Thornton Weather Forecast

    • 67
    • 96

    Mostly Sunny

    • 67
    • 94

    Mostly Sunny

    • 66
    • 94

    Mostly Sunny

    • 67
    • 94

    Mostly Sunny

    • 67
    • 95

    Mostly Sunny

    • 67
    • 95

    Chance Thunderstorms

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

Mostly sunny. Highs 91 to 97. Southeast Winds 10 to 20 Mph with Gusts up to 35 Mph in the afternoon.

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

Mostly clear. Lows 59 to 67. Southeast Winds 10 to 20 Mph with Gusts up to 35 Mph.

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Thornton Temperature Statistics

July Temperature

Broomfield / Jeffco (6.8 miles)

  • Lowest 1 July, 2026

    55.4 °F

  • Average July

    72.5 °F

  • Highest 12 July, 2026

    95 °F

Climate (2021–2026)

Broomfield / Jeffco (6.8 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    65.9 °F
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