Grand Lake St. Marys SPB Weather Forecast

    • 38
    • 57

    Mostly Sunny

    • 49
    • 59

    Partly Sunny

    • 36
    • 65

    Mostly Sunny

    • 45
    • 55

    Mostly Cloudy

    • 41
    • 60

    Rain Likely

    • 41
    • 51

    Chance Rain

    • 31
    • 47

    Mostly Cloudy

Today 3 Nov Mercer

Mostly sunny. Highs in the upper 50s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 3 Nov Mercer

Mostly clear. Lows in the mid 30s. West Winds 5 to 10 Mph.

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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 1 November, 2025

    35.6 °F

  • Average November

    44.5 °F

  • Highest 1 November, 2025

    55.4 °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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