Meramec State Park Weather Forecast

    • 25
    • 40

    Sunny

    • 38
    • 54

    Mostly Sunny

    • 38
    • 61

    Mostly Cloudy

    • 19
    • 44

    Partly Sunny

    • 29
    • 41

    Partly Sunny

    • 24
    • 43

    Mostly Cloudy

Today 11 Jan Franklin

Sunny. Highs around 40. Northwest Winds 5 to 10 Mph.

Tonight 11 Jan Franklin

Clear. Lows in the mid 20s. Southwest Winds 5 to 10 Mph.

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Meramec State Park Temperature Statistics

January Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 4 January, 2026

    21.2 °F

  • Average January

    43.2 °F

  • Highest 6 January, 2026

    68 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    69.2 °F
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