Meramec State Park Weather Forecast

    • 15
    • 37

    Increasing Clouds

    • 9
    • 28

    Chance Snow

    • 4
    • 22

    Mostly Cloudy

    • 3
    • 19

    Partly Sunny

    • 18
    • 31

    Partly Sunny

    • 23
    • 39

    Partly Sunny

    • 29
    • 42

    Chance Rain/Snow

Today 28 Jan Franklin

Sunny. Highs in the mid 30s. West Winds 5 to 10 Mph.

Tonight 28 Jan Franklin

Partly cloudy this Evening, then becoming mostly cloudy. Not as cool with Lows around 14. Southwest Winds around 5 Mph, becoming northeast after midnight.

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Meramec State Park Temperature Statistics

January Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 26 January, 2026

    -4 °F

  • Average January

    32.8 °F

  • Highest 6 January, 2026

    68 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69.1 °F
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