Thornton Weather Forecast

    • 68
    • 80

    Decreasing Clouds

    • 58
    • 79

    Partly Sunny

    • 63
    • 80

    Mostly Sunny

    • 67
    • 85

    Chance Rain Showers

    • 67
    • 81

    Chance Rain Showers

    • 71
    • 88

    Chance Rain Showers

    • 64
    • 82

    Chance Rain Showers

Today 9 Sep Southern Cook

Cloudy. Temperatures in the upper 70s. West Winds 5 to 10 Mph.

Tonight 9 Sep Southern Cook

Mostly cloudy. Humid. Lows in the upper 60s. West Winds around 5 Mph.

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  • Temperature Real-Time

Thornton Temperature Statistics

September Temperature

Lansing Municipal Airport (4.3 miles)

  • Lowest 7 September, 2026

    59.5 °F

  • Average September

    78.4 °F

  • Highest 2 September, 2026

    94.6 °F

Climate (2021–2026)

Lansing Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    42.4 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    60.4 °F
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