Boulder Weather Forecast

    • 51
    • 78

    Slight Chance Thunderstorms

    • 55
    • 80

    Partly Sunny

    • 53
    • 82

    Chance Rain Showers

    • 48
    • 75

    Rain Showers Likely

    • 45
    • 66

    Chance Rain Showers

    • 46
    • 70

    Slight Chance Thunderstorms

Today 27 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. A 20 percent chance of Thunderstorms in the afternoon. Highs in the upper 70s.

Tonight 27 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. A 10 percent chance of Thunderstorms in the evening. Lows near 50.

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  • Temperature Forecast NOAA

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Boulder Temperature Statistics

September Temperature

Boulder Municipal Airport (2.5 miles)

  • Lowest 11 September, 2022

    41 °F
  • Average September

    68.1 °F
  • Highest 8 September, 2022

    98.6 °F

Climate (2010–Present)

Boulder Municipal Airport (2.5 miles)

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  • Average Low 2010–Present

    41 °F
  • Average 2010–Present

    53.2 °F
  • Average High 2010–Present

    65.4 °F
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