Grand Lake St. Marys SPB Weather Forecast

    • 34
    • 48

    Rain Likely

    • 38
    • 43

    Rain

    • 42
    • 48

    Mostly Cloudy

    • 47
    • 55

    Rain Likely

    • 38
    • 54

    Rain Likely

    • 36
    • 47

    Partly Sunny

    • 38
    • 50

    Partly Sunny

Today 17 Nov Mercer

Sunny. Highs in the upper 40s. West Winds around 5 Mph.

Tonight 17 Nov Mercer

Partly cloudy late this Evening, then becoming mostly cloudy. Rain likely. Lows in the lower 30s. Light and variable Winds, becoming east around 5 Mph late. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Lake St. Marys SPB Temperature Statistics

November Temperature

Versailles Darke County Airport (23 miles)

  • Lowest 10 November, 2025

    21.2 °F

  • Average November

    44.7 °F

  • Highest 15 November, 2025

    69.8 °F

Climate (2020–Present)

Versailles Darke County Airport (23 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.5 °F
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