Louisville Weather Forecast

    • 58
    • 83

    Slight Chance Thunderstorms

    • 56
    • 86

    Partly Sunny

    • 55
    • 85

    Partly Sunny

    • 56
    • 84

    Slight Chance Thunderstorms

    • 56
    • 85

    Slight Chance Thunderstorms

    • 53
    • 80

    Chance Thunderstorms

Today 7 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Slight chance of Thunderstorms in the afternoon. Highs in the lower to mid 80s. Chance of precipitation 20 percent.

Tonight 7 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a slight chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid to upper 50s. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Louisville Temperature Statistics

September Temperature

Erie Municipal Airport (4.3 miles)

  • Lowest 1 September, 2025

    48 °F

  • Average September

    67.2 °F

  • Highest 4 September, 2025

    88.2 °F

Climate (2020–Present)

Erie Municipal Airport (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    65.5 °F
Get WillyWeather+ to remove ads