Sugar River Forest Preserve Weather Forecast
- 36
- 70
Rain Showers
- 36
- 43
Rain Showers
- 41
- 64
Rain Showers
- 44
- 62
Rain Showers Likely
- 34
- 60
Rain Showers Likely
- 30
- 49
Partly Sunny
Today 31 Mar Winnebago
Showers likely and a chance of Thunderstorms. Breezy. Highs in the lower 70s. Temperature falling into the lower 50s in the afternoon. Southwest Winds 15 to 20 Mph, becoming northwest in the afternoon. Gusts up to 30 Mph. Chance of precipitation 70 percent.
Tonight 31 Mar Winnebago
Mostly cloudy. A slight chance of Showers early in the evening. A slight chance of Showers after Midnight, then a chance of Showers late. Lows in the mid 30s. Northeast Winds 10 to 15 Mph. Chance of precipitation 40 percent.
Sugar River Forest Preserve Temperature Statistics
March Temperature
Janesville-Rock County (14.3 miles)
Lowest 1 March, 2026
10.4 °FAverage March
38.7 °FHighest 21 March, 2026
77 °F
Climate (2021–Present)
Janesville-Rock County (14.3 miles)
Average Low 2021–2026
40.4 °FAverage 2021–2026
48.7 °FAverage High 2021–2026
60.4 °F