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Built 2026-10-19 (19 October 2026)

Mormon Mountain Threshold Days by Year (USS0011R03S)

11 fixed thresholds counted per year at Mormon Mountain (USS0011R03S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mormon Mountain Thresholds

  • Mormon Mountain: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1993 with 37.
  • Mormon Mountain: days with 25 mm (0.98 in) or more of precipitation in 46 years, most in 2015 with 12.
  • Mormon Mountain: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 2007 with 24.
  • Mormon Mountain: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 2020 with 31.
  • 11 fixed thresholds have at least one qualifying day at Mormon Mountain.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Mormon Mountain Days per year at Mormon Mountain with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 2020. 0102030401990: 101991: 51992: 41993: 21994: 101995: 111996: 61997: 31998: 52000: 122001: 82005: 92006: 112007: 102008: 42009: 102010: 22011: 52012: 52013: 92014: 12015: 42016: 122017: 192018: 162019: 152020: 312021: 152022: 102023: 162024: 82025: 172026: 12199019941998200620102014201820222026
Days per year at Mormon Mountain with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 2020.
Days at or above 30 C (86 F) per year at Mormon Mountain
YearDaysDecade average
1990106.2
199156.2
199246.2
199326.2
1994106.2
1995116.2
199666.2
199736.2
199856.2
2000129.1
200189.1
200599.1
2006119.1
2007109.1
200849.1
2009109.1
201028.8
201158.8
201258.8
201398.8
201418.8
201548.8
2016128.8
2017198.8
2018168.8
2019158.8
20203115.6
20211515.6
20221015.6
20231615.6
2024815.6
20251715.6
20261215.6
First to last qualifying date each year at Mormon Mountain For each year, a bar from the first to the last day at Mormon Mountain meeting 30 C (86 F). 1990: 21 June 1990 to 1 July 19901991: 2 July 1991 to 20 August 19911992: 21 June 1992 to 15 July 19921993: 31 July 1993 to 1 August 19931994: 24 June 1994 to 6 August 19941995: 26 July 1995 to 1 September 19951996: 22 July 1996 to 30 August 19961997: 14 July 1997 to 16 July 19971998: 15 July 1998 to 28 August 19982000: 15 June 2000 to 14 September 20002001: 21 June 2001 to 27 August 20012005: 12 July 2005 to 21 July 20052006: 5 June 2006 to 25 July 20062007: 30 June 2007 to 19 July 20072008: 20 June 2008 to 1 August 20082009: 30 June 2009 to 20 August 20092010: 6 June 2010 to 15 July 20102011: 22 June 2011 to 24 August 20112012: 20 June 2012 to 10 July 20122013: 8 June 2013 to 9 July 20132014: 30 June 2014 to 30 June 20142015: 20 June 2015 to 27 June 20152016: 5 June 2016 to 29 July 20162017: 16 June 2017 to 4 September 20172018: 12 June 2018 to 7 August 20182019: 15 July 2019 to 1 September 20192020: 23 June 2020 to 7 September 20202021: 13 June 2021 to 3 August 20212022: 10 June 2022 to 22 July 20222023: 2 July 2023 to 28 July 20232024: 7 June 2024 to 21 July 20242025: 16 June 2025 to 22 August 20252026: 23 June 2026 to 18 August 20261990199520012009201420192024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mormon Mountain meeting 30 C (86 F).
First to last qualifying date each year at Mormon Mountain
YearFirst dateLast date
19901990-06-211990-07-01
19911991-07-021991-08-20
19921992-06-211992-07-15
19931993-07-311993-08-01
19941994-06-241994-08-06
19951995-07-261995-09-01
19961996-07-221996-08-30
19971997-07-141997-07-16
19981998-07-151998-08-28
20002000-06-152000-09-14
20012001-06-212001-08-27
20052005-07-122005-07-21
20062006-06-052006-07-25
20072007-06-302007-07-19
20082008-06-202008-08-01
20092009-06-302009-08-20
20102010-06-062010-07-15
20112011-06-222011-08-24
20122012-06-202012-07-10
20132013-06-082013-07-09
20142014-06-302014-06-30
20152015-06-202015-06-27
20162016-06-052016-07-29
20172017-06-162017-09-04
20182018-06-122018-08-07
20192019-07-152019-09-01
20202020-06-232020-09-07
20212021-06-132021-08-03
20222022-06-102022-07-22
20232023-07-022023-07-28
20242024-06-072024-07-21
20252025-06-162025-08-22
20262026-06-232026-08-18

Every Fixed Threshold

Fixed thresholds at Mormon Mountain
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3331202012
35 C (95 F): Days2219921
90 F (32.2 C): Days181220201
0 C (32 F): Ice days (max362420075
0 C (32 F): Frost days (min31207199873
-10 C (14 F): Days with min313520013
-20 C (-4 F): Days with min4220112
10 mm (0.39 in): Days with 10 mm or more rain4637199325
25 mm (0.98 in): Days with 25 mm or more rain461220158
50 mm (1.97 in): Days with 50 mm or more rain31420081
100 mm (3.94 in): Days with 100 mm or more rain1119951

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 Mormon Mountain 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).