: 9.1 C, +0.1 C from the station mean1981: 9.9 C, +0.9 C from the station mean1982: 7.7 C, -1.3 C from the station mean1983: 8.9 C, -0.1 C from the station mean1984: 7.2 C, -1.8 C from the station mean1985: 6.2 C, -2.8 C from the station mean1988: 9.5 C, +0.5 C from the station mean1989: 8.7 C, -0.3 C from the station mean1990: 9.5 C, +0.5 C from the station mean1991: 9.0 C, 0.0 C from the station mean1992: 10.1 C, +1.1 C from the station mean1993: 7.3 C, -1.7 C from the station mean1994: 9.9 C, +0.9 C from the station mean1995: 9.8 C, +0.8 C from the station mean1996: 9.2 C, +0.2 C from the station mean1998: 9.3 C, +0.3 C from the station mean2000: 9.2 C, +0.2 C from the station mean2001: 9.0 C, 0.0 C from the station mean2002: 8.0 C, -1.0 C from the station mean2003: 9.9 C, +0.9 C from the station mean2004: 8.5 C, -0.5 C from the station mean2005: 8.1 C, -0.9 C from the station mean2006: 9.2 C, +0.2 C from the station mean2008: 8.2 C, -0.8 C from the station mean2010: 8.7 C, -0.4 C from the station mean2011: 8.5 C, -0.5 C from the station mean2012: 10.3 C, +1.3 C from the station mean2013: 9.1 C, +0.1 C from the station mean2014: 10.0 C, +1.0 C from the station mean2016: 10.1 C, +1.1 C from the station mean2017: 9.1 C, +0.1 C from the station mean2018: 9.7 C, +0.7 C from the station mean2019: 8.5 C, -0.5 C from the station mean2020: 9.4 C, +0.4 C from the station mean2021: 10.1 C, +1.1 C from the station mean2022: 8.2 C, -0.8 C from the station mean2023: 9.1 C, 0.0 C from the station mean2024: 10.2 C, +1.2 C from the station mean2025: 10.7 C, +1.7 C from the station mean19491960197019801990200020102020
One stripe for each of 69 complete years at Minidoka Dam, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1985, at 6.2 C (43.2 F), and the warmest was 2025, at 10.7 C (51.2 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Minidoka Dam as warming stripes, 1949 to 2025
YearAnnual mean temperatureDifference from the station mean
19498.3 C-0.73 C
19509.2 C+0.24 C
19518.6 C-0.45 C
19528.5 C-0.49 C
19539.8 C+0.78 C
19549.4 C+0.39 C
19557.8 C-1.25 C
19569.1 C+0.08 C
19579.3 C+0.30 C
195810.3 C+1.34 C
19599.5 C+0.46 C
19609.2 C+0.15 C
19619.6 C+0.59 C
19628.6 C-0.43 C
19639.0 C-0.03 C
19647.6 C-1.37 C
19659.0 C+0.03 C
19669.5 C+0.49 C
19679.6 C+0.64 C
19688.6 C-0.42 C
19698.7 C-0.26 C
19709.1 C+0.07 C
19718.4 C-0.58 C
19728.4 C-0.62 C
19739.0 C-0.02 C
19749.1 C+0.13 C
19758.3 C-0.74 C
19779.2 C+0.22 C
19789.1 C+0.06 C
19798.6 C-0.40 C
19809.1 C+0.11 C
19819.9 C+0.91 C
19827.7 C-1.34 C
19838.9 C-0.08 C
19847.2 C-1.77 C
19856.2 C-2.76 C
19889.5 C+0.47 C
19898.7 C-0.33 C
19909.5 C+0.46 C
19919.0 C0.00 C
199210.1 C+1.08 C
19937.3 C-1.70 C
19949.9 C+0.91 C
19959.8 C+0.79 C
19969.2 C+0.23 C
19989.3 C+0.31 C
20009.2 C+0.22 C
20019.0 C+0.02 C
20028.0 C-0.99 C
20039.9 C+0.87 C
20048.5 C-0.51 C
20058.1 C-0.91 C
20069.2 C+0.24 C
20088.2 C-0.84 C
20108.7 C-0.35 C
20118.5 C-0.53 C
201210.3 C+1.32 C
20139.1 C+0.12 C
201410.0 C+1.01 C
201610.1 C+1.11 C
20179.1 C+0.14 C
20189.7 C+0.66 C
20198.5 C-0.48 C
20209.4 C+0.42 C
202110.1 C+1.10 C
20228.2 C-0.78 C
20239.1 C+0.05 C
202410.2 C+1.18 C
202510.7 C+1.69 C

The fitted trend in annual mean temperature here over 1949 to 2025 is 0.07 C (-0.02 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.12 F (-0.03 to 0.27) per decade. The slope is a straight line fitted to 69 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Minidoka Dam
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.07 C (-0.02 to 0.15) per decade0.12 F (-0.03 to 0.27) per decade1949 to 202569Not clearly different from zero
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.6) per decade1949 to 202569Rise
Mean daily minimum-0.10 C (-0.19 to -0.02) per decade-0.19 F (-0.34 to -0.04) per decade1949 to 202569Fall

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

1947 to 2026
Yearly extremes at Minidoka Dam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)200237.8 C (100.0 F)80
Coldest night (TNn)-40.6 C (-41.1 F)1962-22.8 C (-9.0 F)80
Wettest day (Rx1day)38.6 mm (1.5 in)196418.4 mm (0.7 in)80
Wettest five days (Rx5day)82.5 mm (3.2 in)196429.0 mm (1.1 in)80
Longest dry spell (CDD)128 days198846 days80

Hottest day (TXx)

Hottest day (TXx) at Minidoka Dam by year The hottest day of the year at Minidoka Dam, 1947 to 2026. The record is 42.2 C (108.0 F) in 2002, marked on the chart; the median year is 37.8 C (100.0 F). 32.53537.54042.51960198020002020Record: 42.2 C (108.0 F) in 2002
The hottest day of the year at Minidoka Dam, 1947 to 2026. The record is 42.2 C (108.0 F) in 2002, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Minidoka Dam by year
YearHottest day (TXx)
194736.1 C (97.0 F)
194835.6 C (96.1 F)
194937.8 C (100.0 F)
195035.6 C (96.1 F)
195137.8 C (100.0 F)
195236.1 C (97.0 F)
195336.1 C (97.0 F)
195438.3 C (100.9 F)
195537.2 C (99.0 F)
195636.7 C (98.1 F)
195736.1 C (97.0 F)
195836.7 C (98.1 F)
195937.2 C (99.0 F)
196040.0 C (104.0 F)
196136.7 C (98.1 F)
196238.3 C (100.9 F)
196337.2 C (99.0 F)
196437.8 C (100.0 F)
196536.1 C (97.0 F)
196636.1 C (97.0 F)
196736.1 C (97.0 F)
196837.2 C (99.0 F)
196937.8 C (100.0 F)
197036.7 C (98.1 F)
197137.2 C (99.0 F)
197236.7 C (98.1 F)
197337.8 C (100.0 F)
197436.7 C (98.1 F)
197536.7 C (98.1 F)
197636.7 C (98.1 F)
197735.0 C (95.0 F)
197836.1 C (97.0 F)
197936.7 C (98.1 F)
198037.2 C (99.0 F)
198138.3 C (100.9 F)
198235.0 C (95.0 F)
198337.2 C (99.0 F)
198435.0 C (95.0 F)
198536.7 C (98.1 F)
198636.7 C (98.1 F)
198736.7 C (98.1 F)
198837.2 C (99.0 F)
198937.8 C (100.0 F)
199040.6 C (105.1 F)
199137.8 C (100.0 F)
199238.3 C (100.9 F)
199333.9 C (93.0 F)
199438.9 C (102.0 F)
199537.2 C (99.0 F)
199638.9 C (102.0 F)
199737.2 C (99.0 F)
199841.1 C (106.0 F)
199933.3 C (91.9 F)
200040.6 C (105.1 F)
200137.8 C (100.0 F)
200242.2 C (108.0 F)
200341.7 C (107.1 F)
200437.8 C (100.0 F)
200537.8 C (100.0 F)
200638.9 C (102.0 F)
200738.3 C (100.9 F)
200839.4 C (102.9 F)
200937.8 C (100.0 F)
201037.8 C (100.0 F)
201137.8 C (100.0 F)
201240.0 C (104.0 F)
201341.1 C (106.0 F)
201440.6 C (105.1 F)
201540.0 C (104.0 F)
201639.4 C (102.9 F)
201737.8 C (100.0 F)
201839.4 C (102.9 F)
201937.8 C (100.0 F)
202040.6 C (105.1 F)
202138.9 C (102.0 F)
202239.4 C (102.9 F)
202338.3 C (100.9 F)
202440.0 C (104.0 F)
202539.4 C (102.9 F)
202637.2 C (99.0 F)

Coldest night (TNn)

Coldest night (TNn) at Minidoka Dam by year The coldest night of the year at Minidoka Dam, 1947 to 2026. The record is -40.6 C (-41.1 F) in 1962, marked on the chart; the median year is -22.8 C (-9.0 F). -50-40-30-20-1001960198020002020Record: -40.6 C (-41.1 F) in 1962
The coldest night of the year at Minidoka Dam, 1947 to 2026. The record is -40.6 C (-41.1 F) in 1962, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Minidoka Dam by year
YearColdest night (TNn)
1947-3.9 C (25.0 F)
1948-21.1 C (-6.0 F)
1949-35.0 C (-31.0 F)
1950-26.1 C (-15.0 F)
1951-23.9 C (-11.0 F)
1952-24.4 C (-11.9 F)
1953-16.1 C (3.0 F)
1954-21.1 C (-6.0 F)
1955-23.3 C (-9.9 F)
1956-26.7 C (-16.1 F)
1957-28.9 C (-20.0 F)
1958-17.2 C (1.0 F)
1959-20.6 C (-5.1 F)
1960-31.7 C (-25.1 F)
1961-19.4 C (-2.9 F)
1962-40.6 C (-41.1 F)
1963-32.8 C (-27.0 F)
1964-23.9 C (-11.0 F)
1965-18.3 C (-0.9 F)
1966-18.3 C (-0.9 F)
1967-23.3 C (-9.9 F)
1968-22.8 C (-9.0 F)
1969-20.0 C (-4.0 F)
1970-18.9 C (-2.0 F)
1971-23.3 C (-9.9 F)
1972-31.7 C (-25.1 F)
1973-22.8 C (-9.0 F)
1974-26.1 C (-15.0 F)
1975-22.8 C (-9.0 F)
1976-20.0 C (-4.0 F)
1977-23.3 C (-9.9 F)
1978-23.3 C (-9.9 F)
1979-32.2 C (-26.0 F)
1980-24.4 C (-11.9 F)
1981-16.7 C (1.9 F)
1982-29.4 C (-20.9 F)
1983-28.3 C (-18.9 F)
1984-30.0 C (-22.0 F)
1985-33.9 C (-29.0 F)
1986-21.1 C (-6.0 F)
1987-20.6 C (-5.1 F)
1988-23.9 C (-11.0 F)
1989-27.8 C (-18.0 F)
1990-32.2 C (-26.0 F)
1991-21.7 C (-7.1 F)
1992-23.3 C (-9.9 F)
1993-23.3 C (-9.9 F)
1994-18.3 C (-0.9 F)
1995-16.7 C (1.9 F)
1996-26.7 C (-16.1 F)
1997-22.2 C (-8.0 F)
1998-25.0 C (-13.0 F)
1999-18.9 C (-2.0 F)
2000-15.0 C (5.0 F)
2001-18.3 C (-0.9 F)
2002-21.1 C (-6.0 F)
2003-15.6 C (3.9 F)
2004-21.7 C (-7.1 F)
2005-25.0 C (-13.0 F)
2006-19.4 C (-2.9 F)
2007-26.1 C (-15.0 F)
2008-21.7 C (-7.1 F)
2009-25.0 C (-13.0 F)
2010-28.3 C (-18.9 F)
2011-21.1 C (-6.0 F)
2012-15.0 C (5.0 F)
2013-27.8 C (-18.0 F)
2014-24.4 C (-11.9 F)
2015-20.0 C (-4.0 F)
2016-18.9 C (-2.0 F)
2017-28.9 C (-20.0 F)
2018-16.7 C (1.9 F)
2019-22.2 C (-8.0 F)
2020-22.2 C (-8.0 F)
2021-13.9 C (7.0 F)
2022-22.8 C (-9.0 F)
2023-22.8 C (-9.0 F)
2024-23.9 C (-11.0 F)
2025-15.6 C (3.9 F)
2026-11.1 C (12.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Minidoka Dam by year The wettest day of the year at Minidoka Dam, 1947 to 2026. The record is 38.6 mm (1.5 in) in 1964, marked on the chart; the median year is 18.4 mm (0.7 in). 0102030401960198020002020Record: 38.6 mm (1.5 in) in 1964
The wettest day of the year at Minidoka Dam, 1947 to 2026. The record is 38.6 mm (1.5 in) in 1964, marked on the chart; the median year is 18.4 mm (0.7 in).
Wettest day (Rx1day) at Minidoka Dam by year
YearWettest day (Rx1day)
19479.7 mm (0.38 in)
194813.7 mm (0.5 in)
194923.4 mm (0.9 in)
195028.7 mm (1.1 in)
195114.5 mm (0.6 in)
195211.9 mm (0.5 in)
195321.3 mm (0.8 in)
195415.2 mm (0.6 in)
195514.0 mm (0.6 in)
195613.2 mm (0.5 in)
195716.8 mm (0.7 in)
195818.3 mm (0.7 in)
195914.5 mm (0.6 in)
196019.3 mm (0.8 in)
196122.1 mm (0.9 in)
196210.2 mm (0.4 in)
196329.0 mm (1.1 in)
196438.6 mm (1.5 in)
196515.2 mm (0.6 in)
196610.7 mm (0.4 in)
196721.1 mm (0.8 in)
196822.6 mm (0.9 in)
196918.8 mm (0.7 in)
197019.3 mm (0.8 in)
197122.9 mm (0.9 in)
197224.4 mm (1.0 in)
197314.5 mm (0.6 in)
197410.9 mm (0.4 in)
197529.0 mm (1.1 in)
197613.7 mm (0.5 in)
197718.5 mm (0.7 in)
197817.5 mm (0.7 in)
197922.4 mm (0.9 in)
198018.3 mm (0.7 in)
198122.9 mm (0.9 in)
198216.5 mm (0.6 in)
198321.6 mm (0.9 in)
198414.2 mm (0.6 in)
198514.5 mm (0.6 in)
198616.8 mm (0.7 in)
19878.6 mm (0.34 in)
198815.0 mm (0.6 in)
198911.4 mm (0.4 in)
199015.2 mm (0.6 in)
199133.5 mm (1.3 in)
199215.5 mm (0.6 in)
199321.8 mm (0.9 in)
199415.2 mm (0.6 in)
199523.9 mm (0.9 in)
199622.1 mm (0.9 in)
199717.5 mm (0.7 in)
199838.6 mm (1.5 in)
199919.3 mm (0.8 in)
200015.2 mm (0.6 in)
200125.4 mm (1.0 in)
200213.2 mm (0.5 in)
200314.7 mm (0.6 in)
200418.3 mm (0.7 in)
200531.8 mm (1.3 in)
200615.7 mm (0.6 in)
200715.2 mm (0.6 in)
200821.6 mm (0.9 in)
200926.9 mm (1.1 in)
201014.0 mm (0.6 in)
201122.6 mm (0.9 in)
201234.3 mm (1.4 in)
20137.6 mm (0.30 in)
201420.8 mm (0.8 in)
201530.2 mm (1.2 in)
201633.0 mm (1.3 in)
201724.9 mm (1.0 in)
201825.9 mm (1.0 in)
201912.7 mm (0.5 in)
202019.1 mm (0.8 in)
202121.6 mm (0.9 in)
202216.3 mm (0.6 in)
202326.7 mm (1.1 in)
202431.8 mm (1.3 in)
202521.1 mm (0.8 in)
20269.4 mm (0.37 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Minidoka Dam by year The wettest five days of the year at Minidoka Dam, 1947 to 2026. The record is 82.5 mm (3.2 in) in 1964, marked on the chart; the median year is 29.0 mm (1.1 in). 0204060801001960198020002020Record: 82.5 mm (3.2 in) in 1964
The wettest five days of the year at Minidoka Dam, 1947 to 2026. The record is 82.5 mm (3.2 in) in 1964, marked on the chart; the median year is 29.0 mm (1.1 in).
Wettest five days (Rx5day) at Minidoka Dam by year
YearWettest five days (Rx5day)
194725.9 mm (1.0 in)
194823.4 mm (0.9 in)
194937.8 mm (1.5 in)
195036.8 mm (1.4 in)
195130.0 mm (1.2 in)
195217.6 mm (0.7 in)
195330.6 mm (1.2 in)
195416.3 mm (0.6 in)
195523.4 mm (0.9 in)
195630.8 mm (1.2 in)
195726.0 mm (1.0 in)
195827.7 mm (1.1 in)
195924.5 mm (1.0 in)
196020.3 mm (0.8 in)
196146.0 mm (1.8 in)
196222.0 mm (0.9 in)
196361.0 mm (2.4 in)
196482.5 mm (3.2 in)
196528.4 mm (1.1 in)
196619.4 mm (0.8 in)
196730.9 mm (1.2 in)
196859.3 mm (2.3 in)
196926.7 mm (1.1 in)
197033.8 mm (1.3 in)
197157.7 mm (2.3 in)
197240.9 mm (1.6 in)
197324.7 mm (1.0 in)
197418.5 mm (0.7 in)
197531.6 mm (1.2 in)
197628.7 mm (1.1 in)
197729.4 mm (1.2 in)
197826.4 mm (1.0 in)
197928.5 mm (1.1 in)
198055.6 mm (2.2 in)
198126.5 mm (1.0 in)
198224.9 mm (1.0 in)
198341.7 mm (1.6 in)
198419.4 mm (0.8 in)
198529.7 mm (1.2 in)
198646.2 mm (1.8 in)
198716.2 mm (0.6 in)
198823.2 mm (0.9 in)
198920.3 mm (0.8 in)
199022.1 mm (0.9 in)
199134.0 mm (1.3 in)
199217.3 mm (0.7 in)
199333.7 mm (1.3 in)
199423.8 mm (0.9 in)
199540.0 mm (1.6 in)
199635.9 mm (1.4 in)
199724.6 mm (1.0 in)
199847.3 mm (1.9 in)
199935.9 mm (1.4 in)
200029.2 mm (1.1 in)
200127.7 mm (1.1 in)
200213.9 mm (0.5 in)
200322.6 mm (0.9 in)
200421.4 mm (0.8 in)
200544.5 mm (1.8 in)
200649.0 mm (1.9 in)
200721.8 mm (0.9 in)
200821.6 mm (0.9 in)
200943.7 mm (1.7 in)
201041.2 mm (1.6 in)
201127.1 mm (1.1 in)
201246.7 mm (1.8 in)
201314.8 mm (0.6 in)
201440.2 mm (1.6 in)
201563.3 mm (2.5 in)
201638.6 mm (1.5 in)
201730.8 mm (1.2 in)
201830.0 mm (1.2 in)
201928.5 mm (1.1 in)
202040.2 mm (1.6 in)
202127.8 mm (1.1 in)
202222.9 mm (0.9 in)
202339.0 mm (1.5 in)
202445.3 mm (1.8 in)
202530.5 mm (1.2 in)
202616.8 mm (0.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Minidoka Dam by year The longest dry spell of the year at Minidoka Dam, 1947 to 2026. The record is 128 days in 1988, marked on the chart; the median year is 46 days. 0501001501960198020002020Record: 128 days in 1988
The longest dry spell of the year at Minidoka Dam, 1947 to 2026. The record is 128 days in 1988, marked on the chart; the median year is 46 days.
Longest dry spell (CDD) at Minidoka Dam by year
YearLongest dry spell (CDD)
194736 days
194848 days
194936 days
195033 days
195149 days
1952116 days
195359 days
195451 days
195523 days
195638 days
195775 days
195842 days
195966 days
196050 days
196134 days
196246 days
196339 days
196439 days
196556 days
196650 days
196750 days
196827 days
196943 days
197033 days
197153 days
197236 days
197335 days
197456 days
197547 days
197661 days
197751 days
197831 days
197935 days
198028 days
198145 days
198220 days
198336 days
198437 days
198540 days
198647 days
198756 days
1988128 days
198941 days
199065 days
199155 days
199255 days
199346 days
199463 days
199528 days
199659 days
199729 days
199826 days
199936 days
200051 days
200160 days
200270 days
200384 days
200426 days
200539 days
200691 days
200733 days
2008115 days
200925 days
201041 days
201142 days
201286 days
201365 days
201440 days
201533 days
2016106 days
201768 days
2018108 days
201939 days
202056 days
202162 days
202233 days
202340 days
202443 days
202552 days
202639 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

69 years with a frost

Across 69 years with a frost, the median last spring frost at Minidoka Dam falls on 14 May and the median first autumn frost on 1 October, which leaves a median of 136 days between them.

In 1991 to 2025 the median growing season was 135 days. That is 3 days fewer than in 1949 to 1979.

Fitted over all years, the growing season changes by -2.3 days per decade at this station.

Frost dates and growing season at Minidoka Dam
MeasureMedian, all yearsEarliest period (1949 to 1979)Recent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost14 May15 May17 May2 days later+1.7 days per decade
First autumn frost1 October2 October2 Octoberno change-0.6 days per decade
Growing days136 days138 days135 days3 days fewer-2.3 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

73 years, 1949 to 2025

A day with at least 18.8 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 42.5 mm (1.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Minidoka Dam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years18.8 mm (0.7 in)
5 years25.1 mm (1.0 in)
10 years29.2 mm (1.1 in)
25 years34.5 mm (1.4 in)
50 years38.5 mm (1.5 in)
100 years42.5 mm (1.7 in)Longer than the 73 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 73 years of values from 1949 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: 38.6 mm (1.5 in) in 1964; 38.6 mm (1.5 in) in 1998; 34.3 mm (1.4 in) in 2012.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Minidoka Dam had a mean temperature of 9.4 C (49.0 F) and 263.7 mm (10.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Modena (United States, 544 km away), Salina (United States, 436 km away) and Boulder (United States, 559 km away).

Climate twins of Minidoka Dam: 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
ModenaUnited States544 km (338 mi)9.5 C (49.0 F)253.3 mm (10.0 in)0.60
SalinaUnited States436 km (271 mi)9.6 C (49.2 F)257.0 mm (10.1 in)0.62
BoulderUnited States559 km (347 mi)9.2 C (48.6 F)269.1 mm (10.6 in)0.62

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 Minidoka Dam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Minidoka Dam 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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