Sammamish, WA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Sammamish, a city in King County, Washington.

This Afternoon

73°F

Mostly Sunny

Mostly sunny, with a high near 73. Northwest wind around 1 mph.

7-day forecast for Sammamish

When	Temp	Forecast	Wind	Precip
This Afternoon	73°F	Mostly Sunny	1 mph NW	0%
Tonight	50°F	Mostly Clear	0 mph	0%
Sunday	74°F	Mostly Sunny	2 mph NNW	0%
Sunday Night	50°F	Partly Cloudy	1 mph N	0%
Monday	71°F	Partly Sunny	1 mph NNW	0%
Monday Night	50°F	Partly Cloudy	1 mph N	1%
Tuesday	68°F	Mostly Cloudy	1 mph N	1%
Tuesday Night	48°F	Mostly Cloudy	1 mph SSE	10%
Wednesday	66°F	Partly Sunny	1 mph SSW	14%
Wednesday Night	48°F	Mostly Cloudy	0 mph	14%
Thursday	63°F	Mostly Cloudy then Slight Chance Light Rain	2 mph N	20%
Thursday Night	48°F	Slight Chance Light Rain	2 mph NNW	20%
Friday	62°F	Slight Chance Light Rain	2 mph NNW	24%
Friday Night	45°F	Slight Chance Light Rain then Mostly Cloudy	1 mph NNW	19%

Forecast source: National Weather Service (api.weather.gov) for Sammamish (47.594, -122.038). Updated through the day.

Growing snapshot for Sammamish

Last spring frost

Mar 30

First fall frost

Nov 7

Growing season

223 days

Hardiness zone

More local growing data for Sammamish: nearby ZIP 98075 weather · frost dates · planting calendar · Washington frost dates

Nearby towns & communities

Algona Ames Lake Auburn Baring Beaux Arts Village Bellevue Black Diamond Bothell Boulevard Park Bryn Mawr-Skyway Burien Carnation Clyde Hill Cottage Lake Covington Des Moines Duvall East Renton Highlands Fairwood Fall City Federal Way Greenwater High Bridge Hobart Hunts Point Index Issaquah Kenmore Kent Kirkland

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Climate data from the nearest NOAA station, Snoqualmie Falls, Wa (9.9 mi from Sammamish). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.