Harman US

Arlington Heights, WA Weather & Growing Conditions

Today
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. West wind around 3 mph.

7-day forecast

WhenTempForecastWindPrecip
Today 73°F Mostly Sunny 3 mph W 0%
Tonight 52°F Mostly Clear 0 to 3 mph SSE 0%
Sunday 74°F Mostly Sunny 3 mph WSW 0%
Sunday Night 52°F Partly Cloudy 0 to 3 mph NNE 0%
Monday 70°F Mostly Sunny 1 to 5 mph W 0%
Monday Night 51°F Partly Cloudy 0 to 3 mph NNE 1%
Tuesday 67°F Partly Sunny 5 mph N 1%
Tuesday Night 50°F Mostly Cloudy 3 mph NE 11%
Wednesday 66°F Partly Sunny then Slight Chance Light Rain 3 mph SW 16%
Wednesday Night 50°F Slight Chance Light Rain then Mostly Cloudy 3 mph N 16%
Thursday 65°F Mostly Cloudy then Slight Chance Light Rain 1 to 5 mph NW 19%
Thursday Night 49°F Chance Light Rain 5 mph N 25%
Friday 64°F Chance Light Rain 3 mph NE 25%
Friday Night 47°F Slight Chance Light Rain 5 mph NE 16%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Arlington Heights, WA

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

Explore more for Arlington Heights, WA: full frost dates · planting calendar · Washington frost dates

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