Janesville, WI Weather Forecast
Rock County, Wisconsin
Live radar, warnings and storm tracking for Janesville, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Janesville
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Janesville, WI at a glance
Janesville is home to about 66,102 people in Rock County, across 34 square miles. It ranks 10th by population of 322 places in Wisconsin with a forecast here. The nearest neighbour with its own forecast is Harmony, 4 miles away.
- County
- Rock County
- Population
- 66,102 2023 est.
- Land area
- 34 sq mi
- People per sq mi
- 1,920
- Forecast point
- 42.6847°N, 89.0132°W
How well can the network see Janesville?
The nearest Doppler radar is KMKX (Milwaukee, WI), to the NE. Its lowest scan passes about 1,900 ft above Janesville. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Janesville show up clearly. Janesville is closer to its radar than 70% of US cities.
The closest weather station is KJVL (Janesville/S Wisconsin Rgnl). Close enough that its readings are the conditions in town.
Forecasts near Janesville
- Harmony, WI4 mi
- Rock, WI5 mi
- Milton, WI7 mi
- Fulton, WI8 mi
- Edgerton, WI11 mi
- Beloit, WI11 mi
- South Beloit, IL14 mi
- Evansville, WI16 mi
Elsewhere in Wisconsin
MilwaukeeMadisonGreen BayKenoshaRacineAppletonAll Wisconsin forecasts →