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Built 2026-10-19 (19 October 2026)

Days with 10 cm (3.9 in) or more of snowfall in Seattle

Seattle has had days with 10 cm (3.9 in) or more of snowfall in 23 years, most in 1950 with 4. Days per year, season span, streaks and every date.

Key Facts for Seattle

  • Seattle has had days with 10 cm (3.9 in) or more of snowfall in 23 years, 35 days in all.
  • The most in one year was 4 days in 1950.
  • In 2021, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 1 January 1950.
  • The latest last date in a year was 31 December 1968.
  • The longest run inside a single year was 2 days in 1950.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

23 years, 35 days
Days with 10 cm (3.9 in) or more of snowfall per year in Seattle Days per year in Seattle with 10 cm (3.9 in) or more of snowfall. The line is the decade average. The most was 4 in 1950. Grey bars are years with under 90 percent of days observed, left out of rankings. 012341949: 11950: 41951: 11954: 11955: 31956: 11959: 11960: 21962: 11965: 11967: 11968: 21969: 21972: 21974: 11980: 11985: 21989: 21990: 12012: 12017: 12019: 22021: 1194919672017
Days per year in Seattle with 10 cm (3.9 in) or more of snowfall. The line is the decade average. The most was 4 in 1950. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 10 cm (3.9 in) or more of snowfall per year in Seattle
YearDaysDecade average
194911
195041.8
195111.8
195411.8
195531.8
195611.8
195911.8
196021.5
196211.5
196511.5
196711.5
196821.5
196921.5
197221.5
197411.5
198011.7
198521.7
198921.7
199011
201211.3
201711.3
201921.3
202111

Season Span

earliest 1 January, latest 31 December
First to last qualifying date each year in Seattle For each year, a bar from the first to the last day in Seattle meeting 10 cm (3.9 in). Long bars mean a long season. 1949: 19 February 1949 to 19 February 19491950: 1 January 1950 to 26 January 19501951: 8 March 1951 to 8 March 19511954: 17 January 1954 to 17 January 19541955: 3 March 1955 to 18 December 19551956: 14 February 1956 to 14 February 19561959: 10 February 1959 to 10 February 19591960: 3 March 1960 to 20 November 19601962: 28 February 1962 to 28 February 19621965: 23 December 1965 to 23 December 19651967: 4 January 1967 to 4 January 19671968: 18 December 1968 to 31 December 19681969: 27 January 1969 to 29 January 19691972: 25 January 1972 to 11 December 19721974: 26 December 1974 to 26 December 19741980: 8 January 1980 to 8 January 19801985: 21 November 1985 to 27 November 19851989: 1 February 1989 to 1 March 19891990: 17 February 1990 to 17 February 19902012: 18 January 2012 to 18 January 20122017: 6 February 2017 to 6 February 20172019: 8 February 2019 to 11 February 20192021: 13 February 2021 to 13 February 202119491954195919651969198019902019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Seattle meeting 10 cm (3.9 in). Long bars mean a long season.
First to last qualifying date each year in Seattle
YearFirst dateLast date
19491949-02-191949-02-19
19501950-01-011950-01-26
19511951-03-081951-03-08
19541954-01-171954-01-17
19551955-03-031955-12-18
19561956-02-141956-02-14
19591959-02-101959-02-10
19601960-03-031960-11-20
19621962-02-281962-02-28
19651965-12-231965-12-23
19671967-01-041967-01-04
19681968-12-181968-12-31
19691969-01-271969-01-29
19721972-01-251972-12-11
19741974-12-261974-12-26
19801980-01-081980-01-08
19851985-11-211985-11-27
19891989-02-011989-03-01
19901990-02-171990-02-17
20122012-01-182012-01-18
20172017-02-062017-02-06
20192019-02-082019-02-11
20212021-02-132021-02-13

Every Year

Days with 10 cm (3.9 in) or more of snowfall per year in Seattle
YearDaysFirst dateLast dateLongest streak in yearCoverage
2021113 February 202113 February 20211 daysComplete
201928 February 201911 February 20191 daysComplete
201716 February 20176 February 20171 daysComplete
2012118 January 201218 January 20121 daysComplete
1990117 February 199017 February 19901 daysComplete
198921 February 19891 March 19891 daysComplete
1985221 November 198527 November 19851 daysComplete
198018 January 19808 January 19801 daysComplete
1974126 December 197426 December 19741 daysComplete
1972225 January 197211 December 19721 daysComplete
1969227 January 196929 January 19691 daysComplete
1968218 December 196831 December 19681 daysComplete
196714 January 19674 January 19671 daysComplete
1965123 December 196523 December 19651 daysComplete
1962128 February 196228 February 19621 daysComplete
196023 March 196020 November 19601 daysComplete
1959110 February 195910 February 19591 daysComplete
1956114 February 195614 February 19561 daysComplete
195533 March 195518 December 19551 daysComplete
1954117 January 195417 January 19541 daysComplete
195118 March 19518 March 19511 daysComplete
195041 January 195026 January 19502 daysComplete
1949119 February 194919 February 19491 daysComplete
Decade averages for Days with 10 cm (3.9 in) or more of snowfall in Seattle
DecadeAverage days per yearYears counted
1940s1.01
1950s1.86
1960s1.56
1970s1.52
1980s1.73
1990s1.01
2010s1.33
2020s1.01

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 with 10 cm (3.9 in) or more of snowfall 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).