Meramec State Park Weather Forecast

    • 43
    • 76

    Sunny

    • 58
    • 75

    Chance Thunderstorms

    • 65
    • 85

    Chance Thunderstorms

    • 65
    • 87

    Chance Thunderstorms

    • 70
    • 90

    Partly Sunny

    • 67
    • 92

    Rain Showers Likely

Today 13 May Franklin

Sunny. Highs in the mid 70s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 13 May Franklin

Clear. Patchy fog after midnight. Cooler with Lows in the mid 40s. North Winds 5 to 10 Mph in the Evening, becoming light and variable.

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Meramec State Park Temperature Statistics

May Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 7 May, 2026

    39.2 °F

  • Average May

    59.9 °F

  • Highest 4 May, 2026

    84.2 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.6 °F
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