Snow in City of Sammamish, Washington Winter storm alerts · 7-day snow forecast · average snowfall
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City of Sammamish averages 3.8 inches of snow a year. The snowiest month is December (1.7″), and snow usually falls from November through February. On about 2 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 2 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
November
0.2″
<1
<1
3
41°F
December
1.7″
1
1
7
37°F
January
0.9″
<1
1
7
37°F
February
1.0″
1
1
6
37°F
March
0″
0
0
2
39°F
Year
3.8″
2
2
25
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Seattle Sand Pt Wsfo (12 mi from the city center, -413 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
3.8 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Seattle Sand Pt Wsfo station, 12 miles away). The snowiest month is December with 1.7 inches.
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How many freezing nights does City of Sammamish have?
About 25 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, February, averages a low of 37 °F.