Central Boulder Weather Forecast

    • 66
    • 92

    Slight Chance Thunderstorms

    • 66
    • 93

    Chance Rain Showers

    • 62
    • 90

    Chance Thunderstorms

    • 62
    • 86

    Slight Chance Thunderstorms

    • 61
    • 86

    Chance Thunderstorms

    • 62
    • 89

    Chance Rain Showers

    • 61
    • 89

    Slight Chance Thunderstorms

Today 5 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy until late Afternoon, then mostly cloudy with a slight chance of Thunderstorms late in the afternoon. Highs 89 to 95. Chance of precipitation 20 percent.

Tonight 5 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Chance of Showers and slight chance of Thunderstorms early in the Evening, then a slight chance of Showers during the late evening hours. Lows 60 to 66. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Central Boulder Temperature Statistics

September Temperature

Boulder Municipal Airport (2.5 miles)

  • Lowest 3 September, 2026

    59 °F

  • Average September

    75.1 °F

  • Highest 3 September, 2026

    91.4 °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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