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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

25°F

-4°C

Humidity 100%
Wind Speed NW 18 G 25 mph
Barometer 29.91 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 9 Jan 9:45 am CST
Extended Forecast for

Rockton IL

  • Today

    Today: Mostly sunny, with a high near 42. Breezy, with a northwest wind 15 to 20 mph decreasing to 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 42 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Tonight

    Tonight: A 30 percent chance of snow, mainly after 3am. Increasing clouds, with a low around 30. North northwest wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Partly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow likely before noon, then a chance of snow showers after noon. Cloudy, with a high near 34. Breezy, with a west northwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 34 °F

    Snow Likely
    and Breezy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 20 °F

    Chance Snow
    Showers and
    Blustery

  • Sunday

    Sunday: Mostly sunny, with a high near 30. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 30 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers after noon. Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 42. Breezy, with a northwest wind 15 to 20 mph decreasing to 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.
Tonight
A 30 percent chance of snow, mainly after 3am. Increasing clouds, with a low around 30. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Snow likely before noon, then a chance of snow showers after noon. Cloudy, with a high near 34. Breezy, with a west northwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday Night
A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Mostly sunny, with a high near 30. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 23.
Monday
Mostly sunny, with a high near 39.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
A chance of showers after noon. Mostly cloudy, with a high near 43.
Tuesday Night
A chance of rain showers before midnight, then a chance of rain and snow showers. Mostly cloudy, with a low around 30.
Wednesday
Partly sunny, with a high near 32.
Wednesday Night
Partly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockton IL
 42.45°N 89.05°W
Last Update:
9:46 am CST Jan 9, 2026
Forecast Valid:
10am CST Jan 9, 2026-6pm CST Jan 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation