National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

A Couple of Fast Moving Storms Affecting Areas Along and East of the Rockies

A couple of storm systems will impact travel conditions through the first half of this weekend. Heavy snow from the mountains of the West will move into the upper Midwest and upper Great Lakes through tonight. Record warmth and Gulf moisture along and east of the Mississippi River will fuel severe thunderstorms, heavy rainfall, fog for the Tennessee Valley and deep South on Friday into Saturday. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

39°F

4°C

Humidity 87%
Wind Speed S 12 mph
Barometer 29.78 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 8 Jan 6:45 am CST
Extended Forecast for

Rockton IL

  • Today

    Today: Rain, mainly after 2pm. High near 52. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 52 °F

    Mostly Cloudy
    then Rain

  • Tonight

    Tonight: Showers and thunderstorms likely before 9pm, then a chance of showers. Cloudy, with a low around 39. Breezy, with a southeast wind 15 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 39 °F

    Showers
    Likely and
    Breezy then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of rain before noon. Partly sunny, with a high near 43. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 43 °F

    Chance Rain
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A chance of rain and snow between midnight and 3am, then a chance of snow after 3am. Increasing clouds, with a low around 30. North wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Snow likely, possibly mixed with rain, becoming all snow after 9am. Mostly cloudy, with a high near 35. Northeast wind 5 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 35 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly after 2pm. High near 52. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely before 9pm, then a chance of showers. Cloudy, with a low around 39. Breezy, with a southeast wind 15 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of rain before noon. Partly sunny, with a high near 43. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A chance of rain and snow between midnight and 3am, then a chance of snow after 3am. Increasing clouds, with a low around 30. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Saturday
Snow likely, possibly mixed with rain, becoming all snow after 9am. Mostly cloudy, with a high near 35. Northeast wind 5 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 19.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 37.
Monday Night
Mostly cloudy, with a low around 29.
Tuesday
Mostly cloudy, with a high near 40.
Tuesday Night
A chance of rain and snow. Cloudy, with a low around 27.
Wednesday
Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockton IL
 42.45°N 89.05°W
Last Update:
5:51 am CST Jan 8, 2026
Forecast Valid:
7am CST Jan 8, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation