Custer, WA Weather & Growing Conditions
Tonight
37°F
Partly Cloudy
Partly cloudy, with a low around 37. Northeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Partly Cloudy | 1 mph NE | 4% |
| Wednesday | 57°F | Mostly Sunny then Chance Light Rain | 1 mph ESE | 27% |
| Wednesday Night | 47°F | Light Rain | 1 to 7 mph SE | 91% |
| Thursday | 56°F | Chance Light Rain | 5 to 8 mph S | 38% |
| Thursday Night | 47°F | Light Rain | 5 to 10 mph SE | 89% |
| Friday | 55°F | Light Rain | 8 to 15 mph SSE | 89% |
| Friday Night | 45°F | Chance Light Rain | 3 to 8 mph ESE | 44% |
| Saturday | 59°F | Chance Light Rain | 7 mph ESE | 51% |
| Saturday Night | 49°F | Light Rain | 7 to 16 mph SSE | 82% |
| Sunday | 55°F | Light Rain Likely | 6 to 13 mph S | 73% |
| Sunday Night | 42°F | Chance Light Rain | 6 mph SE | 33% |
| Monday | 54°F | Light Rain Likely | 6 mph E | 58% |
| Monday Night | 46°F | Light Rain | 6 to 10 mph ESE | 78% |
| Tuesday | 57°F | Light Rain | 12 mph SE | 78% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Custer, WA
Last spring frost
Mar 31
First fall frost
Nov 4
Growing season
219 days
Hardiness zone
8b
Explore more for Custer, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Blaine, Wa (8.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.