Thornton Weather Forecast

    • 30
    • 36

    Increasing Clouds

    • 33
    • 36

    Mostly Cloudy

    • 15
    • 47

    Rain

    • 25
    • 26

    Mostly Cloudy

    • 24
    • 42

    Mostly Cloudy

    • 25
    • 34

    Mostly Cloudy

Today 16 Dec Southern Cook

Mostly sunny. Highs in the mid 30s. South Winds 5 to 10 Mph, increasing to southwest 10 to 15 Mph with Gusts up to 25 Mph in the afternoon.

Tonight 16 Dec Southern Cook

Mostly cloudy. Near steady temperature in the mid 30s. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening.

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Thornton Temperature Statistics

December Temperature

Lansing Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    2.1 °F

  • Average December

    23.5 °F

  • Highest 10 December, 2025

    39 °F

Climate (2020–Present)

Lansing Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    60.3 °F
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