Flagstaff Weather Forecast

    • 46
    • 74

    Mostly Cloudy

    • 47
    • 66

    Decreasing Clouds

    • 54
    • 73

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 57
    • 73

    Slight Chance Rain Showers

    • 47
    • 71

    Chance Rain Showers

    • 42
    • 61

    Chance Rain Showers

Today 18 Oct Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Highs 61 to 67.

Tonight 18 Oct Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy in the Evening, then becoming partly cloudy. Lows 37 to 43.

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Flagstaff Temperature Statistics

October Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 16 October, 2026

    35.6 °F

  • Average October

    63.5 °F

  • Highest 5 October, 2026

    91.4 °F

Climate (2021–2026)

Boulder Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    66.5 °F
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