Grundy Lake Number One Weather Forecast

    • 39
    • 49

    Mostly Cloudy

    • 30
    • 55

    Rain Showers

    • 29
    • 41

    Mostly Sunny

    • 41
    • 53

    Chance Rain Showers

    • 40
    • 55

    Chance Rain Showers

    • 42
    • 56

    Mostly Cloudy

Today 17 Dec Grundy

Mostly cloudy. Highs in the lower 50s. Southwest Winds around 5 Mph.

Tonight 17 Dec Grundy

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 30s. South Winds 5 to 10 Mph. Gusts up to 25 Mph after midnight.

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Grundy Lake Number One Temperature Statistics

December Temperature

Winchester Municipal Airport (20.5 miles)

  • Lowest 14 December, 2025

    14 °F

  • Average December

    37.9 °F

  • Highest 13 December, 2025

    62.6 °F

Climate (2020–Present)

Winchester Municipal Airport (20.5 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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