Meramec State Park Weather Forecast

    • 71
    • 90

    Rain Showers

    • 70
    • 86

    Rain Showers

    • 70
    • 86

    Chance Thunderstorms

    • 72
    • 91

    Mostly Sunny

    • 74
    • 94

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

Today 5 Aug Franklin

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 80s. South Winds around 5 Mph. Chance of rain 30 percent.

Tonight 5 Aug Franklin

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then Showers with Thunderstorms likely after midnight. Some Thunderstorms may produce heavy rainfall. Lows around 70. Southeast Winds around 5 Mph. Chance of rain 90 percent.

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Meramec State Park Temperature Statistics

August Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 3 August, 2026

    62.6 °F

  • Average August

    73.2 °F

  • Highest 3 August, 2026

    87.8 °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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