Onalaska, WA Weather & Growing Conditions
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 2 mph NW | 0% |
| Tonight | 49°F | Mostly Clear | 1 mph N | 0% |
| Sunday | 73°F | Mostly Sunny | 0 to 3 mph NNW | 0% |
| Sunday Night | 49°F | Mostly Clear | 2 mph N | 0% |
| Monday | 70°F | Mostly Sunny | 0 to 3 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Tuesday | 66°F | Partly Sunny | 0 to 3 mph NW | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 3 mph NW | 3% |
| Wednesday | 66°F | Partly Sunny | 2 mph WNW | 3% |
| Wednesday Night | 48°F | Mostly Cloudy | 2 mph NNW | 2% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 3 mph N | 16% |
| Thursday Night | 47°F | Slight Chance Light Rain | 3 mph N | 16% |
| Friday | 61°F | Partly Sunny | 3 mph NNW | 12% |
| Friday Night | 45°F | Partly Cloudy | 3 mph NNE | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Onalaska, WA
Last spring frost
Apr 7
First fall frost
Nov 13
Growing season
215 days
Hardiness zone
8b
Explore more for Onalaska, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Mayfield Pwr Plt, Wa (9.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.