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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.