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Built 2026-10-16 (16 October 2026)

Deer Mountain Washington Threshold Days by Year

11 fixed thresholds counted per year at Deer Mountain Washington (USR0000WDEE): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Deer Mountain Washington Thresholds

  • Deer Mountain Washington: days with a maximum temperature at or above 30 C (86 F) in 21 years, most in 2017 with 50.
  • Deer Mountain Washington: days with a maximum temperature at or above 90 F (32.2 C) in 21 years, most in 2021 with 38.
  • Deer Mountain Washington: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 2022 with 67.
  • Deer Mountain Washington: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 2022 with 168.
  • 11 fixed thresholds have at least one qualifying day at Deer Mountain Washington.
21 years with a qualifying day
Days at or above 30 C (86 F) per year at Deer Mountain Washington Days per year at Deer Mountain Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 2017. 02040601986: 141987: 161998: 382003: 452004: 312007: 332008: 232012: 312014: 282015: 402016: 222017: 502018: 302019: 152020: 252021: 462022: 332023: 362024: 392025: 432026: 311986200320082015201820212024
Days per year at Deer Mountain Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 2017.
Days at or above 30 C (86 F) per year at Deer Mountain Washington
YearDaysDecade average
19861415
19871615
19983838
20034533
20043133
20073333
20082333
20123130.9
20142830.9
20154030.9
20162230.9
20175030.9
20183030.9
20191530.9
20202536.1
20214636.1
20223336.1
20233636.1
20243936.1
20254336.1
20263136.1
First to last qualifying date each year at Deer Mountain Washington For each year, a bar from the first to the last day at Deer Mountain Washington meeting 30 C (86 F). 1986: 26 May 1986 to 28 August 19861987: 26 June 1987 to 23 September 19871998: 30 June 1998 to 15 September 19982003: 24 May 2003 to 6 September 20032004: 22 June 2004 to 21 August 20042007: 2 June 2007 to 14 September 20072008: 16 May 2008 to 19 September 20082012: 14 May 2012 to 20 September 20122014: 2 July 2014 to 21 September 20142015: 7 June 2015 to 12 September 20152016: 4 June 2016 to 29 August 20162017: 29 May 2017 to 12 September 20172018: 5 July 2018 to 22 August 20182019: 13 June 2019 to 5 September 20192020: 23 June 2020 to 11 September 20202021: 1 June 2021 to 15 August 20212022: 27 June 2022 to 27 September 20222023: 2 May 2023 to 29 August 20232024: 5 July 2024 to 8 September 20242025: 28 May 2025 to 19 September 20252026: 28 May 2026 to 27 August 20261986200320082015201820212024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Deer Mountain Washington meeting 30 C (86 F).
First to last qualifying date each year at Deer Mountain Washington
YearFirst dateLast date
19861986-05-261986-08-28
19871987-06-261987-09-23
19981998-06-301998-09-15
20032003-05-242003-09-06
20042004-06-222004-08-21
20072007-06-022007-09-14
20082008-05-162008-09-19
20122012-05-142012-09-20
20142014-07-022014-09-21
20152015-06-072015-09-12
20162016-06-042016-08-29
20172017-05-292017-09-12
20182018-07-052018-08-22
20192019-06-132019-09-05
20202020-06-232020-09-11
20212021-06-012021-08-15
20222022-06-272022-09-27
20232023-05-022023-08-29
20242024-07-052024-09-08
20252025-05-282025-09-19
20262026-05-282026-08-27

Every Fixed Threshold

Fixed thresholds at Deer Mountain Washington
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2150201731
35 C (95 F): Days191420213
40 C (104 F): Days1320213
90 F (32.2 C): Days2138202115
100 F (37.8 C): Days9620212
0 C (32 F): Ice days (max2167202217
0 C (32 F): Frost days (min20168202281
-10 C (14 F): Days with min193020145
-20 C (-4 F): Days with min4619984
20 C (68 F): Tropical nights (min16920211
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 Deer 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).