Thornton Weather Forecast

    • 57
    • 83

    Slight Chance Thunderstorms

    • 54
    • 74

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 56
    • 75

    Mostly Sunny

    • 58
    • 78

    Partly Sunny

Today 23 Aug Southern Cook

Mostly cloudy in the Morning, then becoming partly cloudy. A slight chance of Showers. A slight chance of Thunderstorms in the afternoon. Highs in the lower 80s. West Winds 5 to 10 Mph, increasing to 10 to 15 Mph with Gusts up to 25 Mph in the afternoon. Chance of precipitation 20 percent.

Tonight 23 Aug Southern Cook

Mostly clear. Lows in the mid 50s. Northwest Winds 5 to 10 Mph.

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Thornton Temperature Statistics

August Temperature

Lansing Municipal Airport (4.3 miles)

  • Lowest 2 August, 2025

    54.1 °F

  • Average August

    74.7 °F

  • Highest 16 August, 2025

    93.6 °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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