Onalaska, WA Weather & Growing Conditions
Overnight
40°F
Mostly Clear
Mostly clear, with a low around 40. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 40°F | Mostly Clear | 3 mph SE | 2% |
| Wednesday | 55°F | Mostly Cloudy then Light Rain Likely | 2 to 8 mph SSE | 68% |
| Wednesday Night | 45°F | Light Rain | 6 to 12 mph S | 92% |
| Thursday | 54°F | Chance Light Rain then Partly Sunny | 3 to 7 mph S | 29% |
| Thursday Night | 44°F | Mostly Cloudy then Light Rain Likely | 3 to 9 mph SSE | 60% |
| Friday | 53°F | Light Rain | 3 to 13 mph SSE | 77% |
| Friday Night | 47°F | Light Rain Likely | 3 to 7 mph SE | 66% |
| Saturday | 62°F | Partly Sunny then Chance Light Rain | 5 mph SSE | 27% |
| Saturday Night | 48°F | Light Rain | 2 to 17 mph S | 81% |
| Sunday | 54°F | Light Rain Likely | 0 to 12 mph SSW | 63% |
| Sunday Night | 42°F | Slight Chance Light Rain | 0 to 5 mph E | 15% |
| Monday | 55°F | Chance Light Rain | 3 mph SE | 39% |
| Monday Night | 46°F | Chance Light Rain | 1 to 14 mph SSE | 50% |
| Tuesday | 56°F | Chance Light Rain | 3 to 14 mph SSE | 51% |
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 Nov 4, 2026.