Rocky Mountain National Park Weather Forecast

    • 36
    • 54

    Slight Chance Thunderstorms

    • 31
    • 48

    Rain/Snow

    • 28
    • 39

    Snow Showers

    • 29
    • 43

    Chance Thunderstorms

    • 32
    • 48

    Mostly Sunny

    • 35
    • 50

    Partly Sunny

Today 15 Sep South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet

Partly cloudy. Chance of rain Showers and slight chance of Thunderstorms in the afternoon. Highs 57 to 67. Southwest Winds 10 to 15 Mph with Gusts up to 20 Mph. Chance of rain 30 percent.

Tonight 15 Sep South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet

Partly cloudy. Lows 34 to 44.

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Rocky Mountain National Park Temperature Statistics

September Temperature

Vance Brand Airport (29.2 miles)

  • Lowest 6 September, 2025

    43.7 °F

  • Average September

    69.2 °F

  • Highest 10 September, 2025

    93.2 °F

Climate (2020–Present)

Vance Brand Airport (29.2 miles)

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  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    67.9 °F
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