Sun Valley Weather Forecast

    • 61
    • 89

    Chance Thunderstorms

    • 60
    • 87

    Chance Thunderstorms

    • 62
    • 90

    Chance Thunderstorms

    • 63
    • 96

    Slight Chance Thunderstorms

    • 62
    • 95

    Slight Chance Thunderstorms

    • 61
    • 92

    Chance Thunderstorms

Today 25 Aug North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Partly cloudy in the Morning, then mostly cloudy with a chance of Thunderstorms in the afternoon. Highs 83 to 89. Chance of precipitation 40 percent.

Tonight 25 Aug North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County

Partly cloudy. Lows 58 to 64.

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Sun Valley Temperature Statistics

August Temperature

Broomfield / Jeffco (11.8 miles)

  • Lowest 4 August, 2026

    51.8 °F

  • Average August

    73.1 °F

  • Highest 2 August, 2026

    102.2 °F

Climate (2021–2026)

Broomfield / Jeffco (11.8 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    66 °F
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