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Big Lake, WA Weather & Growing Conditions

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

This Afternoon
72°F
Mostly Sunny
Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. West northwest wind around 3 mph.

7-day forecast for Big Lake

WhenTempForecastWindPrecip
This Afternoon 72°F Mostly Sunny 3 mph WNW 0%
Tonight 52°F Mostly Clear 1 mph W 0%
Sunday 73°F Mostly Sunny 0 to 3 mph WSW 0%
Sunday Night 51°F Mostly Cloudy 2 mph S 0%
Monday 71°F Partly Sunny 0 to 3 mph SW 0%
Monday Night 52°F Partly Cloudy 0 to 3 mph SSE 0%
Tuesday 68°F Partly Sunny 3 mph SSE 1%
Tuesday Night 51°F Mostly Cloudy 3 mph SSE 12%
Wednesday 66°F Partly Sunny 2 mph SSW 13%
Wednesday Night 49°F Mostly Cloudy 2 mph SW 11%
Thursday 64°F Mostly Cloudy then Slight Chance Light Rain 0 to 5 mph NNW 15%
Thursday Night 49°F Chance Light Rain 3 mph NNW 27%
Friday 64°F Chance Light Rain 1 to 5 mph WNW 27%
Friday Night 48°F Slight Chance Light Rain 3 mph NNE 23%

Forecast source: National Weather Service (api.weather.gov) for Big Lake (48.396, -122.243). Updated through the day.

Growing snapshot for Big Lake

Last spring frost
Mar 27
First fall frost
Nov 6
Growing season
224 days
Hardiness zone
8b

More local growing data for Big Lake: nearby ZIP 98235 weather · frost dates · planting calendar · Washington frost dates

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Climate data from the nearest NOAA station, Sedro-Woolley, Wa (2.3 mi from Big Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.