Onalaska, WA Weather & Growing Conditions
Tonight
37°F
Partly Cloudy
Partly cloudy, with a low around 37. East southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Partly Cloudy | 2 mph ESE | 4% |
| Wednesday | 57°F | Partly Sunny then Chance Light Rain | 3 mph S | 46% |
| Wednesday Night | 44°F | Light Rain | 2 to 9 mph S | 99% |
| Thursday | 55°F | Chance Light Rain then Partly Sunny | 1 to 5 mph S | 29% |
| Thursday Night | 43°F | Light Rain | 1 to 8 mph SSE | 76% |
| Friday | 55°F | Light Rain | 2 to 10 mph SSE | 76% |
| Friday Night | 44°F | Chance Light Rain | 5 mph SSE | 41% |
| Saturday | 63°F | Mostly Cloudy then Chance Light Rain | 3 mph SSE | 30% |
| Saturday Night | 47°F | Light Rain Likely | 3 to 16 mph S | 72% |
| Sunday | 56°F | Light Rain Likely | 0 to 9 mph SW | 72% |
| Sunday Night | 41°F | Slight Chance Light Rain | 0 to 3 mph ESE | 23% |
| Monday | 56°F | Chance Light Rain | 5 mph SE | 50% |
| Monday Night | 44°F | Light Rain Likely | 3 to 13 mph SSE | 66% |
| Tuesday | 58°F | Light Rain Likely | 5 to 12 mph SSE | 66% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Onalaska, WA
Last spring frost
Apr 5
First fall frost
Oct 25
Growing season
196 days
Hardiness zone
8a
Explore more for Onalaska, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Toledo Faa Ap, Wa (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.