Grundy Forest State Natural Area Weather Forecast

    • 33
    • 45

    Increasing Clouds

    • 37
    • 47

    Chance Rain Showers

    • 27
    • 41

    Mostly Cloudy

    • 35
    • 46

    Mostly Sunny

    • 35
    • 51

    Chance Rain Showers

    • 32
    • 49

    Chance Rain Showers

    • 19
    • 41

    Partly Sunny

Today 6 Dec Grundy

Sunny. Highs in the mid 40s. Northwest Winds around 5 Mph.

Tonight 6 Dec Grundy

Mostly clear. Areas of fog. Lows in the lower 30s. Southeast Winds around 5 Mph.

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  • Temperature Real-Time

Grundy Forest State Natural Area Temperature Statistics

December Temperature

Winchester Municipal Airport (18 miles)

  • Lowest 1 December, 2025

    26.6 °F

  • Average December

    35.8 °F

  • Highest 1 December, 2025

    50 °F

Climate (2020–Present)

Winchester Municipal Airport (18 miles)

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  • Average Low 2020–2025

    50.3 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    71 °F
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