Daily records
Page built 2026-10-19
Data as of 2026-10-17
Search
Built 2026-10-19 (19 October 2026)

Mt. Wilson Oregon Threshold Days by Year (USR0000OMTW)

9 fixed thresholds counted per year at Mt. Wilson Oregon (USR0000OMTW): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt. Wilson Oregon Thresholds

  • Mt. Wilson Oregon: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 2017 with 38.
  • Mt. Wilson Oregon: days with a maximum temperature at or below 0 C (32 F) in 35 years, most in 1993 with 44.
  • Mt. Wilson Oregon: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 2009 with 186.
  • Mt. Wilson Oregon: nights with a minimum temperature at or below -10 C (14 F) in 34 years, most in 1993 with 25.
  • 9 fixed thresholds have at least one qualifying day at Mt. Wilson Oregon.
35 years with a qualifying day
Days at or above 30 C (86 F) per year at Mt. Wilson Oregon Days per year at Mt. Wilson Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 2017. 0102030401992: 141993: 41994: 151995: 51996: 191997: 61998: 271999: 72000: 82001: 202002: 212003: 292004: 242005: 192006: 322007: 222008: 252009: 262010: 122011: 172012: 182013: 172014: 192015: 332016: 172017: 382018: 312019: 72020: 212021: 332022: 292023: 102024: 282025: 282026: 16199219962000200420082012201620202024
Days per year at Mt. Wilson Oregon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 2017.
Days at or above 30 C (86 F) per year at Mt. Wilson Oregon
YearDaysDecade average
19921412.1
1993412.1
19941512.1
1995512.1
19961912.1
1997612.1
19982712.1
1999712.1
2000822.6
20012022.6
20022122.6
20032922.6
20042422.6
20051922.6
20063222.6
20072222.6
20082522.6
20092622.6
20101220.9
20111720.9
20121820.9
20131720.9
20141920.9
20153320.9
20161720.9
20173820.9
20183120.9
2019720.9
20202123.6
20213323.6
20222923.6
20231023.6
20242823.6
20252823.6
20261623.6
First to last qualifying date each year at Mt. Wilson Oregon For each year, a bar from the first to the last day at Mt. Wilson Oregon meeting 30 C (86 F). 1992: 21 June 1992 to 18 August 19921993: 4 August 1993 to 29 September 19931994: 8 July 1994 to 27 September 19941995: 18 July 1995 to 15 September 19951996: 8 July 1996 to 29 August 19961997: 20 July 1997 to 19 August 19971998: 16 July 1998 to 15 September 19981999: 10 July 1999 to 22 September 19992000: 21 July 2000 to 14 September 20002001: 22 May 2001 to 23 September 20012002: 25 June 2002 to 14 September 20022003: 6 June 2003 to 26 September 20032004: 4 June 2004 to 31 August 20042005: 14 July 2005 to 8 September 20052006: 16 May 2006 to 26 September 20062007: 15 January 2007 to 11 September 20072008: 17 May 2008 to 30 September 20082009: 17 May 2009 to 25 September 20092010: 8 July 2010 to 25 August 20102011: 6 July 2011 to 24 September 20112012: 7 July 2012 to 20 September 20122013: 28 June 2013 to 14 September 20132014: 15 May 2014 to 7 September 20142015: 6 June 2015 to 12 September 20152016: 4 June 2016 to 26 September 20162017: 29 May 2017 to 12 September 20172018: 24 June 2018 to 7 September 20182019: 12 June 2019 to 28 August 20192020: 23 June 2020 to 6 September 20202021: 1 June 2021 to 16 August 20212022: 26 June 2022 to 6 September 20222023: 5 July 2023 to 16 September 20232024: 4 July 2024 to 24 September 20242025: 7 June 2025 to 24 September 20252026: 15 June 2026 to 25 August 20261992199720022007201220172022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mt. Wilson Oregon meeting 30 C (86 F).
First to last qualifying date each year at Mt. Wilson Oregon
YearFirst dateLast date
19921992-06-211992-08-18
19931993-08-041993-09-29
19941994-07-081994-09-27
19951995-07-181995-09-15
19961996-07-081996-08-29
19971997-07-201997-08-19
19981998-07-161998-09-15
19991999-07-101999-09-22
20002000-07-212000-09-14
20012001-05-222001-09-23
20022002-06-252002-09-14
20032003-06-062003-09-26
20042004-06-042004-08-31
20052005-07-142005-09-08
20062006-05-162006-09-26
20072007-01-152007-09-11
20082008-05-172008-09-30
20092009-05-172009-09-25
20102010-07-082010-08-25
20112011-07-062011-09-24
20122012-07-072012-09-20
20132013-06-282013-09-14
20142014-05-152014-09-07
20152015-06-062015-09-12
20162016-06-042016-09-26
20172017-05-292017-09-12
20182018-06-242018-09-07
20192019-06-122019-08-28
20202020-06-232020-09-06
20212021-06-012021-08-16
20222022-06-262022-09-06
20232023-07-052023-09-16
20242024-07-042024-09-24
20252025-06-072025-09-24
20262026-06-152026-08-25

Every Fixed Threshold

Fixed thresholds at Mt. Wilson Oregon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3538201716
35 C (95 F): Days21920172
90 F (32.2 C): Days322420174
100 F (37.8 C): Days5220212
0 C (32 F): Ice days (max354419938
0 C (32 F): Frost days (min34186200976
-10 C (14 F): Days with min342519931
-20 C (-4 F): Days with min6419963
20 C (68 F): Tropical nights (min3119941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1992.

Download the Data

  • Data for Mt. Wilson Oregon 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).