Round Lake Weather Forecast

    • 54
    • 68

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 58
    • 80

    Mostly Sunny

    • 62
    • 80

    Slight Chance Thunderstorms

    • 65
    • 84

    Slight Chance Rain Showers

    • 65
    • 86

    Chance Rain Showers

    • 61
    • 82

    Slight Chance Thunderstorms

Today 7 Sep Clark

Sunny. Near steady temperature in the mid 60s. South Winds 5 to 10 Mph.

Tonight 7 Sep Clark

Mostly clear this Evening, then partly cloudy with a slight chance of Showers after midnight. Not as cool with Lows in the mid 50s. Southeast Winds 10 to 15 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Round Lake Temperature Statistics

September Temperature

Watertown, Watertown Municipal Airport (31.7 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    58.6 °F

  • Highest 2 September, 2025

    80.1 °F

Climate (2020–Present)

Watertown, Watertown Municipal Airport (31.7 miles)

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

  • Average Low 2020–2025

    35 °F

  • Average 2020–2025

    45.2 °F

  • Average High 2020–2025

    55.5 °F
Get WillyWeather+ to remove ads