Onalaska Weather Forecast

    • 47
    • 70

    Becoming Sunny

    • 53
    • 80

    Mostly Sunny

    • 58
    • 90

    Mostly Sunny

    • 57
    • 92

    Mostly Sunny

    • 55
    • 88

    Mostly Sunny

    • 53
    • 83

    Mostly Sunny

Today 2 Aug Foothills and Valleys of Thurston and Lewis Counties

Partly sunny. Highs near 70. Light wind.

Tonight 2 Aug Foothills and Valleys of Thurston and Lewis Counties

Mostly clear. Lows near 50. Light wind.

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Onalaska Temperature Statistics

August Temperature

Chehalis-Centralia Airport (14.3 miles)

  • Lowest

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  • Average August

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Climate (2021–2026)

Chehalis-Centralia Airport (14.3 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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