Thornton Weather Forecast

    • 29
    • 58

    Mostly Sunny

    • 36
    • 62

    Partly Sunny

    • 30
    • 60

    Mostly Cloudy

    • 29
    • 53

    Chance Rain/Snow

    • 31
    • 52

    Mostly Sunny

    • 31
    • 62

    Mostly Sunny

Today 31 Jan North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Partly cloudy. Highs in the upper 50s. Northwest Winds 10 to 15 Mph with Gusts up to 20 Mph in the afternoon.

Tonight 31 Jan North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Mostly clear. Lows in the mid 20s to lower 30s.

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Thornton Temperature Statistics

January Temperature

Broomfield / Jeffco (6.8 miles)

  • Lowest 24 January, 2026

    3.2 °F

  • Average January

    36.7 °F

  • Highest 4 January, 2026

    69.8 °F

Climate (2021–Present)

Broomfield / Jeffco (6.8 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    65.2 °F
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