South Boulder Weather Forecast

    • 67
    • 92

    Mostly Sunny

    • 66
    • 95

    Partly Sunny

    • 61
    • 85

    Thunderstorms Likely

    • 60
    • 75

    Thunderstorms Likely

    • 61
    • 78

    Thunderstorms Likely

    • 57
    • 72

    Rain Showers

    • 57
    • 71

    Rain Showers

Today 20 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Highs in the lower to mid 90s.

Tonight 20 Aug Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear. Lows in the lower to mid 60s.

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  • Temperature Forecast NOAA

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South Boulder Temperature Statistics

August Temperature

Boulder Municipal Airport (4.3 miles)

  • Lowest 2 August, 2025

    51.8 °F

  • Average August

    75.9 °F

  • Highest 13 August, 2025

    102.2 °F

Climate (2020–Present)

Boulder Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    64.9 °F
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