Golden Gate Canyon State Park Weather Forecast

    • 50
    • 65

    Chance Thunderstorms

    • 50
    • 66

    Rain Showers Likely

    • 50
    • 69

    Partly Sunny

    • 49
    • 68

    Chance Thunderstorms

    • 49
    • 67

    Chance Thunderstorms

    • 47
    • 67

    Chance Thunderstorms

Today 6 Sep South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly sunny in the Morning, then mostly cloudy with a chance of rain Showers and slight chance of Thunderstorms early in the afternoon. Mostly cloudy with a chance of Thunderstorms late in the afternoon. Areas of smoke through the day. Highs 56 to 66. Northwest Winds 10 to 15 Mph in the afternoon. Chance of rain 50 percent.

Tonight 6 Sep South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly cloudy. Areas of smoke in the evening. Chance of Thunderstorms in the Evening, then a slight chance of rain Showers after midnight. Lows 36 to 46. Chance of rain 50 percent.

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Golden Gate Canyon State Park Temperature Statistics

September Temperature

Boulder Municipal Airport (16.2 miles)

  • Lowest 4 September, 2025

    50 °F
  • Average September

    71.5 °F
  • Highest 3 September, 2025

    87.8 °F

Climate (2020–Present)

Boulder Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    40.4 °F
  • Average 2020–2025

    52.5 °F
  • Average High 2020–2025

    64.9 °F
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