Chautauqua Weather Forecast

    • 60
    • 91

    Decreasing Clouds

    • 61
    • 83

    Slight Chance Thunderstorms

    • 65
    • 91

    Chance Rain Showers

    • 58
    • 86

    Rain Showers Likely

    • 57
    • 73

    Rain Showers

    • 59
    • 84

    Chance Thunderstorms

Today 11 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy in the Morning, then becoming mostly cloudy. Highs 86 to 92.

Tonight 11 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Slight chance of Showers in the evening. Lows 53 to 59. Chance of rain 10 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chautauqua Temperature Statistics

September Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 9 September, 2026

    55.4 °F

  • Average September

    74.8 °F

  • Highest 4 September, 2026

    95 °F

Climate (2021–2026)

Boulder Municipal Airport (3.7 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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