Millersylvania State Park Weather Forecast

    • 33
    • 49

    Mostly Sunny

    • 32
    • 49

    Mostly Sunny

    • 31
    • 49

    Mostly Sunny

    • 31
    • 48

    Mostly Cloudy

    • 36
    • 47

    Mostly Cloudy

    • 34
    • 46

    Chance Rain/Snow

Today 17 Jan Lowlands of Lewis and Southern Thurston Counties

Sunny. Patchy dense fog in the morning. Highs near 50. Light wind.

Tonight 17 Jan Lowlands of Lewis and Southern Thurston Counties

Mostly clear. Patchy dense fog after midnight. Lows in the lower to mid 30s. Light wind.

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Millersylvania State Park Temperature Statistics

January Temperature

Olympia, Olympia Airport (3.7 miles)

  • Lowest 1 January, 2026

    30.9 °F

  • Average January

    43.5 °F

  • Highest 13 January, 2026

    57 °F

Climate (2021–Present)

Olympia, Olympia Airport (3.7 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    62.1 °F
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