Grand Lake Saint Marys State Park Weather Forecast

    • 26
    • 42

    Mostly Sunny

    • 41
    • 44

    Rain

    • 27
    • 50

    Rain

    • 33
    • 38

    Mostly Cloudy

    • 36
    • 51

    Mostly Cloudy

    • 27
    • 43

    Mostly Cloudy

Today 29 Jan Mercer

Sunny. Near steady temperature in the lower 40s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 29 Jan Mercer

Mostly clear. Cold with Lows in the mid 20s. West Winds 5 to 10 Mph, becoming southwest after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Lake Saint Marys State Park Temperature Statistics

January Temperature

Versailles Darke County Airport (22.4 miles)

  • Lowest 21 January, 2025

    -5.8 °F

  • Average January

    20.6 °F

  • Highest 17 January, 2025

    37.4 °F

Climate (2020–Present)

Versailles Darke County Airport (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    61.4 °F
Get WillyWeather+ to remove ads