Janesville, WI 53546 Monthly Weather

Rock County5:44 PM CDT42.67°N, 89.00°W
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October 2026

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166°/59°0.85 inAvg 65°/44°
265°/51°1.20 inAvg 65°/44°
367°/44°Avg 64°/44°
471°/43°<0.01 inAvg 64°/43°
571°/44°Avg 64°/43°
671°/43°Avg 63°/42°
775°/48°Avg 63°/42°
878°/47°Avg 62°/42°
971°/47°Avg 62°/41°
1067°/52°0.12 inAvg 61°/41°
1182°/53°Avg 61°/40°
1280°/51°Avg 60°/40°
1388°/63°Avg 60°/40°
1478°/60°0.10 inAvg 59°/39°
1565°/54°<0.01 inAvg 59°/39°
1660°/50°0.10 inAvg 58°/39°
1755°/34°0.48 inAvg 58°/38°
1858°/33°Avg 57°/38°
1965°/40°Avg 57°/38°
2068°/40°Avg 56°/37°
21 Sunny 74°/46°Avg 56°/37°
22 Areas Of Fog then Sunny 74°/49°Avg 56°/36°
23 Patchy Fog then Mostly Sunny 73°/50°Avg 55°/36°
24 Partly Sunny 71°/51°Avg 54°/36°
25 Partly Sunny 72°/50°Avg 54°/36°
26 Partly Sunny 64°/45°Avg 54°/35°
27 Chance Rain Showers 60°/43°Avg 53°/35°
28 Cloudy 62°/49°Avg 53°/34°
29 Light rain 59°/37°Avg 52°/34°
30 Sunny 54°/35°Avg 52°/34°
31Avg 51°/33°
Average high70° (normal 61°)
Average low48° (normal 41°)
Warmest / coldest88° / 33°
Precipitation2.85 in (normal 1.81 in to date)
Record high today85° (1953)
Record low today21° (1895)

Observed: Beloit, 18 km away, records since 1893. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.