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Arlington Heights, WA Weather & Growing Conditions

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

This Afternoon
75°F
Mostly Sunny
Mostly sunny. High near 75, with temperatures falling to around 73 in the afternoon. West wind around 3 mph.

7-day forecast for Arlington Heights

WhenTempForecastWindPrecip
This Afternoon 75°F Mostly Sunny 3 mph W 0%
Tonight 51°F Mostly Clear 0 to 3 mph S 0%
Sunday 76°F Mostly Sunny 3 mph SSW 0%
Sunday Night 51°F Partly Cloudy 2 mph NNW 0%
Monday 73°F Partly Sunny 0 to 3 mph WNW 0%
Monday Night 49°F Partly Cloudy 0 to 3 mph N 0%
Tuesday 70°F Partly Sunny 3 mph NNW 1%
Tuesday Night 49°F Mostly Cloudy 0 to 3 mph NE 11%
Wednesday 68°F Slight Chance Light Rain 2 mph SSW 15%
Wednesday Night 47°F Mostly Cloudy 2 mph NNW 11%
Thursday 66°F Mostly Cloudy then Slight Chance Light Rain 0 to 5 mph N 18%
Thursday Night 48°F Slight Chance Light Rain 1 to 5 mph N 19%
Friday 66°F Slight Chance Light Rain 1 to 5 mph NW 21%
Friday Night 45°F Slight Chance Light Rain 5 mph NE 23%

Forecast source: National Weather Service (api.weather.gov) for Arlington Heights (48.212, -122.063). Updated through the day.

Growing snapshot for Arlington Heights

Last spring frost
Apr 22
First fall frost
Oct 19
Growing season
181 days
Hardiness zone
8b

More local growing data for Arlington Heights: nearby ZIP 98223 weather · frost dates · planting calendar · Washington frost dates

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Climate data from the nearest NOAA station, Arlington, Wa (8.1 mi from Arlington Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.