Athanasiou Valley Airport Weather Forecast

    • 41
    • 59

    Mostly Sunny

    • 47
    • 67

    Partly Sunny

    • 46
    • 66

    Chance Rain Showers

    • 46
    • 65

    Chance Thunderstorms

    • 40
    • 63

    Chance Rain Showers

    • 42
    • 64

    Mostly Sunny

Today 18 Sep Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below

Mostly sunny. Highs 58 to 68.

Tonight 18 Sep Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below

Mostly clear. Lows 39 to 49.

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Athanasiou Valley Airport Temperature Statistics

September Temperature

Boulder Municipal Airport (18 miles)

  • Lowest 6 September, 2025

    44.6 °F

  • Average September

    68.3 °F

  • Highest 10 September, 2025

    91.4 °F

Climate (2020–Present)

Boulder Municipal Airport (18 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    65 °F
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