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Data as of 2026-10-12
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Built 2026-10-19 (19 October 2026)

Washington Threshold Days by Year (USC00238746)

17 fixed thresholds counted per year at Washington (USC00238746): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Washington Thresholds

  • Washington: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 2004 with 46.
  • Washington: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 2004 with 22.
  • Washington: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 2024 with 9.
  • Washington: days with a maximum temperature at or above 30 C (86 F) in 17 years, most in 2018 with 103.
  • 17 fixed thresholds have at least one qualifying day at Washington.
17 years with a qualifying day
Days at or above 30 C (86 F) per year at Washington Days per year at Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 2018. 0501001502010: 922011: 772012: 862013: 582014: 542015: 512016: 822017: 692018: 1032019: 782020: 672021: 742022: 802023: 712024: 752025: 832026: 87201020122014201620182020202220242026
Days per year at Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 2018.
Days at or above 30 C (86 F) per year at Washington
YearDaysDecade average
20109275
20117775
20128675
20135875
20145475
20155175
20168275
20176975
201810375
20197875
20206776.7
20217476.7
20228076.7
20237176.7
20247576.7
20258376.7
20268776.7
First to last qualifying date each year at Washington For each year, a bar from the first to the last day at Washington meeting 30 C (86 F). 2010: 1 April 2010 to 24 September 20102011: 4 April 2011 to 14 September 20112012: 15 March 2012 to 26 September 20122013: 1 May 2013 to 5 October 20132014: 6 May 2014 to 2 October 20142015: 8 June 2015 to 19 September 20152016: 8 May 2016 to 18 October 20162017: 10 April 2017 to 15 October 20172018: 13 April 2018 to 7 October 20182019: 22 April 2019 to 3 October 20192020: 8 April 2020 to 23 October 20202021: 4 May 2021 to 11 October 20212022: 23 April 2022 to 25 September 20222023: 5 April 2023 to 9 November 20232024: 14 April 2024 to 13 October 20242025: 14 April 2025 to 18 October 20252026: 11 March 2026 to 9 October 2026201020132016201920222025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Washington meeting 30 C (86 F).
First to last qualifying date each year at Washington
YearFirst dateLast date
20102010-04-012010-09-24
20112011-04-042011-09-14
20122012-03-152012-09-26
20132013-05-012013-10-05
20142014-05-062014-10-02
20152015-06-082015-09-19
20162016-05-082016-10-18
20172017-04-102017-10-15
20182018-04-132018-10-07
20192019-04-222019-10-03
20202020-04-082020-10-23
20212021-05-042021-10-11
20222022-04-232022-09-25
20232023-04-052023-11-09
20242024-04-142024-10-13
20252025-04-142025-10-18
20262026-03-112026-10-09

Every Fixed Threshold

Fixed thresholds at Washington
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days17103201887
35 C (95 F): Days1730201214
40 C (104 F): Days1620126
90 F (32.2 C): Days1768201855
100 F (37.8 C): Days71520121
0 C (32 F): Ice days (max1735201011
0 C (32 F): Frost days (min17135201359
-10 C (14 F): Days with min1736201418
-20 C (-4 F): Days with min10620143
20 C (68 F): Tropical nights (min1767201658
25 C (77 F): Days with min6320223
10 mm (0.39 in): Days with 10 mm or more rain3546200431
25 mm (0.98 in): Days with 25 mm or more rain3522200410
50 mm (1.97 in): Days with 50 mm or more rain32920241
100 mm (3.94 in): Days with 100 mm or more rain7119961
200 mm (7.87 in): Days with 200 mm or more rain1120001
10 cm (3.9 in): Days with 10 cm or more snowfall11220081

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2010.

Download the Data

  • Data for 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).