Flagstaff Weather Forecast

    • 69
    • 95

    Chance Thunderstorms

    • 67
    • 95

    Slight Chance Thunderstorms

    • 66
    • 95

    Slight Chance Thunderstorms

    • 59
    • 88

    Rain Showers Likely

    • 56
    • 78

    Rain Showers

    • 54
    • 76

    Rain Showers

Today 9 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy in the Morning, then mostly cloudy with a slight chance of Thunderstorms in the afternoon. Areas of smoke through the day. Highs in the 90s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph in the afternoon. Chance of precipitation 20 percent.

Tonight 9 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy in the Evening, then becoming partly cloudy. Areas of smoke. Lows 61 to 67.

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Flagstaff Temperature Statistics

August Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    76.5 °F

  • Highest 2 August, 2026

    104 °F

Climate (2021–2026)

Boulder Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.3 °F
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