Horsetooth Mountain Park Weather Forecast

    • 57
    • 83

    Decreasing Clouds

    • 54
    • 80

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 57
    • 88

    Partly Sunny

    • 56
    • 83

    Partly Sunny

    • 54
    • 81

    Chance Thunderstorms

Today 8 Sep Larimer and Boulder Counties Between 6000 and 9000 Feet

Partly cloudy. Highs 72 to 82.

Tonight 8 Sep Larimer and Boulder Counties Between 6000 and 9000 Feet

Mostly cloudy. Lows 49 to 59.

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  • Temperature Real-Time

Horsetooth Mountain Park Temperature Statistics

September Temperature

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

  • Lowest 2 September, 2026

    55 °F

  • Average September

    75.5 °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

    38.6 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    66.3 °F
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