Grand Lake St. Marys SPB Weather Forecast

    • 39
    • 46

    Cloudy

    • 37
    • 46

    Mostly Cloudy

    • 35
    • 51

    Mostly Sunny

    • 37
    • 55

    Sunny

    • 41
    • 59

    Partly Sunny

    • 47
    • 62

    Partly Sunny

    • 47
    • 63

    Partly Sunny

Today 14 Nov Mercer

Partly cloudy in the Morning, then clearing. Highs in the upper 60s.

Tonight 14 Nov Mercer

Cloudy. A slight chance of Showers after midnight. Lows in the upper 30s. Northwest Winds 5 to 10 Mph. Chance of rain 20 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 8 November, 2026

    33.8 °F

  • Average November

    52.2 °F

  • Highest 3 November, 2026

    73.4 °F

Climate (2021–2026)

Versailles Darke County Airport (23 miles)

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  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    61.9 °F
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