Climate

Seattle weather by month

Average highs, lows, rain and snow for every month, from 30 years of weather records.

Average temperatures

Best time to visit: June, July, August, when highs are mild and rain is lightest.

Month	High	Low	Rain	Snow	Wet days
January	47°F	37°F	5.1 in	0.90 in	19
February	50°F	37°F	3.5 in	1.0 in	16
March	54°F	39°F	3.9 in	0.00 in	18
April	59°F	43°F	3.0 in	0.00 in	16
May	65°F	48°F	2.2 in	0.00 in	12
June	70°F	53°F	1.6 in	0.00 in	11
July	77°F	57°F	0.80 in	0.00 in	5
August	77°F	57°F	1.0 in	0.00 in	6
September	71°F	53°F	1.7 in	0.00 in	9
October	61°F	47°F	3.6 in	0.00 in	15
November	52°F	41°F	5.8 in	0.20 in	19
December	47°F	37°F	5.5 in	1.7 in	20

NOAA U.S. Climate Normals 1991–2020, Seattle Sand Pt Wsfo, Wa Us (6.5 mi away, 60 ft). Wet days: days with at least 0.01 in of precipitation.

What is the hottest month in Seattle?

August, with an average high of 77°F and low of 57°F.

What is the coldest month in Seattle?

February, with an average low of 37°F and high of 50°F.

When does it rain most in Seattle?

November is the wettest month, averaging 5.8 in of precipitation; the year totals about 37.7 inches.

Does it snow in Seattle?

Yes. Snowfall averages about 4 inches a year, mostly in December and February.

What is the best time to visit Seattle?

For mild weather (highs between 65°F and 85°F) with the least rain, June, July, August.

Where do these numbers come from?

NOAA’s 1991–2020 U.S. Climate Normals for the Seattle Sand Pt Wsfo weather station, 6.5 miles from downtown: 30-year averages, not a forecast.