Meramec State Park Weather Forecast

    • 62
    • 82

    Partly Sunny

    • 62
    • 82

    Chance Rain Showers

    • 65
    • 79

    Chance Thunderstorms

    • 72
    • 90

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 73
    • 97

    Hot

Today 22 Jul Franklin

Sunny. Near steady temperature around 80. North Winds around 5 Mph.

Tonight 22 Jul Franklin

Partly cloudy in the Evening, then clearing. Lows in the lower 60s. Northeast Winds around 5 Mph.

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Meramec State Park Temperature Statistics

July Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 13 July, 2026

    64.4 °F

  • Average July

    79.9 °F

  • Highest 2 July, 2026

    95 °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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