Roscoe Weather Forecast
- 65
- 81
Rain Showers Likely
- 46
- 76
Chance Thunderstorms
- 40
- 63
Partly Sunny
- 45
- 63
Mostly Cloudy
- 49
- 68
Slight Chance Rain Showers
- 52
- 76
Partly Sunny
Today 18 May Winnebago
Mostly cloudy. Showers likely and a chance of Thunderstorms in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Breezy. Highs in the lower 80s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 70 percent.
Tonight 18 May Winnebago
Mostly cloudy. A slight chance of Showers and Thunderstorms early in the evening. Showers likely with a chance of Thunderstorms after midnight. Breezy with Lows in the mid 60s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 70 percent.
Roscoe Temperature Statistics
May Temperature
Janesville-Rock County (14.3 miles)
Lowest 2 May, 2026
30.2 °FAverage May
49.9 °FHighest 4 May, 2026
80.6 °F
Climate (2021–Present)
Janesville-Rock County (14.3 miles)
Average Low 2021–2026
40.4 °FAverage 2021–2026
48.8 °FAverage High 2021–2026
60.4 °F