All-time weather records — Sammamish, WA

Record high
104.0°F
July 3, 1906
Record low
-31.0°F
February 21, 1982
Wettest day
7.50 in
November 20, 1985

Climate change signal in Sammamish

0%

of Sammamish's all-time daily heat records were set in the last decade (0 of 366 records since 2015).

0%

of all-time daily cold records were set in the last decade (0 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1890s
3
·
1900s
69
63
1910s
33
25
1920s
32
26
1930s
30
85
1940s
34
38
1950s
22
62
1960s
29
11
1970s
24
19
1980s
37
28
1990s
23
7
2000s
30
2
2010s
·
·
2020s
·
·

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1899, the latest in 2008. Period of observation: 1898-2022.

Records by month

Month Hottest day Coldest day Wettest day
January 66.9°F — Jan 20, 2005 -0.9°F — Jan 18, 1950 3.74 in — Jan 22, 1919
February 75.0°F — Feb 28, 1968 -31.0°F — Feb 21, 1982 4.43 in — Feb 28, 2022
March 81.0°F — Mar 15, 1900 8.1°F — Mar 5, 1955 4.63 in — Mar 5, 1972
April 90.0°F — Apr 19, 1934 24.1°F — Apr 3, 1935 3.60 in — Apr 11, 1899
May 97.0°F — May 28, 1983 21.0°F — May 26, 1930 2.00 in — May 29, 1969
June 99.0°F — Jun 18, 1982 28.9°F — Jun 18, 1930 2.42 in — Jun 1, 1968
July 104.0°F — Jul 3, 1906 30.0°F — Jul 12, 1901 1.60 in — Jul 2, 1916
August 102.0°F — Aug 9, 1960 35.1°F — Aug 19, 1945 2.02 in — Aug 14, 1899
September 98.1°F — Sep 7, 1981 25.0°F — Sep 28, 1929 2.72 in — Sep 16, 1947
October 95.0°F — Oct 1, 1987 16.0°F — Oct 31, 2000 3.76 in — Oct 29, 2021
November 75.0°F — Nov 2, 1949 1.9°F — Nov 15, 1955 7.50 in — Nov 20, 1985
December 66.9°F — Dec 26, 1980 3.0°F — Dec 28, 1990 5.10 in — Dec 20, 2019

Click a month to see every daily record for that month in Sammamish.