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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.

This Afternoon
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
This Afternoon 73°F Mostly Sunny 1 mph NW 0%
Tonight 50°F Mostly Clear 1 mph NNW 0%
Sunday 73°F Mostly Sunny 2 mph NW 0%
Sunday Night 50°F Partly Cloudy 1 mph NNW 0%
Monday 71°F Partly Sunny 2 mph NW 0%
Monday Night 50°F Partly Cloudy 2 mph N 1%
Tuesday 68°F Partly Sunny 1 mph NNW 1%
Tuesday Night 48°F Mostly Cloudy 2 mph NE 13%
Wednesday 67°F Partly Sunny then Slight Chance Light Rain 1 mph SE 16%
Wednesday Night 48°F Slight Chance Light Rain then Mostly Cloudy 1 mph NNE 16%
Thursday 64°F Mostly Cloudy then Slight Chance Light Rain 2 mph NNE 21%
Thursday Night 47°F Slight Chance Light Rain 2 mph NNW 21%
Friday 63°F Slight Chance Light Rain 1 mph NW 20%
Friday Night 45°F Slight Chance Light Rain 1 mph NE 20%

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.