Gunbarrel Weather Forecast

    • 50
    • 81

    Mostly Sunny

    • 55
    • 88

    Mostly Sunny

    • 55
    • 91

    Partly Sunny

    • 54
    • 80

    Chance Rain Showers

    • 54
    • 85

    Chance Rain Showers

    • 52
    • 80

    Mostly Sunny

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

Mostly sunny. Highs 78 to 84. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph in the Morning, becoming light.

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

Mostly clear. Lows 48 to 56.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gunbarrel Temperature Statistics

September Temperature

Boulder Municipal Airport (3.1 miles)

  • Lowest 3 September, 2026

    59 °F

  • Average September

    76.2 °F

  • Highest 4 September, 2026

    95 °F

Climate (2021–2026)

Boulder Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.4 °F
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