South Boulder Weather Forecast

    • 52
    • 73

    Becoming Sunny

    • 55
    • 74

    Partly Sunny

    • 58
    • 73

    Chance Rain Showers

    • 49
    • 74

    Slight Chance Rain Showers

    • 43
    • 58

    Chance Rain Showers

    • 45
    • 62

    Mostly Sunny

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

Partly cloudy. Highs in the lower to mid 70s.

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

Mostly clear. Lows in the mid to upper 40s.

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South Boulder Temperature Statistics

October Temperature

Boulder Municipal Airport (4.3 miles)

  • Lowest 16 October, 2026

    35.6 °F

  • Average October

    63 °F

  • Highest 5 October, 2026

    91.4 °F

Climate (2021–2026)

Boulder Municipal Airport (4.3 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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