Chautauqua Weather Forecast

    • 66
    • 92

    Slight Chance Thunderstorms

    • 66
    • 91

    Slight Chance Thunderstorms

    • 63
    • 89

    Chance Thunderstorms

    • 62
    • 86

    Chance Rain Showers

    • 62
    • 85

    Chance Thunderstorms

    • 62
    • 89

    Chance Thunderstorms

Today 5 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy in the Morning, then mostly cloudy with a slight chance of Thunderstorms in the afternoon. Highs near 90. Chance of precipitation 20 percent.

Tonight 5 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear. Lows 59 to 65.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chautauqua Temperature Statistics

September Temperature

Boulder Municipal Airport (3.7 miles)

  • Lowest 1 September, 2026

    60.8 °F

  • Average September

    74.3 °F

  • Highest 2 September, 2026

    89.6 °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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