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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Thunder Basin Threshold Days by Year (USS0020A07S)

12 fixed thresholds counted per year at Thunder Basin (USS0020A07S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thunder Basin Thresholds

  • Thunder Basin: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 2014 with 87.
  • Thunder Basin: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 2014 with 30.
  • Thunder Basin: days with 50 mm (1.97 in) or more of precipitation in 36 years, most in 2015 with 10.
  • Thunder Basin: days with a maximum temperature at or below 0 C (32 F) in 35 years, most in 2012 with 71.
  • 12 fixed thresholds have at least one qualifying day at Thunder Basin.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Thunder Basin Days per year at Thunder Basin with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 1998. 0358101990: 41994: 41996: 21997: 21998: 102000: 12001: 32002: 12003: 42006: 22007: 12008: 12009: 12012: 12013: 12015: 22017: 22018: 22020: 22021: 52022: 52023: 42024: 32026: 119901997200120062009201520202023
Days per year at Thunder Basin with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 1998.
Days at or above 30 C (86 F) per year at Thunder Basin
YearDaysDecade average
199044.4
199444.4
199624.4
199724.4
1998104.4
200011.8
200131.8
200211.8
200341.8
200621.8
200711.8
200811.8
200911.8
201211.6
201311.6
201521.6
201721.6
201821.6
202023.3
202153.3
202253.3
202343.3
202433.3
202613.3
First to last qualifying date each year at Thunder Basin For each year, a bar from the first to the last day at Thunder Basin meeting 30 C (86 F). 1990: 10 July 1990 to 9 August 19901994: 20 July 1994 to 24 July 19941996: 25 August 1996 to 26 August 19961997: 5 August 1997 to 6 August 19971998: 25 July 1998 to 1 September 19982000: 21 July 2000 to 21 July 20002001: 12 August 2001 to 15 August 20012002: 10 July 2002 to 10 July 20022003: 28 July 2003 to 3 September 20032006: 21 July 2006 to 23 July 20062007: 11 July 2007 to 11 July 20072008: 16 August 2008 to 16 August 20082009: 20 August 2009 to 20 August 20092012: 18 August 2012 to 18 August 20122013: 1 July 2013 to 1 July 20132015: 27 June 2015 to 28 June 20152017: 3 August 2017 to 10 August 20172018: 30 July 2018 to 8 August 20182020: 30 July 2020 to 16 August 20202021: 26 June 2021 to 30 July 20212022: 27 July 2022 to 18 August 20222023: 14 August 2023 to 28 August 20232024: 8 July 2024 to 1 August 20242026: 22 July 2026 to 22 July 202619901997200120062009201520202023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Thunder Basin meeting 30 C (86 F).
First to last qualifying date each year at Thunder Basin
YearFirst dateLast date
19901990-07-101990-08-09
19941994-07-201994-07-24
19961996-08-251996-08-26
19971997-08-051997-08-06
19981998-07-251998-09-01
20002000-07-212000-07-21
20012001-08-122001-08-15
20022002-07-102002-07-10
20032003-07-282003-09-03
20062006-07-212006-07-23
20072007-07-112007-07-11
20082008-08-162008-08-16
20092009-08-202009-08-20
20122012-08-182012-08-18
20132013-07-012013-07-01
20152015-06-272015-06-28
20172017-08-032017-08-10
20182018-07-302018-08-08
20202020-07-302020-08-16
20212021-06-262021-07-30
20222022-07-272022-08-18
20232023-08-142023-08-28
20242024-07-082024-08-01
20262026-07-222026-07-22

Every Fixed Threshold

Fixed thresholds at Thunder Basin
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days241019981
35 C (95 F): Days1120211
90 F (32.2 C): Days5319981
0 C (32 F): Ice days (max3571201223
0 C (32 F): Frost days (min323011999129
-10 C (14 F): Days with min3257200012
-20 C (-4 F): Days with min261020173
-30 C (-22 F): Days with min1220242
10 mm (0.39 in): Days with 10 mm or more rain3787201430
25 mm (0.98 in): Days with 25 mm or more rain373020149
50 mm (1.97 in): Days with 50 mm or more rain361020155
100 mm (3.94 in): Days with 100 mm or more rain11319901

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Thunder Basin 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).