| National Weather Service Forecast for:
Janesville WI Issued by: National Weather Service Milwaukee, WI |
||||||||||||||||||
| Updated: 12:22 am CST Dec 23, 2025 | ||||||||||||||||||
|
| Overnight |
Mostly cloudy, with a low around 34. Southwest wind around 5 mph. |
| Tuesday |
Partly sunny, with a high near 43. Northwest wind 5 to 10 mph. |
| Tuesday Night |
Partly cloudy, with a low around 25. Northwest wind around 5 mph becoming east after midnight. |
| Wednesday |
A 20 percent chance of rain after 3pm. Mostly cloudy, with a high near 41. Southeast wind 5 to 10 mph. |
| Wednesday Night |
A 40 percent chance of rain before midnight. Cloudy, with a low around 34. Southeast wind around 5 mph becoming calm. |
| Christmas Day |
Cloudy, with a high near 42. East wind 5 to 10 mph. |
| Thursday Night |
Rain likely, mainly after midnight. Cloudy, with a low around 38. East wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible. |
| Friday |
A 20 percent chance of rain before noon. Mostly cloudy, with a high near 46. East wind around 5 mph becoming northwest in the morning. |
| Friday Night |
Mostly cloudy, with a low around 34. |
| Saturday |
Mostly cloudy, with a high near 45. |
| Saturday Night |
Mostly cloudy, with a low around 20. Blustery. |
| Sunday |
Mostly sunny, with a high near 27. Blustery. |
| Sunday Night |
Partly cloudy, with a low around 10. |
| Monday |
Mostly sunny, with a high near 24. |
Forecast from NOAA-NWS for Janesville WI.
