Fort Collins Weather Forecast

    • 59
    • 76

    Rain Showers Likely

    • 56
    • 82

    Rain Showers Likely

    • 50
    • 78

    Rain Showers Likely

    • 47
    • 73

    Chance Thunderstorms

    • 49
    • 75

    Chance Rain Showers

    • 50
    • 78

    Chance Rain Showers

Today 17 Sep Larimer County Below 6000 Feet/Northwest Weld County

Chance of Showers and slight chance of Thunderstorms in the Morning, then Showers likely and chance of Thunderstorms in the afternoon. Highs 75 to 81. Chance of rain 60 percent.

Tonight 17 Sep Larimer County Below 6000 Feet/Northwest Weld County

Mostly cloudy. Chance of Showers and slight chance of Thunderstorms in the evening. Lows 54 to 60. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fort Collins Temperature Statistics

September Temperature

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

  • Lowest 10 September, 2026

    53.1 °F

  • Average September

    72.8 °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

    66.2 °F
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