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Chain Lake, WA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Chain Lake, a community in Snohomish County, Washington.

Today
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. Northwest wind around 1 mph.

7-day forecast for Chain Lake

WhenTempForecastWindPrecip
Today 73°F Mostly Sunny 1 mph NW 0%
Tonight 50°F Partly Cloudy 1 mph NNW 0%
Sunday 73°F Mostly Sunny 2 mph NNW 0%
Sunday Night 50°F Partly Cloudy 1 mph NNW 0%
Monday 71°F Mostly Sunny 2 mph NNW 0%
Monday Night 49°F Partly Cloudy 2 mph N 0%
Tuesday 68°F Partly Sunny 1 mph NW 0%
Tuesday Night 48°F Mostly Cloudy 1 mph NE 11%
Wednesday 67°F Partly Sunny then Slight Chance Light Rain 1 mph N 17%
Wednesday Night 49°F Slight Chance Light Rain then Mostly Cloudy 1 mph N 17%
Thursday 65°F Mostly Cloudy then Slight Chance Light Rain 2 mph NNW 19%
Thursday Night 47°F Slight Chance Light Rain 2 mph NNW 20%
Friday 64°F Slight Chance Light Rain 1 mph NNW 18%
Friday Night 46°F Slight Chance Light Rain 1 mph N 16%

Forecast source: National Weather Service (api.weather.gov) for Chain Lake (47.902, -121.987). Updated through the day.

Growing snapshot for Chain Lake

Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
8b

More local growing data for Chain Lake: nearby ZIP 98290 weather · frost dates · planting calendar · Washington frost dates

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Climate data from the nearest NOAA station, Monroe, Wa (7.6 mi from Chain Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.