Weather in Janesville, IA
Updated 2026-09-26 11:00 local time · ZIP codes 50647
Patchy rain nearby
No government weather alerts were returned for this location at the latest update.
Next hours
54°33% rain
54°43% rain52°63% rain52°65% rain52°72% rain55°66% rain
56°20% rain
57°17% rain
57°39% rain
58°24% rain
58°15% rain57°17% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 72% over the next 12 hours.
It feels like 49°F with winds near 9 mph.
57°F, 17% rain chance and 10 mph wind.
Visibility is around 6 mi; gusts may reach 23 mph.
Current temperature is 54°F, wind 9 mph, rain chance up to 72%.
UV index is 1.
Local weather characteristics in Janesville
Iowa has a continental climate with hot summers, cold winters, strong winds and a notable spring and summer severe-thunderstorm season.
Janesville is part of the Midwest weather region. The forecast point is near 42.65°N latitude and 92.46°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Janesville weather today
Patchy rain nearby and 54°F in Janesville, IA. Today's high is 59°F with a 80% rain chance. Winds are around 9 mph with gusts near 20 mph. Relative humidity is 78%, pressure is 30.16 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Janesville
Sunrise is at 07:01 AM and sunset is at 07:00 PM. Tomorrow's forecast calls for Partly Cloudy with a high near 70°F and a low near 57°F. The maximum rain chance is 20%.