Silverthorne Weather Forecast

    • 38
    • 76

    Mostly Sunny

    • 39
    • 71

    Mostly Sunny

    • 40
    • 74

    Partly Sunny

    • 43
    • 73

    Chance Thunderstorms

    • 42
    • 77

    Chance Thunderstorms

    • 39
    • 73

    Slight Chance Thunderstorms

    • 40
    • 73

    Slight Chance Thunderstorms

Today 9 Sep Grand and Summit Counties Below 9000 Feet

Partly cloudy. Highs 71 to 77. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Sep Grand and Summit Counties Below 9000 Feet

Mostly clear. Lows 34 to 40.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Silverthorne Temperature Statistics

September Temperature

Copper Mountain - Red Cliff Pass (11.2 miles)

  • Lowest 1 September, 2026

    39.2 °F

  • Average September

    49.2 °F

  • Highest 6 September, 2026

    68 °F

Climate (2021–2026)

Copper Mountain - Red Cliff Pass (11.2 miles)

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  • Average Low 2021–2026

    29.4 °F

  • Average 2021–2026

    35.8 °F

  • Average High 2021–2026

    42.1 °F
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