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Built 2026-10-19 (19 October 2026)

Days at or above 90 F (32.2 C) in Seattle

Seattle has had days with a maximum temperature at or above 90 F (32.2 C) in 64 years, most in 2022 with 13. Days per year, season span, streaks and every date.

Key Facts for Seattle

  • Seattle has had days with a maximum temperature at or above 90 F (32.2 C) in 64 years, 278 days in all.
  • The most in one year was 13 days in 2022.
  • In 2026, the latest year on file, there were 4 such days.
  • The earliest first date in a year was 17 May 2008.
  • The latest last date in a year was 22 September 1989.
  • The longest run inside a single year was 6 days in 2022.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

64 years, 278 days
Days at or above 90 F (32.2 C) per year in Seattle Days per year in Seattle with a maximum temperature at or above 90 F (32.2 C). The line is the decade average. The most was 13 in 2022. Grey bars are years with under 90 percent of days observed, left out of rankings. 0510151949: 11951: 41952: 11955: 11956: 11958: 91959: 21960: 51961: 51963: 21964: 11965: 61967: 61968: 31969: 21970: 31971: 61972: 61973: 11974: 31975: 11977: 61978: 41979: 51981: 61982: 21983: 11984: 11985: 31986: 41987: 31988: 81989: 21990: 71991: 11992: 61993: 11994: 31995: 51996: 31998: 42002: 22003: 42004: 32006: 52007: 12008: 62009: 72010: 62012: 52013: 22014: 52015: 122016: 72017: 82018: 112019: 22020: 42021: 82022: 132023: 62024: 52025: 82026: 41949196419751987199820132023
Days per year in Seattle with a maximum temperature at or above 90 F (32.2 C). The line is the decade average. The most was 13 in 2022. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days at or above 90 F (32.2 C) per year in Seattle
YearDaysDecade average
194911
195143
195213
195513
195613
195893
195923
196053.8
196153.8
196323.8
196413.8
196563.8
196763.8
196833.8
196923.8
197033.9
197163.9
197263.9
197313.9
197433.9
197513.9
197763.9
197843.9
197953.9
198163.3
198223.3
198313.3
198413.3
198533.3
198643.3
198733.3
198883.3
198923.3
199073.8
199113.8
199263.8
199313.8
199433.8
199553.8
199633.8
199843.8
200224
200344
200434
200654
200714
200864
200974
201066.4
201256.4
201326.4
201456.4
2015126.4
201676.4
201786.4
2018116.4
201926.4
202046.9
202186.9
2022136.9
202366.9
202456.9
202586.9
202646.9

Season Span

earliest 17 May, latest 22 September
First to last qualifying date each year in Seattle For each year, a bar from the first to the last day in Seattle meeting 90 F (32.2 C). Long bars mean a long season. 1949: 1 August 1949 to 1 August 19491951: 29 June 1951 to 12 July 19511952: 4 August 1952 to 4 August 19521955: 9 June 1955 to 9 June 19551956: 19 July 1956 to 19 July 19561958: 17 June 1958 to 28 July 19581959: 22 July 1959 to 31 July 19591960: 6 July 1960 to 9 August 19601961: 17 June 1961 to 11 August 19611963: 20 May 1963 to 21 May 19631964: 31 May 1964 to 31 May 19641965: 6 July 1965 to 1 August 19651967: 9 August 1967 to 16 September 19671968: 2 July 1968 to 1 August 19681969: 23 May 1969 to 17 June 19691970: 1 June 1970 to 15 July 19701971: 26 July 1971 to 11 August 19711972: 28 May 1972 to 8 August 19721973: 28 July 1973 to 28 July 19731974: 28 August 1974 to 2 September 19741975: 5 July 1975 to 5 July 19751977: 9 August 1977 to 17 August 19771978: 5 June 1978 to 8 August 19781979: 16 July 1979 to 14 September 19791981: 7 August 1981 to 7 September 19811982: 18 June 1982 to 19 June 19821983: 28 May 1983 to 28 May 19831984: 23 July 1984 to 23 July 19841985: 9 July 1985 to 20 July 19851986: 13 June 1986 to 26 August 19861987: 29 June 1987 to 1 September 19871988: 19 July 1988 to 3 September 19881989: 24 June 1989 to 22 September 19891990: 20 July 1990 to 22 September 19901991: 23 July 1991 to 23 July 19911992: 22 June 1992 to 13 August 19921993: 4 August 1993 to 4 August 19931994: 20 July 1994 to 22 July 19941995: 28 June 1995 to 19 July 19951996: 14 July 1996 to 27 July 19961998: 22 July 1998 to 28 July 19982002: 13 June 2002 to 13 August 20022003: 6 June 2003 to 30 July 20032004: 23 July 2004 to 9 August 20042006: 26 June 2006 to 24 July 20062007: 11 July 2007 to 11 July 20072008: 17 May 2008 to 16 August 20082009: 4 June 2009 to 1 August 20092010: 7 July 2010 to 16 August 20102012: 4 August 2012 to 7 September 20122013: 30 June 2013 to 11 September 20132014: 1 July 2014 to 6 September 20142015: 27 June 2015 to 1 August 20152016: 5 June 2016 to 26 August 20162017: 25 June 2017 to 3 September 20172018: 15 July 2018 to 21 August 20182019: 12 June 2019 to 21 July 20192020: 27 July 2020 to 10 September 20202021: 26 June 2021 to 13 August 20212022: 26 June 2022 to 10 September 20222023: 5 July 2023 to 17 August 20232024: 6 July 2024 to 5 September 20242025: 8 June 2025 to 16 September 20252026: 15 June 2026 to 22 July 202619491961197119811989199820102019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Seattle meeting 90 F (32.2 C). Long bars mean a long season.
First to last qualifying date each year in Seattle
YearFirst dateLast date
19491949-08-011949-08-01
19511951-06-291951-07-12
19521952-08-041952-08-04
19551955-06-091955-06-09
19561956-07-191956-07-19
19581958-06-171958-07-28
19591959-07-221959-07-31
19601960-07-061960-08-09
19611961-06-171961-08-11
19631963-05-201963-05-21
19641964-05-311964-05-31
19651965-07-061965-08-01
19671967-08-091967-09-16
19681968-07-021968-08-01
19691969-05-231969-06-17
19701970-06-011970-07-15
19711971-07-261971-08-11
19721972-05-281972-08-08
19731973-07-281973-07-28
19741974-08-281974-09-02
19751975-07-051975-07-05
19771977-08-091977-08-17
19781978-06-051978-08-08
19791979-07-161979-09-14
19811981-08-071981-09-07
19821982-06-181982-06-19
19831983-05-281983-05-28
19841984-07-231984-07-23
19851985-07-091985-07-20
19861986-06-131986-08-26
19871987-06-291987-09-01
19881988-07-191988-09-03
19891989-06-241989-09-22
19901990-07-201990-09-22
19911991-07-231991-07-23
19921992-06-221992-08-13
19931993-08-041993-08-04
19941994-07-201994-07-22
19951995-06-281995-07-19
19961996-07-141996-07-27
19981998-07-221998-07-28
20022002-06-132002-08-13
20032003-06-062003-07-30
20042004-07-232004-08-09
20062006-06-262006-07-24
20072007-07-112007-07-11
20082008-05-172008-08-16
20092009-06-042009-08-01
20102010-07-072010-08-16
20122012-08-042012-09-07
20132013-06-302013-09-11
20142014-07-012014-09-06
20152015-06-272015-08-01
20162016-06-052016-08-26
20172017-06-252017-09-03
20182018-07-152018-08-21
20192019-06-122019-07-21
20202020-07-272020-09-10
20212021-06-262021-08-13
20222022-06-262022-09-10
20232023-07-052023-08-17
20242024-07-062024-09-05
20252025-06-082025-09-16
20262026-06-152026-07-22

Every Year

Days at or above 90 F (32.2 C) per year in Seattle
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026415 June 202622 July 20262 daysIncomplete, not ranked
202588 June 202516 September 20253 daysComplete
202456 July 20245 September 20244 daysComplete
202365 July 202317 August 20234 daysComplete
20221326 June 202210 September 20226 daysComplete
2021826 June 202113 August 20213 daysComplete
2020427 July 202010 September 20201 daysComplete
2019212 June 201921 July 20191 daysComplete
20181115 July 201821 August 20184 daysComplete
2017825 June 20173 September 20173 daysComplete
201675 June 201626 August 20162 daysComplete
20151227 June 20151 August 20155 daysComplete
201451 July 20146 September 20141 daysComplete
2013230 June 201311 September 20131 daysComplete
201254 August 20127 September 20122 daysComplete
201067 July 201016 August 20103 daysComplete
200974 June 20091 August 20094 daysComplete
2008617 May 200816 August 20083 daysComplete
2007111 July 200711 July 20071 daysComplete
2006526 June 200624 July 20064 daysComplete
2004323 July 20049 August 20042 daysComplete
200346 June 200330 July 20032 daysComplete
2002213 June 200213 August 20021 daysComplete
1998422 July 199828 July 19983 daysComplete
1996314 July 199627 July 19961 daysComplete
1995528 June 199519 July 19953 daysComplete
1994320 July 199422 July 19943 daysComplete
199314 August 19934 August 19931 daysComplete
1992622 June 199213 August 19923 daysComplete
1991123 July 199123 July 19911 daysComplete
1990720 July 199022 September 19902 daysComplete
1989224 June 198922 September 19891 daysComplete
1988819 July 19883 September 19882 daysComplete
1987329 June 19871 September 19872 daysComplete
1986413 June 198626 August 19862 daysComplete
198539 July 198520 July 19852 daysComplete
1984123 July 198423 July 19841 daysComplete
1983128 May 198328 May 19831 daysComplete
1982218 June 198219 June 19822 daysComplete
198167 August 19817 September 19815 daysComplete
1979516 July 197914 September 19794 daysComplete
197845 June 19788 August 19782 daysComplete
197769 August 197717 August 19774 daysComplete
197515 July 19755 July 19751 daysComplete
1974328 August 19742 September 19742 daysComplete
1973128 July 197328 July 19731 daysComplete
1972628 May 19728 August 19723 daysComplete
1971626 July 197111 August 19714 daysComplete
197031 June 197015 July 19702 daysComplete
1969223 May 196917 June 19691 daysComplete
196832 July 19681 August 19682 daysComplete
196769 August 196716 September 19672 daysComplete
196566 July 19651 August 19654 daysComplete
1964131 May 196431 May 19641 daysComplete
1963220 May 196321 May 19632 daysComplete
1961517 June 196111 August 19613 daysComplete
196056 July 19609 August 19602 daysComplete
1959222 July 195931 July 19591 daysComplete
1958917 June 195828 July 19582 daysComplete
1956119 July 195619 July 19561 daysComplete
195519 June 19559 June 19551 daysComplete
195214 August 19524 August 19521 daysComplete
1951429 June 195112 July 19512 daysComplete
194911 August 19491 August 19491 daysComplete
Decade averages for Days at or above 90 F (32.2 C) in Seattle
DecadeAverage days per yearYears counted
1940s1.01
1950s3.06
1960s3.88
1970s3.99
1980s3.39
1990s3.88
2000s4.07
2010s6.49
2020s7.36

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Days at or above 90 F (32.2 C) in Seattle, 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 from the threaded city record.

Data as of . Last revised (2026-10-17).