Cottonwood Lake Weather Forecast

    • 17
    • 42

    Decreasing Clouds

    • 17
    • 30

    Partly Sunny

    • 5
    • 28

    Partly Sunny

    • 3
    • 14

    Partly Sunny

    • 26
    • 37

    Partly Sunny

    • 27
    • 39

    Partly Sunny

Today 7 Jan McHenry

Mostly sunny. Highs around 40. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 7 Jan McHenry

Partly cloudy in the evening then clearing. Lows around 15. West Winds 10 to 15 Mph.

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Cottonwood Lake Temperature Statistics

January Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 1 January, 2026

    1.4 °F

  • Average January

    14.3 °F

  • Highest 4 January, 2026

    26.6 °F

Climate (2021–Present)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    51.9 °F
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