St Marys River State Park Weather Forecast

    • 73
    • 88

    Rain Showers

    • 67
    • 87

    Rain Showers

    • 66
    • 80

    Mostly Sunny

    • 67
    • 82

    Chance Rain Showers

    • 68
    • 80

    Slight Chance Rain Showers

    • 71
    • 83

    Chance Thunderstorms

Today 21 Jul St. Marys

Mostly cloudy. Scattered Showers with isolated Thunderstorms late this Morning, then numerous Showers and Thunderstorms this afternoon. Some Thunderstorms may be severe with damaging Winds, large Hail, and heavy rainfall this afternoon. Highs in the upper 80s. Southwest Winds 15 to 20 Mph. Chance of rain 70 percent.

Tonight 21 Jul St. Marys

Showers. Numerous Thunderstorms, mainly in the evening. Some Thunderstorms may be severe with damaging Winds, large Hail, and heavy rainfall in the evening. Lows in the lower 70s. Southwest Winds 15 to 20 Mph. Chance of rain 90 percent.

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St Marys River State Park Temperature Statistics

July Temperature

St Marys County Airport (3.1 miles)

  • Lowest 13 July, 2026

    63.9 °F
  • Average July

    80.6 °F
  • Highest 3 July, 2026

    100 °F

Climate (2021–2026)

St Marys County Airport (3.1 miles)

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  • Average Low 2021–2026

    49.4 °F
  • Average 2021–2026

    58 °F
  • Average High 2021–2026

    66.9 °F
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