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Onalaska, WA Weather Forecast
Onalaska, WA Weather Forecast Date: 236 PM PDT Wed Sep 02 2026
The area/counties/county of: Foothills And Valleys Of The Thurston And Lewis County Cascades, including the cities of: Randle, Packwood, and Morton.or toggle through each period.
Tonight... Mostly cloudy then becoming partly cloudy late in the evening then becoming mostly cloudy. A chance of rain in the evening, then a slight chance of rain late in the evening. A chance of rain after midnight. Lows in the mid 40s to lower 50s. South wind 10 to 15 mph with gusts to 30 mph.
Thursday... Mostly cloudy. Rain likely in the morning, then a chance of rain late in the morning. A chance of showers and a slight chance of thunderstorms in the afternoon. Rainfall amounts less than a tenth of an inch likely, except higher amounts possible in thunderstorms. Highs in the lower to mid 60s. South wind 10 to 15 mph Decreasing to 10 mph or less in the afternoon. Gusts to 25 mph.
Thursday Night... Mostly cloudy. A chance of rain in the evening. Lows in the mid 40s to lower 50s. Light wind.
Friday... Partly sunny. A chance of showers and a slight chance of thunderstorms in the afternoon. Highs in the mid 60s to lower 70s. Light wind.
Friday Night... Mostly cloudy. A slight chance of rain in the evening. Lows in the mid 40s to lower 50s. Light wind.
Saturday... Partly sunny. A chance of showers and a slight chance of thunderstorms in the afternoon. Highs in the lower 70s.
Saturday Night... Partly cloudy. Lows near 50.
Sunday... Mostly sunny. A slight chance of rain in the afternoon. Highs in the mid to upper 70s.
Sunday Night... Partly cloudy with a slight chance of rain. Lows in the lower 50s.
Labor Day... Mostly sunny with a slight chance of rain. Highs in the lower to mid 70s.
Monday Night... Partly cloudy. Lows in the lower 50s.
Tuesday... Partly sunny. Highs in the lower to mid 70s.
Tuesday Night... Mostly clear. Lows in the lower 50s.
POP = Probability of Precipitation
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