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

Washington Wwtp 4W Threshold Days by Year (USC00319100)

16 fixed thresholds counted per year at Washington Wwtp 4W (USC00319100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Washington Wwtp 4W Thresholds

  • Washington Wwtp 4W: days with 10 mm (0.39 in) or more of precipitation in 88 years, most in 1906 with 62.
  • Washington Wwtp 4W: days with 25 mm (0.98 in) or more of precipitation in 88 years, most in 2003 with 28.
  • Washington Wwtp 4W: days with 50 mm (1.97 in) or more of precipitation in 85 years, most in 1996 with 8.
  • Washington Wwtp 4W: days with 100 mm (3.94 in) or more of precipitation in 33 years, most in 1971 with 4.
  • 16 fixed thresholds have at least one qualifying day at Washington Wwtp 4W.
26 years with a qualifying day
Days at or above 30 C (86 F) per year at Washington Wwtp 4W Days per year at Washington Wwtp 4W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 116 in 2010. 0501001501903: 991904: 941905: 761906: 1082005: 822006: 682007: 932008: 992009: 902010: 1162011: 1072012: 782013: 732014: 532015: 692016: 812017: 552018: 562019: 612020: 692021: 882022: 962023: 832024: 862025: 822026: 111190319062007201020132016201920222025
Days per year at Washington Wwtp 4W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 116 in 2010.
Days at or above 30 C (86 F) per year at Washington Wwtp 4W
YearDaysDecade average
19039994.3
19049494.3
19057694.3
190610894.3
20058286.4
20066886.4
20079386.4
20089986.4
20099086.4
201011674.9
201110774.9
20127874.9
20137374.9
20145374.9
20156974.9
20168174.9
20175574.9
20185674.9
20196174.9
20206987.9
20218887.9
20229687.9
20238387.9
20248687.9
20258287.9
202611187.9
First to last qualifying date each year at Washington Wwtp 4W For each year, a bar from the first to the last day at Washington Wwtp 4W meeting 30 C (86 F). 1903: 29 April 1903 to 8 October 19031904: 27 April 1904 to 14 October 19041905: 4 May 1905 to 2 October 19051906: 11 April 1906 to 7 December 19062005: 21 April 2005 to 4 October 20052006: 16 April 2006 to 25 September 20062007: 26 April 2007 to 10 October 20072008: 18 April 2008 to 16 October 20082009: 24 April 2009 to 10 October 20092010: 5 April 2010 to 27 October 20102011: 20 April 2011 to 28 September 20112012: 17 April 2012 to 8 September 20122013: 10 April 2013 to 5 October 20132014: 2 April 2014 to 11 October 20142015: 12 May 2015 to 10 September 20152016: 16 March 2016 to 24 September 20162017: 28 April 2017 to 28 September 20172018: 12 May 2018 to 5 October 20182019: 18 May 2019 to 3 October 20192020: 24 June 2020 to 26 September 20202021: 28 April 2021 to 16 October 20212022: 25 April 2022 to 22 September 20222023: 24 March 2023 to 12 September 20232024: 15 April 2024 to 30 September 20242025: 4 April 2025 to 26 September 20252026: 11 March 2026 to 2 October 20261903200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Washington Wwtp 4W meeting 30 C (86 F).
First to last qualifying date each year at Washington Wwtp 4W
YearFirst dateLast date
19031903-04-291903-10-08
19041904-04-271904-10-14
19051905-05-041905-10-02
19061906-04-111906-12-07
20052005-04-212005-10-04
20062006-04-162006-09-25
20072007-04-262007-10-10
20082008-04-182008-10-16
20092009-04-242009-10-10
20102010-04-052010-10-27
20112011-04-202011-09-28
20122012-04-172012-09-08
20132013-04-102013-10-05
20142014-04-022014-10-11
20152015-05-122015-09-10
20162016-03-162016-09-24
20172017-04-282017-09-28
20182018-05-122018-10-05
20192019-05-182019-10-03
20202020-06-242020-09-26
20212021-04-282021-10-16
20222022-04-252022-09-22
20232023-03-242023-09-12
20242024-04-152024-09-30
20252025-04-042025-09-26
20262026-03-112026-10-02

Every Fixed Threshold

Fixed thresholds at Washington Wwtp 4W
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days261162010111
35 C (95 F): Days2235190322
90 F (32.2 C): Days2676201062
100 F (37.8 C): Days6719031
0 C (32 F): Ice days (max15620181
0 C (32 F): Frost days (min2781190436
-10 C (14 F): Days with min8620181
20 C (68 F): Tropical nights (min271112011106
25 C (77 F): Days with min2319201119
10 mm (0.39 in): Days with 10 mm or more rain8862190632
25 mm (0.98 in): Days with 25 mm or more rain882820038
50 mm (1.97 in): Days with 50 mm or more rain85819961
100 mm (3.94 in): Days with 100 mm or more rain33419712
200 mm (7.87 in): Days with 200 mm or more rain3120101
10 cm (3.9 in): Days with 10 cm or more snowfall13419801
25 cm (9.8 in): Days with 25 cm or more snowfall2119801

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

  • Data for Washington Wwtp 4W 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).