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Janesville, WI 53545 Weather

Tonight: Showers And Thunderstorms, low 58°F. Hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Janesville, WI 53545 current weather

65°F

Isolated Rain Showers

Forecast for this hour. No recent report from a nearby station.

H -- / L 58°

No recent station report. NWS hourly forecast updated 10/28/2026, 7:46 PM PT

Hourly forecast

NWS, updated 10/28/2026, 7:46 PM PT

  1. Now65°23%
  2. 11 PM64°57%
  3. 12 AM62°91%Thu
  4. 1 AM62°87%
  5. 2 AM61°88%
  6. 3 AM60°56%
  7. 4 AM59°53%
  8. 5 AM59°27%
  9. 6 AM58°15%
  10. 7 AM58°
  11. 8 AM58°
  12. 9 AM59°
  13. 10 AM61°
  14. 11 AM62°
  15. 12 PM62°
  16. 1 PM64°
  17. 2 PM64°
  18. 3 PM64°
  19. 4 PM63°
  20. 5 PM61°
  21. 6 PM56°
  22. 7 PM53°
  23. 8 PM51°
  24. 9 PM49°
  25. 10 PM48°
  26. 11 PM47°
  27. 12 AM46°Fri
  28. 1 AM45°
  29. 2 AM43°
  30. 3 AM42°
  31. 4 AM41°
  32. 5 AM40°
  33. 6 AM39°
  34. 7 AM38°
  35. 8 AM39°
  36. 9 AM43°
  37. 10 AM50°
  38. 11 AM54°
  39. 12 PM57°
  40. 1 PM58°11%
  41. 2 PM60°11%
  42. 3 PM60°11%
  43. 4 PM60°11%
  44. 5 PM59°11%
  45. 6 PM57°11%
  46. 7 PM55°25%
  47. 8 PM54°25%
  48. 9 PM52°25%

10-day forecast

Tap a day for details

  • Today10/2891% chance of precipitationLow 58°High

    Tonight: Isolated rain showers before 11pm, then showers and thunderstorms. Mostly cloudy, with a low around 58. Southwest wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.

    Showers And Thunderstorms
  • Thu10/2915% chance of precipitationLow 38°High 65°

    Thursday: Isolated rain showers before 7am. Mostly sunny, with a high near 65. Northwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

    Thursday Night: Clear, with a low around 38. North wind 0 to 5 mph.

    Isolated Rain Showers then Mostly Sunny
  • Fri10/3040% chance of precipitationLow 46°High 60°

    Friday: Partly sunny, with a high near 60. East wind 0 to 5 mph.

    Friday Night: A chance of rain showers after 7pm. Cloudy, with a low around 46. East wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

    Partly Sunny
  • Sat10/3160% chance of precipitationLow 47°High 62°

    Saturday: Rain showers likely. Mostly cloudy, with a high near 62. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

    Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 47. East wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

    Rain Showers Likely
  • Sun11/119% chance of precipitationLow 50°High 65°

    Sunday: A slight chance of rain showers. Mostly cloudy, with a high near 65. East wind 0 to 5 mph. Chance of precipitation is 20%.

    Sunday Night: Mostly cloudy, with a low around 50.

    Slight Chance Rain Showers
  • Mon11/251% chance of precipitationLow 53°High 66°

    Monday: A chance of rain showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.

    Monday Night: A chance of rain showers. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.

    Chance Rain Showers
  • Tue11/359% chance of precipitationLow 51°High 66°

    Tuesday: Rain showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    Tuesday Night: A chance of rain showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

    Rain Showers Likely
  • Wed11/454% chance of precipitationLow High 62°

    Wednesday: A chance of rain showers. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.

    Chance Rain Showers
  • Thu11/5Model blend31% chance of precipitationLow 40°High 60°

    Thursday: Chance of rain. High near 60°. Low that night near 40°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blend22% chance of precipitationLow 38°High 58°

    Friday: Mostly cloudy, slight chance of rain. High near 58°. Low that night near 38°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 42.724, -89.022 from the NWS MKX office, updated 10/28/2026, 7:46 PM PT · Official forecast on weather.gov

Days 9 to 10: NOAA National Blend of Models, station KJVL (Janesville/S Wisconsin Rgnl, 7 mi), model run 10/28/2026, 9:00 PM CDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now65°Isolated Rain Showers23%10 mph
  2. 11 PM64°Chance Showers And Thunderstorms57%10 mph
  3. 12 AM62°Showers And Thunderstorms91%15 mph
  4. 1 AM62°Showers And Thunderstorms87%15 mph
  5. 2 AM61°Showers And Thunderstorms88%15 mph
  6. 3 AM60°Chance Showers And Thunderstorms56%10 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

Will it rain in Janesville, WI 53545 in the next 24 hours?
The hourly forecast shows a 57% chance of precipitation around 10/28/2026, 11:00 PM CDT.
What is the 10-day forecast for Janesville, WI 53545?
The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 5 to Nov 6) come from the NOAA National Blend of Models, with highs of 58°F to 60°F and up to a 31% chance of precipitation. Model guidance this far out often changes.
What time is sunrise and sunset in Janesville, WI 53545 today?
Sunrise is about 7:25 AM CDT and sunset is about 5:54 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Janesville, WI 53545?
At Afton - Janesville Wwtp, the 1991 to 2020 normal high in October is 62°F and the normal low is 40°F.

Nearby hazards

Wisconsin hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:General thunderstormsOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: WIBU 2 Fire (0 acres), WIBU 3 Fire (0 acres), WIBU 1 Fire (0 acres), WIBU 4 Fire (0 acres), WIBU 6 Fire (0 acres)

Drought

By county

Rock County, week of 10/20/2026

No drought or abnormal dryness in this county.

Sun and moon

Local time, center of the area

Sunrise
7:25 AM
Sunset
5:54 PM
Daylight
10 hr 29 min
Moon
Waning Gibbous 90% lit
First light (civil dawn)
6:56 AM
Last light (civil dusk)
6:23 PM
Moonrise
7:13 PM
Moonset
10:36 AM

Normal October weather

Climate

Normal October high 62°, low 40°, precipitation 2.99 in for the month. 1991 to 2020 normals at Afton - Janesville Wwtp, 6 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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