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Built 2026-10-19 (19 October 2026)

Thermopolis 9NE Threshold Days by Year (USC00488884)

17 fixed thresholds counted per year at Thermopolis 9NE (USC00488884): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thermopolis 9NE Thresholds

  • Thermopolis 9NE: days with 10 cm (3.9 in) or more of snowfall in 33 years, most in 2002 with 13.
  • Thermopolis 9NE: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1997 with 17.
  • Thermopolis 9NE: days with 25 mm (0.98 in) or more of precipitation in 22 years, most in 1998 with 5.
  • Thermopolis 9NE: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 2022 with 73.
  • 17 fixed thresholds have at least one qualifying day at Thermopolis 9NE.
19 years with a qualifying day
Days at or above 30 C (86 F) per year at Thermopolis 9NE Days per year at Thermopolis 9NE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 2022. 0204060802007: 652009: 412010: 512011: 642012: 712013: 692014: 382015: 572016: 622017: 532018: 542019: 482020: 622021: 712022: 732023: 442024: 632025: 702026: 692007201020122014201620182020202220242026
Days per year at Thermopolis 9NE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 2022.
Days at or above 30 C (86 F) per year at Thermopolis 9NE
YearDaysDecade average
20076553
20094153
20105156.7
20116456.7
20127156.7
20136956.7
20143856.7
20155756.7
20166256.7
20175356.7
20185456.7
20194856.7
20206264.6
20217164.6
20227364.6
20234464.6
20246364.6
20257064.6
20266964.6
First to last qualifying date each year at Thermopolis 9NE For each year, a bar from the first to the last day at Thermopolis 9NE meeting 30 C (86 F). 2007: 13 May 2007 to 23 September 20072009: 19 May 2009 to 27 September 20092010: 22 June 2010 to 4 October 20102011: 7 June 2011 to 2 October 20112012: 24 April 2012 to 16 September 20122013: 14 May 2013 to 8 September 20132014: 29 May 2014 to 9 September 20142015: 10 June 2015 to 27 September 20152016: 6 June 2016 to 12 September 20162017: 5 June 2017 to 14 September 20172018: 26 May 2018 to 17 September 20182019: 27 June 2019 to 16 September 20192020: 19 May 2020 to 25 September 20202021: 4 June 2021 to 28 September 20212022: 12 June 2022 to 28 September 20222023: 2 July 2023 to 4 September 20232024: 7 June 2024 to 30 September 20242025: 2 June 2025 to 4 October 20252026: 22 March 2026 to 6 October 20262007201120142017202020232026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Thermopolis 9NE meeting 30 C (86 F).
First to last qualifying date each year at Thermopolis 9NE
YearFirst dateLast date
20072007-05-132007-09-23
20092009-05-192009-09-27
20102010-06-222010-10-04
20112011-06-072011-10-02
20122012-04-242012-09-16
20132013-05-142013-09-08
20142014-05-292014-09-09
20152015-06-102015-09-27
20162016-06-062016-09-12
20172017-06-052017-09-14
20182018-05-262018-09-17
20192019-06-272019-09-16
20202020-05-192020-09-25
20212021-06-042021-09-28
20222022-06-122022-09-28
20232023-07-022023-09-04
20242024-06-072024-09-30
20252025-06-022025-10-04
20262026-03-222026-10-06

Every Fixed Threshold

Fixed thresholds at Thermopolis 9NE
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1973202269
35 C (95 F): Days1924200719
40 C (104 F): Days10n/a1
90 F (32.2 C): Days1954202246
100 F (37.8 C): Days6320223
0 C (32 F): Ice days (max197520198
0 C (32 F): Frost days (min192232020127
-10 C (14 F): Days with min19119202246
-20 C (-4 F): Days with min194620078
-30 C (-22 F): Days with min15920147
-40 C (-40 F): Days with min2220221
10 mm (0.39 in): Days with 10 mm or more rain321719975
25 mm (0.98 in): Days with 25 mm or more rain22519981
50 mm (1.97 in): Days with 50 mm or more rain1119971
100 mm (3.94 in): Days with 100 mm or more rain1119971
10 cm (3.9 in): Days with 10 cm or more snowfall331320022
25 cm (9.8 in): Days with 25 cm or more snowfall8219981

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2007.

Download the Data

  • Data for Thermopolis 9NE 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).