Silverthorne Weather Forecast

    • 42
    • 60

    Rain Showers Likely

    • 38
    • 59

    Rain Showers Likely

    • 32
    • 62

    Chance Thunderstorms

    • 33
    • 66

    Mostly Sunny

    • 37
    • 69

    Rain Showers Likely

    • 33
    • 60

    Rain Showers

    • 29
    • 55

    Chance Rain/Snow

Today 23 Sep Grand and Summit Counties Below 9000 Feet

Mostly sunny with a 10 percent chance of rain Showers. Highs 55 to 61.

Tonight 23 Sep Grand and Summit Counties Below 9000 Feet

Mostly cloudy. Slight chance of Thunderstorms in the evening. Chance of Showers through the night. Lows in the lower to mid 40s. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Silverthorne Temperature Statistics

September Temperature

Copper Mountain - Red Cliff Pass (11.2 miles)

  • Lowest 19 September, 2026

    32 °F

  • Average September

    46.5 °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

    35.7 °F

  • Average High 2021–2026

    42 °F
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