Seattle May Weather

Averages and records for weather in Seattle, Washington in the month of May.
Typical Seattle May Weather
1991–2020
Average daily high 65.4 °F
Average daily low 48.2 °F
Average monthly precipitation 1.9 inches
Average monthly snow none
Daily chance of precipitation 36.3%
Daily chance of snow 0%
Seattle May Weather Records
1894–2024
Highest temperature 93 °F May 21, 1963
Lowest temperature 28 °F May 1, 1954
Highest daily low 65 °F May 9, 1940
Lowest daily high 46 °F May 15, 1894
Hottest average high temperature 71.2 °F 1992
Coldest average high temperature 57.5 °F 1962
Most daily precipitation 1.8 inches May 29, 1969
Most monthly precipitation 4.8 inches 1948
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
May 1 62.2 45.4 85 28
May 2 62.4 45.6 88 33
May 3 62.7 45.8 85 35
May 4 62.9 46.0 85 33
May 5 63.1 46.2 86 36
May 6 63.2 46.4 87 36
May 7 63.4 46.6 82 33
May 8 63.6 46.8 84 36
May 9 63.8 46.9 86 37
May 10 64.1 47.1 87 37
May 11 64.3 47.3 87 35
May 12 64.5 47.5 88 38
May 13 64.8 47.7 92 37
May 14 65.0 47.9 90 36
May 15 65.2 48.1 88 38
May 16 65.3 48.2 87 40
May 17 65.6 48.4 90 39
May 18 65.8 48.6 89 37
May 19 66.0 48.8 88 38
May 20 66.3 49.0 92 40
May 21 66.5 49.1 93 39
May 22 66.6 49.4 86 37
May 23 66.8 49.5 90 37
May 24 67.0 49.8 89 37
May 25 67.1 49.9 89 37
May 26 67.2 50.0 89 40
May 27 67.2 50.2 89 37
May 28 67.3 50.3 92 38
May 29 67.4 50.4 85 35
May 30 67.5 50.5 88 36
May 31 67.5 50.6 90 35
Weather Station Details
Years Station Coordinates
1948–2024 Seattle Tacoma International Airport location
1894–1947 University of Washington location