Thornton Weather Forecast

    • 24
    • 27

    Chance Wintry Mix

    • 25
    • 30

    Snow Likely

    • 9
    • 29

    Snow Likely

    • 14
    • 22

    Chance Snow

    • 30
    • 35

    Rain/Snow Likely

    • 16
    • 36

    Chance Rain/Snow

Today 5 Dec Southern Cook

Mostly cloudy. Highs in the mid 20s. Southwest Winds 10 to 15 Mph.

Tonight 5 Dec Southern Cook

Mostly cloudy. A chance of snow in the late evening and early morning. Patchy freezing drizzle in the late evening and overnight. A slight chance of snow late. Lows in the lower 20s. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening. Chance of precipitation 30 percent.

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Thornton Temperature Statistics

December Temperature

Lansing Municipal Airport (4.3 miles)

  • Lowest 1 December, 2025

    13.8 °F

  • Average December

    22.3 °F

  • Highest 3 December, 2025

    28.9 °F

Climate (2020–Present)

Lansing Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    60.4 °F
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