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Built 2026-10-19 (19 October 2026)

Nights at or below -10 C (14 F) in Seattle

Seattle has had nights with a minimum temperature at or below -10 C (14 F) in 21 years, most in 1950 with 16. Days per year, season span, streaks and every date.

Key Facts for Seattle

  • Seattle has had nights with a minimum temperature at or below -10 C (14 F) in 21 years, 60 days in all.
  • The most in one year was 16 days in 1950.
  • In 2010, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 1 January 1952.
  • The latest last date in a year was 31 December 1968.
  • The longest run inside a single year was 7 days in 1950.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

21 years, 60 days
Nights at or below -10 C (14 F) per year in Seattle Days per year in Seattle with a minimum temperature at or below -10 C (14 F). The line is the decade average. The most was 16 in 1950. Grey bars are years with under 90 percent of days observed, left out of rankings. 051015201949: 21950: 161951: 11952: 11955: 61956: 21957: 21959: 11962: 11963: 21964: 21968: 41972: 31978: 21982: 11983: 21985: 21989: 41990: 42008: 12010: 1194919642010
Days per year in Seattle with a minimum temperature at or below -10 C (14 F). The line is the decade average. The most was 16 in 1950. Grey bars are years with under 90 percent of days observed, left out of rankings.
Nights at or below -10 C (14 F) per year in Seattle
YearDaysDecade average
194922
1950164.1
195114.1
195214.1
195564.1
195624.1
195724.1
195914.1
196212.3
196322.3
196422.3
196842.3
197232.5
197822.5
198212.3
198322.3
198522.3
198942.3
199044
200811
201011

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 C (14 F). Long bars mean a long season. 1949: 9 January 1949 to 10 January 19491950: 2 January 1950 to 3 February 19501951: 30 January 1951 to 30 January 19511952: 1 January 1952 to 1 January 19521955: 4 March 1955 to 15 November 19551956: 15 February 1956 to 16 February 19561957: 26 January 1957 to 27 January 19571959: 3 January 1959 to 3 January 19591962: 21 January 1962 to 21 January 19621963: 11 January 1963 to 12 January 19631964: 16 December 1964 to 17 December 19641968: 28 December 1968 to 31 December 19681972: 27 January 1972 to 8 December 19721978: 30 December 1978 to 31 December 19781982: 6 January 1982 to 6 January 19821983: 22 December 1983 to 23 December 19831985: 22 November 1985 to 23 November 19851989: 2 February 1989 to 5 February 19891990: 20 December 1990 to 29 December 19902008: 20 December 2008 to 20 December 20082010: 24 November 2010 to 24 November 20101949195219571963197219831990JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Seattle meeting -10 C (14 F). Long bars mean a long season.
First to last qualifying date each year in Seattle
YearFirst dateLast date
19491949-01-091949-01-10
19501950-01-021950-02-03
19511951-01-301951-01-30
19521952-01-011952-01-01
19551955-03-041955-11-15
19561956-02-151956-02-16
19571957-01-261957-01-27
19591959-01-031959-01-03
19621962-01-211962-01-21
19631963-01-111963-01-12
19641964-12-161964-12-17
19681968-12-281968-12-31
19721972-01-271972-12-08
19781978-12-301978-12-31
19821982-01-061982-01-06
19831983-12-221983-12-23
19851985-11-221985-11-23
19891989-02-021989-02-05
19901990-12-201990-12-29
20082008-12-202008-12-20
20102010-11-242010-11-24

Every Year

Nights at or below -10 C (14 F) per year in Seattle
YearDaysFirst dateLast dateLongest streak in yearCoverage
2010124 November 201024 November 20101 daysComplete
2008120 December 200820 December 20081 daysComplete
1990420 December 199029 December 19902 daysComplete
198942 February 19895 February 19894 daysComplete
1985222 November 198523 November 19852 daysComplete
1983222 December 198323 December 19832 daysComplete
198216 January 19826 January 19821 daysComplete
1978230 December 197831 December 19782 daysComplete
1972327 January 19728 December 19722 daysComplete
1968428 December 196831 December 19684 daysComplete
1964216 December 196417 December 19642 daysComplete
1963211 January 196312 January 19632 daysComplete
1962121 January 196221 January 19621 daysComplete
195913 January 19593 January 19591 daysComplete
1957226 January 195727 January 19572 daysComplete
1956215 February 195616 February 19562 daysComplete
195564 March 195515 November 19554 daysComplete
195211 January 19521 January 19521 daysComplete
1951130 January 195130 January 19511 daysComplete
1950162 January 19503 February 19507 daysComplete
194929 January 194910 January 19492 daysComplete
Decade averages for Nights at or below -10 C (14 F) in Seattle
DecadeAverage days per yearYears counted
1940s2.01
1950s4.17
1960s2.34
1970s2.52
1980s2.34
1990s4.01
2000s1.01
2010s1.01

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 Nights at or below -10 C (14 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).