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Built 2026-10-19 (19 October 2026)

Days at or above 35 C (95 F) in Seattle

Seattle has had days with a maximum temperature at or above 35 C (95 F) in 34 years, most in 1977 with 4. Days per year, season span, streaks and every date.

Key Facts for Seattle

  • Seattle has had days with a maximum temperature at or above 35 C (95 F) in 34 years, 61 days in all.
  • The most in one year was 4 days in 1977.
  • In 2026, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 9 June 1955.
  • The latest last date in a year was 2 September 1988.
  • The longest run inside a single year was 3 days in 1977.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

34 years, 61 days
Days at or above 35 C (95 F) per year in Seattle Days per year in Seattle with a maximum temperature at or above 35 C (95 F). The line is the decade average. The most was 4 in 1977. Grey bars are years with under 90 percent of days observed, left out of rankings. 012341951: 21955: 11958: 21960: 21961: 11967: 21971: 11972: 11977: 41978: 21979: 21981: 21988: 31991: 11993: 11994: 11995: 11998: 22004: 22006: 32007: 12009: 32010: 32014: 12015: 12016: 12017: 12019: 12020: 12021: 42022: 32023: 22024: 22026: 11951197920072022
Days per year in Seattle with a maximum temperature at or above 35 C (95 F). The line is the decade average. The most was 4 in 1977. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days at or above 35 C (95 F) per year in Seattle
YearDaysDecade average
195121.7
195511.7
195821.7
196021.7
196111.7
196721.7
197112
197212
197742
197822
197922
198122.5
198832.5
199111.2
199311.2
199411.2
199511.2
199821.2
200422.3
200632.3
200712.3
200932.3
201031.3
201411.3
201511.3
201611.3
201711.3
201911.3
202012.2
202142.2
202232.2
202322.2
202422.2
202612.2

Season Span

earliest 9 June, latest 2 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 35 C (95 F). Long bars mean a long season. 1951: 11 July 1951 to 12 July 19511955: 9 June 1955 to 9 June 19551958: 27 July 1958 to 28 July 19581960: 8 August 1960 to 9 August 19601961: 12 July 1961 to 12 July 19611967: 16 August 1967 to 28 August 19671971: 29 July 1971 to 29 July 19711972: 7 August 1972 to 7 August 19721977: 10 August 1977 to 17 August 19771978: 22 July 1978 to 8 August 19781979: 16 July 1979 to 17 July 19791981: 9 August 1981 to 10 August 19811988: 19 July 1988 to 2 September 19881991: 23 July 1991 to 23 July 19911993: 4 August 1993 to 4 August 19931994: 20 July 1994 to 20 July 19941995: 30 June 1995 to 30 June 19951998: 27 July 1998 to 28 July 19982004: 23 July 2004 to 24 July 20042006: 21 July 2006 to 23 July 20062007: 11 July 2007 to 11 July 20072009: 28 July 2009 to 30 July 20092010: 8 July 2010 to 15 August 20102014: 11 August 2014 to 11 August 20142015: 19 July 2015 to 19 July 20152016: 19 August 2016 to 19 August 20162017: 25 June 2017 to 25 June 20172019: 12 June 2019 to 12 June 20192020: 16 August 2020 to 16 August 20202021: 26 June 2021 to 12 August 20212022: 29 July 2022 to 31 July 20222023: 15 August 2023 to 16 August 20232024: 8 July 2024 to 9 July 20242026: 22 July 2026 to 22 July 20261951196719791994200720162022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Seattle meeting 35 C (95 F). Long bars mean a long season.
First to last qualifying date each year in Seattle
YearFirst dateLast date
19511951-07-111951-07-12
19551955-06-091955-06-09
19581958-07-271958-07-28
19601960-08-081960-08-09
19611961-07-121961-07-12
19671967-08-161967-08-28
19711971-07-291971-07-29
19721972-08-071972-08-07
19771977-08-101977-08-17
19781978-07-221978-08-08
19791979-07-161979-07-17
19811981-08-091981-08-10
19881988-07-191988-09-02
19911991-07-231991-07-23
19931993-08-041993-08-04
19941994-07-201994-07-20
19951995-06-301995-06-30
19981998-07-271998-07-28
20042004-07-232004-07-24
20062006-07-212006-07-23
20072007-07-112007-07-11
20092009-07-282009-07-30
20102010-07-082010-08-15
20142014-08-112014-08-11
20152015-07-192015-07-19
20162016-08-192016-08-19
20172017-06-252017-06-25
20192019-06-122019-06-12
20202020-08-162020-08-16
20212021-06-262021-08-12
20222022-07-292022-07-31
20232023-08-152023-08-16
20242024-07-082024-07-09
20262026-07-222026-07-22

Every Year

Days at or above 35 C (95 F) per year in Seattle
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026122 July 202622 July 20261 daysIncomplete, not ranked
202428 July 20249 July 20242 daysComplete
2023215 August 202316 August 20232 daysComplete
2022329 July 202231 July 20223 daysComplete
2021426 June 202112 August 20213 daysComplete
2020116 August 202016 August 20201 daysComplete
2019112 June 201912 June 20191 daysComplete
2017125 June 201725 June 20171 daysComplete
2016119 August 201619 August 20161 daysComplete
2015119 July 201519 July 20151 daysComplete
2014111 August 201411 August 20141 daysComplete
201038 July 201015 August 20102 daysComplete
2009328 July 200930 July 20093 daysComplete
2007111 July 200711 July 20071 daysComplete
2006321 July 200623 July 20063 daysComplete
2004223 July 200424 July 20042 daysComplete
1998227 July 199828 July 19982 daysComplete
1995130 June 199530 June 19951 daysComplete
1994120 July 199420 July 19941 daysComplete
199314 August 19934 August 19931 daysComplete
1991123 July 199123 July 19911 daysComplete
1988319 July 19882 September 19882 daysComplete
198129 August 198110 August 19812 daysComplete
1979216 July 197917 July 19792 daysComplete
1978222 July 19788 August 19781 daysComplete
1977410 August 197717 August 19773 daysComplete
197217 August 19727 August 19721 daysComplete
1971129 July 197129 July 19711 daysComplete
1967216 August 196728 August 19671 daysComplete
1961112 July 196112 July 19611 daysComplete
196028 August 19609 August 19602 daysComplete
1958227 July 195828 July 19582 daysComplete
195519 June 19559 June 19551 daysComplete
1951211 July 195112 July 19512 daysComplete
Decade averages for Days at or above 35 C (95 F) in Seattle
DecadeAverage days per yearYears counted
1950s1.73
1960s1.73
1970s2.05
1980s2.52
1990s1.25
2000s2.34
2010s1.36
2020s2.45

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 35 C (95 F) 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).