Meramec State Park Weather Forecast

    • 53
    • 74

    Sunny

    • 54
    • 79

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

    • 61
    • 81

    Mostly Cloudy

    • 51
    • 75

    Chance Thunderstorms

    • 49
    • 71

    Chance Rain Showers

Today 20 Apr Franklin

Sunny. Highs in the lower 70s. East Winds around 5 Mph, becoming south around 5 Mph in the afternoon.

Tonight 20 Apr Franklin

Mostly clear. Lows in the lower 40s. East Winds around 5 Mph.

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Meramec State Park Temperature Statistics

April Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 6 April, 2026

    35.6 °F

  • Average April

    64.7 °F

  • Highest 17 April, 2026

    86 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.5 °F
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