Grand Lake St. Marys SPB Weather Forecast

    • 28
    • 38

    Rain/Snow

    • 32
    • 38

    Mostly Cloudy

    • 41
    • 49

    Mostly Sunny

    • 49
    • 53

    Chance Rain Showers

    • 38
    • 55

    Rain Showers

    • 29
    • 43

    Rain Showers Likely

Today 5 Dec Mercer

Rain and snow Showers. Highs in the upper 30s. South Winds around 5 Mph, becoming north late. Chance of precipitation 80 percent.

Tonight 5 Dec Mercer

Mostly cloudy. A chance of rain Showers and snow in the evening. Lows in the upper 20s. North Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Lake St. Marys SPB Temperature Statistics

December Temperature

Versailles Darke County Airport (23 miles)

  • Lowest 3 December, 2023

    35.6 °F

  • Average December

    42.9 °F

  • Highest 1 December, 2023

    48.2 °F

Climate (2018–Present)

Versailles Darke County Airport (23 miles)

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  • Average Low 2018–2023

    43.2 °F

  • Average 2018–2023

    52.1 °F

  • Average High 2018–2023

    61.4 °F
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