Weather in Janesville, WI
Updated 2026-08-11 10:15 local time · ZIP codes 53545, 53546, 53548
Patchy light drizzle
No government weather alerts were returned for this location at the latest update.
Next hours
74°62% rain
80°66% rain83°21% rain
83°8% rain82°8% rain
82°9% rain87°5% rain85°6% rain83°7% rain79°9% rain76°10% rain
74°12% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance reaches about 66% over the next 12 hours.
It feels like 77°F with winds near 9 mph.
76°F, 10% rain chance and 2 mph wind.
Visibility is around 6 mi; gusts may reach 14 mph.
Current temperature is 74°F, wind 9 mph, rain chance up to 66%.
UV index is 1.
Janesville weather today
Patchy light drizzle and 74°F in Janesville, WI. Today's high is 87°F with a 58% rain chance. Winds are around 9 mph with gusts near 14 mph. Relative humidity is 93%, pressure is 29.89 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Janesville
Sunrise is at 05:58 AM and sunset is at 08:04 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 83°F and a low near 67°F. The maximum rain chance is 72%.