Meramec State Park Weather Forecast

    • 66
    • 75

    Rain Showers

    • 47
    • 83

    Rain Showers

    • 38
    • 55

    Mostly Cloudy

    • 36
    • 60

    Sunny

    • 40
    • 68

    Partly Sunny

    • 44
    • 73

    Partly Sunny

    • 50
    • 76

    Partly Sunny

Today 14 Oct Franklin

Sunny. A slight chance of Showers in the afternoon. Highs around 80. Chance of rain 20 percent.

Tonight 14 Oct Franklin

Cloudy. A chance of rain this Evening, then Showers likely with a chance of Thunderstorms after midnight. Lows in the mid 60s. Light and variable Winds, becoming east around 5 Mph after midnight. Chance of rain 70 percent.

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Meramec State Park Temperature Statistics

October Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 6 October, 2026

    44.6 °F

  • Average October

    66.8 °F

  • Highest 12 October, 2026

    93.2 °F

Climate (2021–2026)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.7 °F
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