Flagstaff Weather Forecast

    • 25
    • 46

    Chance Rain/Snow

    • 27
    • 43

    Partly Sunny

    • 34
    • 49

    Partly Sunny

    • 39
    • 56

    Breezy

    • 42
    • 58

    Mostly Cloudy

    • 34
    • 56

    Partly Sunny

Today 6 Dec Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a chance of rain and snow until late Afternoon, then partly cloudy with a slight chance of rain and snow late in the afternoon. Highs in the mid 40s. West Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of precipitation 30 percent.

Tonight 6 Dec Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear. Lows 19 to 25. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light.

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Flagstaff Temperature Statistics

December Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 1 December, 2025

    14 °F

  • Average December

    31.1 °F

  • Highest 2 December, 2025

    50 °F

Climate (2020–Present)

Boulder Municipal Airport (3.7 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    65.1 °F
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