Beloit Weather Forecast
- 56
- 85
Mostly Sunny
- 58
- 84
Mostly Sunny
- 60
- 85
Partly Sunny
- 60
- 79
Chance Rain Showers
- 59
- 76
Chance Rain Showers
- 58
- 76
Chance Rain Showers
Today 16 Sep Rock
Sunny. Highs in the mid 80s. Southeast Winds up to 5 Mph.
Tonight 16 Sep Rock
Mostly clear. Lows in the mid 50s. Southeast Winds up to 5 Mph.
Beloit Temperature Statistics
September Temperature
Janesville-Rock County (7.5 miles)
Lowest 7 September, 2025
39.2 °FAverage September
57.8 °FHighest 12 September, 2025
82.4 °F
Climate (2020–Present)
Janesville-Rock County (7.5 miles)
Average Low 2020–2025
40.4 °FAverage 2020–2025
48.7 °FAverage High 2020–2025
60.2 °F