Horsetooth Mountain Park Weather Forecast

    • 52
    • 76

    Slight Chance Thunderstorms

    • 52
    • 75

    Mostly Cloudy

    • 50
    • 69

    Chance Rain Showers

    • 51
    • 75

    Chance Rain Showers

    • 52
    • 80

    Partly Sunny

    • 53
    • 78

    Slight Chance Thunderstorms

Today 22 Sep Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Slight chance of Thunderstorms in the afternoon. Highs 67 to 75. Chance of precipitation 20 percent.

Tonight 22 Sep Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy with a slight chance of Showers in the Evening, then mostly cloudy after midnight. Lows 42 to 52. Chance of rain 10 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Horsetooth Mountain Park Temperature Statistics

September Temperature

Fort Collins/Loveland - Northern Colorado Regional Airport (9.9 miles)

  • Lowest 16 September, 2026

    51.1 °F

  • Average September

    71.6 °F

  • Highest 5 September, 2026

    97 °F

Climate (2021–2026)

Fort Collins/Loveland - Northern Colorado Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    66.2 °F
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