Central Boulder Weather Forecast

    • 51
    • 64

    Chance Rain Showers

    • 48
    • 70

    Partly Sunny

    • 51
    • 78

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 56
    • 83

    Partly Sunny

Today 30 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Showers likely through the day. Slight chance of Thunderstorms in the afternoon. Highs 61 to 69. Northeast Winds 10 to 15 Mph in the afternoon. Chance of rain 70 percent.

Tonight 30 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Slight chance of Showers in the evening. Lows near 50. Chance of rain 10 percent.

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Central Boulder Temperature Statistics

September Temperature

Boulder Municipal Airport (2.5 miles)

  • Lowest 22 September, 2026

    50 °F

  • Average September

    70.1 °F

  • Highest 13 September, 2026

    96.8 °F

Climate (2021–2026)

Boulder Municipal Airport (2.5 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.4 °F
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