Millersylvania State Park Weather Forecast

    • 48
    • 78

    Becoming Sunny

    • 52
    • 82

    Mostly Sunny

    • 56
    • 89

    Sunny

    • 58
    • 92

    Mostly Sunny

    • 56
    • 90

    Mostly Sunny

    • 55
    • 89

    Mostly Sunny

Today 20 Aug Lowlands of Lewis and Southern Thurston Counties

Mostly sunny. Highs in the mid 70s to lower 80s. Light wind.

Tonight 20 Aug Lowlands of Lewis and Southern Thurston Counties

Clear. Lows in the mid 40s to lower 50s. Light wind.

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Millersylvania State Park Temperature Statistics

August Temperature

Olympia, Olympia Airport (3.7 miles)

  • Lowest 3 August, 2025

    46.7 °F

  • Average August

    66.7 °F

  • Highest 12 August, 2025

    95.6 °F

Climate (2020–Present)

Olympia, Olympia Airport (3.7 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    62 °F
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