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Built 2026-10-19 (19 October 2026)

Snake River Idaho Threshold Days by Year (USR0000ISNA)

11 fixed thresholds counted per year at Snake River Idaho (USR0000ISNA): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Snake River Idaho Thresholds

  • Snake River Idaho: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 2017 with 66.
  • Snake River Idaho: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 2007 with 22.
  • Snake River Idaho: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 2021 with 42.
  • Snake River Idaho: days with a maximum temperature at or below 0 C (32 F) in 28 years, most in 2022 with 60.
  • 11 fixed thresholds have at least one qualifying day at Snake River Idaho.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Snake River Idaho Days per year at Snake River Idaho with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2017. 0204060801997: 241999: 412000: 422001: 512003: 522004: 422005: 402006: 492007: 592008: 442009: 422010: 312011: 472012: 502013: 552014: 452015: 422016: 392017: 662018: 402019: 342020: 402021: 602022: 572023: 412024: 552025: 502026: 511997200120052008201120142017202020232026
Days per year at Snake River Idaho with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2017.
Days at or above 30 C (86 F) per year at Snake River Idaho
YearDaysDecade average
19972432.5
19994132.5
20004246.8
20015146.8
20035246.8
20044246.8
20054046.8
20064946.8
20075946.8
20084446.8
20094246.8
20103144.9
20114744.9
20125044.9
20135544.9
20144544.9
20154244.9
20163944.9
20176644.9
20184044.9
20193444.9
20204050.6
20216050.6
20225750.6
20234150.6
20245550.6
20255050.6
20265150.6
First to last qualifying date each year at Snake River Idaho For each year, a bar from the first to the last day at Snake River Idaho meeting 30 C (86 F). 1997: 4 July 1997 to 9 September 19971999: 24 May 1999 to 16 September 19992000: 4 June 2000 to 14 September 20002001: 24 May 2001 to 24 September 20012003: 24 May 2003 to 6 September 20032004: 22 June 2004 to 31 August 20042005: 21 June 2005 to 8 September 20052006: 16 May 2006 to 12 September 20062007: 1 June 2007 to 13 September 20072008: 16 May 2008 to 19 September 20082009: 29 June 2009 to 25 September 20092010: 28 June 2010 to 2 October 20102011: 22 June 2011 to 24 September 20112012: 15 May 2012 to 14 September 20122013: 27 June 2013 to 11 September 20132014: 23 June 2014 to 16 September 20142015: 7 June 2015 to 12 September 20152016: 4 June 2016 to 29 August 20162017: 7 June 2017 to 12 September 20172018: 5 July 2018 to 6 September 20182019: 12 July 2019 to 5 September 20192020: 29 May 2020 to 11 September 20202021: 1 June 2021 to 9 September 20212022: 27 June 2022 to 27 September 20222023: 30 June 2023 to 28 August 20232024: 6 June 2024 to 8 September 20242025: 28 May 2025 to 5 September 20252026: 15 June 2026 to 27 August 20261997200320072011201520192023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Snake River Idaho meeting 30 C (86 F).
First to last qualifying date each year at Snake River Idaho
YearFirst dateLast date
19971997-07-041997-09-09
19991999-05-241999-09-16
20002000-06-042000-09-14
20012001-05-242001-09-24
20032003-05-242003-09-06
20042004-06-222004-08-31
20052005-06-212005-09-08
20062006-05-162006-09-12
20072007-06-012007-09-13
20082008-05-162008-09-19
20092009-06-292009-09-25
20102010-06-282010-10-02
20112011-06-222011-09-24
20122012-05-152012-09-14
20132013-06-272013-09-11
20142014-06-232014-09-16
20152015-06-072015-09-12
20162016-06-042016-08-29
20172017-06-072017-09-12
20182018-07-052018-09-06
20192019-07-122019-09-05
20202020-05-292020-09-11
20212021-06-012021-09-09
20222022-06-272022-09-27
20232023-06-302023-08-28
20242024-06-062024-09-08
20252025-05-282025-09-05
20262026-06-152026-08-27

Every Fixed Threshold

Fixed thresholds at Snake River Idaho
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2866201751
35 C (95 F): Days282220076
40 C (104 F): Days5220061
90 F (32.2 C): Days2842202132
100 F (37.8 C): Days16620035
0 C (32 F): Ice days (max2860202211
0 C (32 F): Frost days (min28153200849
-10 C (14 F): Days with min241920135
-20 C (-4 F): Days with min1120241
20 C (68 F): Tropical nights (min2836201719
25 C (77 F): Days with min12420241

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Snake River Idaho 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).