South Beloit Weather Forecast

    • 58
    • 80

    Increasing Clouds

    • 59
    • 80

    Rain Showers Likely

    • 56
    • 78

    Mostly Sunny

    • 55
    • 76

    Partly Sunny

    • 58
    • 77

    Partly Sunny

    • 61
    • 80

    Slight Chance Thunderstorms

Today 20 Aug Winnebago

Mostly sunny. Highs around 80. Northeast Winds around 5 Mph, becoming south in the afternoon.

Tonight 20 Aug Winnebago

Mostly clear. Patchy fog. Lows in the upper 50s. Light and variable Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

South Beloit Temperature Statistics

August Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    69.8 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (8.7 miles)

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

  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
Get WillyWeather+ to remove ads