Grand Lake Saint Marys State Park Weather Forecast

    • 36
    • 45

    Mostly Cloudy

    • 30
    • 56

    Mostly Cloudy

    • 28
    • 37

    Mostly Cloudy

    • 32
    • 35

    Rain/Sleet

    • 21
    • 45

    Mostly Cloudy

    • 26
    • 31

    Mostly Cloudy

Today 2 Feb Mercer

Mostly cloudy with a 20 percent chance of rain. Highs in the mid 40s. Southwest Winds 10 to 15 Mph.

Tonight 2 Feb Mercer

Mostly cloudy. Lows in the mid 30s. Southwest Winds 5 to 10 Mph.

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Grand Lake Saint Marys State Park Temperature Statistics

February Temperature

Versailles Darke County Airport (22.4 miles)

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Climate (2020–Present)

Versailles Darke County Airport (22.4 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    61.5 °F
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