Gunbarrel Weather Forecast

    • 32
    • 42

    Rain Showers

    • 37
    • 48

    Rain Showers Likely

    • 38
    • 57

    Rain Showers Likely

    • 41
    • 66

    Chance Thunderstorms

    • 42
    • 70

    Slight Chance Thunderstorms

    • 46
    • 76

    Partly Sunny

    • 50
    • 82

    Partly Sunny

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

Rain Showers. Chance of Thunderstorms early in the Afternoon, then a slight chance of Thunderstorms and snow Showers late in the afternoon. No snow accumulation. Highs in the lower to mid 40s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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

Rain Showers likely and chance of snow Showers. Patchy fog after midnight. No snow accumulation. Lows in the lower to mid 30s. North Winds 10 to 15 Mph with Gusts up to 20 Mph in the Evening, becoming light. Chance of precipitation 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gunbarrel Temperature Statistics

May Temperature

Boulder Municipal Airport (3.1 miles)

  • Lowest 1 May, 2026

    32 °F

  • Average May

    59.8 °F

  • Highest 11 May, 2026

    87.8 °F

Climate (2021–Present)

Boulder Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    66.2 °F
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