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The weather in Janesville in December is very cold with temperatures between -6°C and 1°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Janesville. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Janesville during December. It’s important to get out your snow boots and warm mittens to stay warm while you explore Janesville.
Our weather forecast can give you a great sense of what weather to expect in Janesville in December 2024.
If you’re planning to visit Janesville in the near future, we highly recommend that you review the 14 day weather forecast for Janesville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -11° | 8 | 18 | 5 | 48 mm | Awful | Janesville in January |
| February | -1° / -10° | 7 | 16 | 5 | 46 mm | Awful | Janesville in February |
| March | 7° / -2° | 7 | 20 | 4 | 72 mm | Awful | Janesville in March |
| April | 13° / 3° | 8 | 21 | 1 | 114 mm | Bad | Janesville in April |
| May | 20° / 10° | 9 | 22 | 0 | 115 mm | Ok | Janesville in May |
| June | 25° / 15° | 9 | 21 | 0 | 138 mm | Good | Janesville in June |
| July | 27° / 18° | 7 | 24 | 0 | 96 mm | Good | Janesville in July |
| August | 26° / 17° | 8 | 24 | 0 | 92 mm | Good | Janesville in August |
| September | 23° / 13° | 6 | 24 | 0 | 90 mm | Perfect | Janesville in September |
| October | 15° / 6° | 8 | 23 | 0 | 91 mm | Ok | Janesville in October |
| November | 7° / 0° | 6 | 23 | 1 | 58 mm | Ok | Janesville in November |
| December | 1° / -6° | 8 | 20 | 3 | 61 mm | Awful | Janesville in December |