Meramec State Park Weather Forecast

    • 61
    • 83

    Increasing Clouds

    • 64
    • 84

    Partly Sunny

    • 47
    • 81

    Rain Showers

    • 43
    • 66

    Sunny

    • 54
    • 74

    Slight Chance Rain Showers

    • 43
    • 73

    Mostly Sunny

Today 16 Oct Franklin

Sunny. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 16 Oct Franklin

Mostly cloudy. Lows in the lower 60s. Southeast Winds around 5 Mph. Gusts up to 20 Mph after midnight.

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Meramec State Park Temperature Statistics

October Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 9 October, 2025

    44.6 °F

  • Average October

    66.7 °F

  • Highest 2 October, 2025

    89.6 °F

Climate (2020–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    68.9 °F
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