Grundy Forest State Natural Area Weather Forecast

    • 36
    • 49

    Rain Showers Likely

    • 35
    • 49

    Increasing Clouds

    • 25
    • 40

    Wintry Mix

    • 27
    • 31

    Wintry Mix

    • 9
    • 34

    Wintry Mix Likely

    • 4
    • 22

    Partly Sunny

    • 14
    • 32

    Partly Sunny

Today 21 Jan Grundy

Showers likely. Near steady temperature in the upper 40s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 21 Jan Grundy

Cloudy. Showers Likely, mainly in the evening. Lows in the mid 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming west after midnight. Chance of rain 70 percent.

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Grundy Forest State Natural Area Temperature Statistics

January Temperature

Winchester Municipal Airport (18 miles)

  • Lowest 15 January, 2026

    17.6 °F

  • Average January

    44.1 °F

  • Highest 7 January, 2026

    68 °F

Climate (2021–Present)

Winchester Municipal Airport (18 miles)

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  • Average Low 2021–2026

    50.4 °F

  • Average 2021–2026

    60.9 °F

  • Average High 2021–2026

    71.1 °F
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