United States
Weather in Janesville through the year
The average of the weather stations Rock Is L&D (182 km), Green Bay (215 km) and Cedar Rapids (223 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -1.3 °C | -1.8 °C – -0.4 °C |
| February | 1.2 °C | -0.6 °C – 3.9 °C |
| March | 8.1 °C | 4.4 °C – 11.4 °C |
| April | 15.3 °C | 11.7 °C – 18.5 °C |
| May | 22.0 °C | 18.7 °C – 25.3 °C |
| June | 27.3 °C | 25.4 °C – 28.7 °C |
| July | 29.0 °C | 28.8 °C – 29.2 °C |
| August | 27.9 °C | 27.1 °C – 28.7 °C |
| September | 24.6 °C | 21.6 °C – 26.9 °C |
| October | 17.2 °C | 12.8 °C – 21.5 °C |
| November | 8.4 °C | 4.3 °C – 12.6 °C |
| December | 1.5 °C | -0.4 °C – 4.0 °C |