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Built 2026-10-16 (16 October 2026)

Cougar Mountain Washington Threshold Days by Year

9 fixed thresholds counted per year at Cougar Mountain Washington (USR0000WCOU): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cougar Mountain Washington Thresholds

  • Cougar Mountain Washington: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 1989 with 26.
  • Cougar Mountain Washington: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 2011 with 143.
  • Cougar Mountain Washington: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 2009 with 10.
  • Cougar Mountain Washington: nights with a minimum temperature at or below -10 C (14 F) in 20 years, most in 1990 with 10.
  • 9 fixed thresholds have at least one qualifying day at Cougar Mountain Washington.
27 years with a qualifying day
Days at or above 30 C (86 F) per year at Cougar Mountain Washington Days per year at Cougar Mountain Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 2009. 0358101986: 11987: 11992: 21993: 12002: 22003: 32004: 32006: 52007: 12008: 42009: 102010: 52011: 12012: 42013: 12014: 22015: 42016: 12017: 42018: 32020: 22021: 82022: 72023: 42024: 42025: 42026: 2198619932004200820112014201720212024
Days per year at Cougar Mountain Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 2009.
Days at or above 30 C (86 F) per year at Cougar Mountain Washington
YearDaysDecade average
198611
198711
199221.5
199311.5
200224
200334
200434
200654
200714
200844
2009104
201052.8
201112.8
201242.8
201312.8
201422.8
201542.8
201612.8
201742.8
201832.8
202024.4
202184.4
202274.4
202344.4
202444.4
202544.4
202624.4
First to last qualifying date each year at Cougar Mountain Washington For each year, a bar from the first to the last day at Cougar Mountain Washington meeting 30 C (86 F). 1986: 27 August 1986 to 27 August 19861987: 1 October 1987 to 1 October 19871992: 23 June 1992 to 13 August 19921993: 4 August 1993 to 4 August 19932002: 23 July 2002 to 13 August 20022003: 29 July 2003 to 3 September 20032004: 24 July 2004 to 14 August 20042006: 26 June 2006 to 24 July 20062007: 11 July 2007 to 11 July 20072008: 28 June 2008 to 16 August 20082009: 4 June 2009 to 22 September 20092010: 8 July 2010 to 16 August 20102011: 11 September 2011 to 11 September 20112012: 4 August 2012 to 17 August 20122013: 11 September 2013 to 11 September 20132014: 13 July 2014 to 11 August 20142015: 2 July 2015 to 1 August 20152016: 5 June 2016 to 5 June 20162017: 25 June 2017 to 28 August 20172018: 29 July 2018 to 9 August 20182020: 16 August 2020 to 9 September 20202021: 26 June 2021 to 13 August 20212022: 26 July 2022 to 18 August 20222023: 14 August 2023 to 17 August 20232024: 8 July 2024 to 6 September 20242025: 10 August 2025 to 24 August 20252026: 21 July 2026 to 22 July 20261986200220072011201520202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Cougar Mountain Washington meeting 30 C (86 F).
First to last qualifying date each year at Cougar Mountain Washington
YearFirst dateLast date
19861986-08-271986-08-27
19871987-10-011987-10-01
19921992-06-231992-08-13
19931993-08-041993-08-04
20022002-07-232002-08-13
20032003-07-292003-09-03
20042004-07-242004-08-14
20062006-06-262006-07-24
20072007-07-112007-07-11
20082008-06-282008-08-16
20092009-06-042009-09-22
20102010-07-082010-08-16
20112011-09-112011-09-11
20122012-08-042012-08-17
20132013-09-112013-09-11
20142014-07-132014-08-11
20152015-07-022015-08-01
20162016-06-052016-06-05
20172017-06-252017-08-28
20182018-07-292018-08-09
20202020-08-162020-09-09
20212021-06-262021-08-13
20222022-07-262022-08-18
20232023-08-142023-08-17
20242024-07-082024-09-06
20252025-08-102025-08-24
20262026-07-212026-07-22

Every Fixed Threshold

Fixed thresholds at Cougar Mountain Washington
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days271020092
35 C (95 F): Days2320213
90 F (32.2 C): Days10420091
100 F (37.8 C): Days1220212
0 C (32 F): Ice days (max302619891
0 C (32 F): Frost days (min30143201145
-10 C (14 F): Days with min201019902
20 C (68 F): Tropical nights (min11520211
25 C (77 F): Days with min1120211

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1986.

Download the Data

  • Data for Cougar Mountain Washington 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-14).