Four Mile Creek Weather Forecast

    • 48
    • 73

    Slight Chance Thunderstorms

    • 49
    • 72

    Partly Sunny

    • 51
    • 76

    Partly Sunny

    • 50
    • 76

    Slight Chance Thunderstorms

    • 52
    • 78

    Partly Sunny

    • 52
    • 77

    Slight Chance Thunderstorms

Today 20 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Lows 50 to 56. Highs 77 to 83.

Tonight 20 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Chance of Showers in the evening. Slight chance of Thunderstorms until early morning. Lows 43 to 51. Chance of rain 30 percent.

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Four Mile Creek Temperature Statistics

September Temperature

Boulder Municipal Airport (1.2 miles)

  • Lowest 16 September, 2026

    51.8 °F

  • Average September

    72.3 °F

  • Highest 13 September, 2026

    96.8 °F

Climate (2021–2026)

Boulder Municipal Airport (1.2 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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