South Beloit Weather Forecast
- 8
- 48
Rain Showers
- 18
- 25
Mostly Cloudy
- 10
- 38
Partly Sunny
- 14
- 23
Partly Sunny
- 30
- 36
Mostly Cloudy
- 26
- 41
Mostly Cloudy
Today 18 Dec Winnebago
Areas of fog early in the morning. Areas of drizzle in the morning. Rain Showers. A slight chance of snow Showers in the afternoon. Breezy. Highs in the upper 40s. Temperature falling into the mid 30s in the afternoon. South Winds 15 to 20 Mph, becoming west in the afternoon. Gusts up to 30 Mph. Chance of precipitation near 100 percent.
Tonight 18 Dec Winnebago
Mostly cloudy. A chance of snow Showers. Little or no snow accumulation. Windy with Lows around 9 above. West Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of precipitation 50 percent. Wind chill Values as low as 10 below.
South Beloit Temperature Statistics
December Temperature
Janesville-Rock County (8.7 miles)
Lowest 14 December, 2025
-7.6 °FAverage December
17.3 °FHighest 10 December, 2025
37.4 °F
Climate (2020–Present)
Janesville-Rock County (8.7 miles)
Average Low 2020–2025
40.4 °FAverage 2020–2025
48.7 °FAverage High 2020–2025
60.2 °F