Onalaska, WA Weather & Growing Conditions
Today
57°F
Mostly Cloudy then Light Rain Likely
Rain likely after 4pm. Mostly cloudy. High near 57, with temperatures falling to around 54 in the afternoon. South southeast wind 1 to 7 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 57°F | Mostly Cloudy then Light Rain Likely | 1 to 7 mph SSE | 66% |
| Tonight | 43°F | Light Rain | 3 to 10 mph SSW | 90% |
| Thursday | 56°F | Chance Light Rain then Partly Sunny | 2 to 6 mph S | 26% |
| Thursday Night | 41°F | Mostly Cloudy then Light Rain Likely | 2 to 7 mph SE | 59% |
| Friday | 55°F | Light Rain Likely | 2 to 10 mph SE | 74% |
| Friday Night | 45°F | Light Rain Likely | 2 to 6 mph SE | 64% |
| Saturday | 64°F | Partly Sunny then Chance Light Rain | 1 to 5 mph SSE | 26% |
| Saturday Night | 46°F | Light Rain | 2 to 14 mph S | 80% |
| Sunday | 56°F | Light Rain Likely | 0 to 8 mph SSW | 62% |
| Sunday Night | 40°F | Slight Chance Light Rain | 0 to 3 mph ENE | 15% |
| Monday | 57°F | Chance Light Rain | 3 mph SE | 38% |
| Monday Night | 44°F | Chance Light Rain | 1 to 12 mph SSE | 49% |
| Tuesday | 58°F | Chance Light Rain | 3 to 12 mph SSE | 50% |
| Tuesday Night | 45°F | Chance Light Rain | 3 to 12 mph SE | 47% |
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 (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.