Thornton Weather Forecast

    • 31
    • 57

    Becoming Sunny

    • 36
    • 65

    Partly Sunny

    • 39
    • 67

    Mostly Cloudy

    • 33
    • 58

    Chance Rain

    • 27
    • 55

    Chance Snow

    • 23
    • 47

    Slight Chance Snow

Today 14 Feb North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Mostly sunny. Highs in the mid 50s.

Tonight 14 Feb North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Mostly clear. Lows near 30.

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Thornton Temperature Statistics

February Temperature

Broomfield / Jeffco (6.8 miles)

  • Lowest 11 February, 2026

    28.4 °F

  • Average February

    46 °F

  • Highest 9 February, 2026

    69.8 °F

Climate (2021–Present)

Broomfield / Jeffco (6.8 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    65.3 °F
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