Keystone Resort Weather Forecast

    • 40
    • 70

    Rain Showers Likely

    • 43
    • 71

    Rain Showers Likely

    • 44
    • 73

    Chance Thunderstorms

    • 43
    • 70

    Rain Showers

    • 39
    • 69

    Chance Thunderstorms

    • 37
    • 68

    Chance Thunderstorms

Today 14 Sep South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Mostly cloudy with a chance of rain Showers. Slight chance of Thunderstorms in the afternoon. Highs 57 to 67. West Winds 10 to 20 Mph with Gusts up to 35 Mph. Chance of rain 40 percent.

Tonight 14 Sep South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and Wes

Slight chance of Thunderstorms in the evening. Mostly cloudy with a chance of rain Showers. Lows 36 to 46. West Winds 10 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Keystone Resort Temperature Statistics

September Temperature

Copper Mountain - Red Cliff Pass (14.3 miles)

  • Lowest 10 September, 2026

    37.4 °F

  • Average September

    48.9 °F

  • Highest 6 September, 2026

    68 °F

Climate (2021–2026)

Copper Mountain - Red Cliff Pass (14.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    29.4 °F

  • Average 2021–2026

    35.7 °F

  • Average High 2021–2026

    42.1 °F
Get WillyWeather+ to remove ads