East Boulder Weather Forecast

    • 55
    • 82

    Partly Sunny

    • 49
    • 76

    Slight Chance Thunderstorms

    • 48
    • 67

    Chance Rain Showers

Today 15 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Slight chance of Showers early in the afternoon. Slight chance of Thunderstorms late in the afternoon. Highs in the lower to mid 80s. Chance of rain 20 percent.

Tonight 15 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Slight chance of Showers early in the evening. Lows in the lower to mid 50s. Chance of rain 20 percent.

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East Boulder Temperature Statistics

September Temperature

Boulder Municipal Airport (2.5 miles)

  • Lowest 6 September, 2025

    44.6 °F

  • Average September

    69.2 °F

  • Highest 10 September, 2025

    91.4 °F

Climate (2020–Present)

Boulder Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    65 °F
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