Meramec State Park Weather Forecast

    • 57
    • 72

    Decreasing Clouds

    • 65
    • 85

    Mostly Sunny

    • 45
    • 86

    Rain

    • 42
    • 56

    Rain Likely

    • 45
    • 58

    Chance Rain

    • 52
    • 74

    Rain Likely

Today 29 Mar Franklin

Mostly sunny. Not as cool with Highs in the lower 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 29 Mar Franklin

Cloudy and not as cool. Near steady temperature in the lower 40s. South Winds around 5 Mph with Gusts up to 20 Mph.

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Meramec State Park Temperature Statistics

March Temperature

Washington Regional Airport (26.1 miles)

  • Lowest 16 March, 2026

    21.2 °F

  • Average March

    55.7 °F

  • Highest 26 March, 2026

    95 °F

Climate (2021–Present)

Washington Regional Airport (26.1 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    69.4 °F
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