Meramec State Park Weather Forecast

    • 73
    • 91

    Increasing Clouds

    • 62
    • 93

    Rain Showers

    • 62
    • 83

    Chance Thunderstorms

    • 66
    • 85

    Rain Showers

    • 57
    • 78

    Chance Thunderstorms

    • 55
    • 75

    Slight Chance Thunderstorms

Today 10 Jun Franklin

Sunny. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 101.

Tonight 10 Jun Franklin

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 70s. Southwest Winds 10 to 15 Mph, becoming south around 5 Mph after midnight. Heat index Values up to 100 early in the evening.

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Meramec State Park Temperature Statistics

June Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 3 June, 2026

    53.6 °F

  • Average June

    75.4 °F

  • Highest 5 June, 2026

    87.8 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.7 °F
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