Millersylvania State Park Weather Forecast

    • 47
    • 74

    Mostly Cloudy

    • 47
    • 74

    Chance Rain

    • 46
    • 58

    Rain Likely

    • 42
    • 57

    Rain Likely

    • 40
    • 66

    Mostly Sunny

    • 42
    • 70

    Mostly Sunny

    • 42
    • 69

    Mostly Sunny

Today 19 Apr Lowlands of Lewis and Southern Thurston Counties

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

Tonight 19 Apr Lowlands of Lewis and Southern Thurston Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s. Light wind.

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Millersylvania State Park Temperature Statistics

April Temperature

Olympia, Olympia Airport (3.7 miles)

  • Lowest 16 April, 2026

    27.6 °F

  • Average April

    48.2 °F

  • Highest 6 April, 2026

    75.7 °F

Climate (2021–Present)

Olympia, Olympia Airport (3.7 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.2 °F
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