St Marys River State Park Weather Forecast

    • 73
    • 91

    Rain Showers

    • 66
    • 83

    Chance Rain Showers

    • 63
    • 81

    Partly Sunny

    • 63
    • 80

    Mostly Sunny

    • 65
    • 83

    Partly Sunny

    • 72
    • 87

    Partly Sunny

    • 68
    • 91

    Slight Chance Thunderstorms

Today 4 Sep St. Marys

Mostly sunny with a slight chance of Showers and Thunderstorms. Hot with Highs in the lower 90s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 4 Sep St. Marys

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a chance of Showers after midnight. Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Real-Time

St Marys River State Park Temperature Statistics

September Temperature

St Marys County Airport (3.1 miles)

  • Lowest 2 September, 2026

    71.1 °F

  • Average September

    79.9 °F

  • Highest 1 September, 2026

    93.9 °F

Climate (2021–2026)

St Marys County Airport (3.1 miles)

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  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    67 °F
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