Diversion Lake Weather Forecast

    • 46
    • 63

    Rain Showers Likely

    • 44
    • 69

    Slight Chance Rain Showers

    • 45
    • 75

    Mostly Sunny

    • 46
    • 76

    Mostly Sunny

    • 45
    • 71

    Partly Sunny

    • 46
    • 74

    Partly Sunny

Today 15 Sep Southern Rocky Mountain Front

Mostly cloudy with a 50 percent chance of rain Showers. Highs 50 to 60. West Winds 5 to 15 Mph.

Tonight 15 Sep Southern Rocky Mountain Front

Mostly cloudy. Rain Showers likely and slight chance of Thunderstorms in the Evening, then chance of rain Showers after midnight. Lows 40 to 45. Northwest Winds up to 10 Mph. Chance of precipitation 60 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Diversion Lake Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (62.8 miles)

  • Lowest 5 September, 2025

    39.9 °F

  • Average September

    65.6 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Great Falls, Great Falls International Airport (62.8 miles)

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

  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    58.3 °F
Get WillyWeather+ to remove ads