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

Casper Mtn. Threshold Days by Year (USS0006G01S)

12 fixed thresholds counted per year at Casper Mtn. (USS0006G01S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Casper Mtn. Thresholds

  • Casper Mtn.: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1995 with 35.
  • Casper Mtn.: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 2023 with 8.
  • Casper Mtn.: days with a maximum temperature at or below 0 C (32 F) in 34 years, most in 2023 with 119.
  • Casper Mtn.: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 2002 with 230.
  • 12 fixed thresholds have at least one qualifying day at Casper Mtn..
17 years with a qualifying day
Days at or above 30 C (86 F) per year at Casper Mtn. Days per year at Casper Mtn. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2003. 024681988: 41990: 31995: 11998: 32000: 32001: 22002: 62003: 82006: 52012: 12013: 12016: 12018: 22021: 32023: 12024: 12026: 3198819952000200220062013201820232026
Days per year at Casper Mtn. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2003.
Days at or above 30 C (86 F) per year at Casper Mtn.
YearDaysDecade average
198844
199032.3
199512.3
199832.3
200034.8
200124.8
200264.8
200384.8
200654.8
201211.3
201311.3
201611.3
201821.3
202132
202312
202412
202632
First to last qualifying date each year at Casper Mtn. For each year, a bar from the first to the last day at Casper Mtn. meeting 30 C (86 F). 1988: 24 June 1988 to 31 July 19881990: 24 June 1990 to 1 July 19901995: 29 July 1995 to 29 July 19951998: 17 July 1998 to 19 July 19982000: 14 July 2000 to 11 August 20002001: 5 July 2001 to 6 August 20012002: 1 July 2002 to 16 July 20022003: 13 July 2003 to 13 August 20032006: 15 June 2006 to 29 July 20062012: 25 June 2012 to 25 June 20122013: 11 July 2013 to 11 July 20132016: 17 June 2016 to 17 June 20162018: 7 July 2018 to 12 August 20182021: 14 June 2021 to 27 July 20212023: 17 July 2023 to 17 July 20232024: 25 July 2024 to 25 July 20242026: 12 July 2026 to 2 August 2026198819982002201220182024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Casper Mtn. meeting 30 C (86 F).
First to last qualifying date each year at Casper Mtn.
YearFirst dateLast date
19881988-06-241988-07-31
19901990-06-241990-07-01
19951995-07-291995-07-29
19981998-07-171998-07-19
20002000-07-142000-08-11
20012001-07-052001-08-06
20022002-07-012002-07-16
20032003-07-132003-08-13
20062006-06-152006-07-29
20122012-06-252012-06-25
20132013-07-112013-07-11
20162016-06-172016-06-17
20182018-07-072018-08-12
20212021-06-142021-07-27
20232023-07-172023-07-17
20242024-07-252024-07-25
20262026-07-122026-08-02

Every Fixed Threshold

Fixed thresholds at Casper Mtn.
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days17820033
35 C (95 F): Days1220062
90 F (32.2 C): Days1220062
0 C (32 F): Ice days (max34119202335
0 C (32 F): Frost days (min312302002116
-10 C (14 F): Days with min3191202027
-20 C (-4 F): Days with min301420223
-30 C (-22 F): Days with min7320113
10 mm (0.39 in): Days with 10 mm or more rain4435199514
25 mm (0.98 in): Days with 25 mm or more rain41820232
50 mm (1.97 in): Days with 50 mm or more rain17319961
100 mm (3.94 in): Days with 100 mm or more rain2119951

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1988.

Download the Data

  • Data for Casper Mtn. 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).