Meramec State Park Weather Forecast

    • 73
    • 98

    Hot

    • 73
    • 96

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 72
    • 96

    Partly Sunny

    • 70
    • 95

    Slight Chance Thunderstorms

    • 70
    • 93

    Partly Sunny

    • 73
    • 93

    Partly Sunny

Today 2 Sep Franklin

Sunny, hot. Near steady temperature in the mid 90s. Southwest Winds around 5 Mph. Heat index Values up to 105.

Tonight 2 Sep Franklin

Mostly clear. Lows in the mid 70s. South Winds around 5 Mph. Heat index Values up to 100 early in the evening.

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Meramec State Park Temperature Statistics

September Temperature

Washington Regional Airport (26.1 miles)

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Climate (2021–2026)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.6 °F
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