Boulder Weather Forecast

    • 66
    • 93

    Chance Thunderstorms

    • 61
    • 91

    Chance Thunderstorms

    • 59
    • 87

    Chance Thunderstorms

    • 59
    • 85

    Rain Showers Likely

    • 61
    • 89

    Chance Thunderstorms

    • 62
    • 93

    Chance Thunderstorms

    • 62
    • 93

    Slight Chance Thunderstorms

Today 23 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Slight chance of Thunderstorms early in the Afternoon, then a chance of Thunderstorms late in the afternoon. Highs in the lower to mid 90s. Chance of precipitation 40 percent.

Tonight 23 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a slight chance of Thunderstorms early in the Evening, then mostly cloudy with a slight chance of Showers during the late evening hours. Partly cloudy after midnight. Lows in the lower to mid 60s. Chance of rain 20 percent.

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Boulder Temperature Statistics

August Temperature

Boulder Municipal Airport (2.5 miles)

  • Lowest 5 August, 2026

    50 °F

  • Average August

    76.6 °F

  • Highest 2 August, 2026

    104 °F

Climate (2021–2026)

Boulder Municipal Airport (2.5 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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