Chautauqua Weather Forecast

    • 55
    • 68

    Chance Rain Showers

    • 51
    • 61

    Rain Showers Likely

    • 47
    • 69

    Chance Rain Showers

    • 52
    • 73

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

Today 29 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Highs near 80.

Tonight 29 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Slight chance of Showers during the late evening hours. Chance of Showers after midnight. Lows 50 to 56. Chance of rain 40 percent.

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Chautauqua Temperature Statistics

September Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 22 September, 2026

    50 °F

  • Average September

    70.3 °F

  • Highest 13 September, 2026

    96.8 °F

Climate (2021–2026)

Boulder Municipal Airport (3.7 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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