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December 28, 2025: Rare December Severe Weather Outbreak With Multiple Tornadoes in Central Illinois

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

12°F

-11°C

Humidity	73%
Wind Speed	N 9 mph
Barometer	30.04 in
Dewpoint	5°F (-15°C)
Visibility	10.00 mi
Wind Chill	0°F (-18°C)
Last update	1 Jan 12:10 am CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

South Beloit IL

Overnight
Low: 8 °F
Partly Cloudy
New Year's Day
High: 19 °F
Partly Sunny
then Slight
Chance Snow
Thursday Night
Low: 11 °F
Mostly Cloudy
Friday
High: 24 °F
Mostly Sunny
Friday Night
Low: 14 °F
Mostly Cloudy
Saturday
High: 26 °F
Partly Sunny
Saturday Night
Low: 10 °F
Mostly Clear
Sunday
High: 27 °F
Partly Sunny
Sunday Night
Low: 22 °F
Mostly Cloudy

Detailed Forecast

Overnight

Partly cloudy, with a low around 8. Wind chill values as low as 1. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

New Year's Day

A 20 percent chance of snow after noon. Partly sunny, with a high near 19. Wind chill values as low as zero. North northwest wind around 5 mph becoming west in the afternoon. Winds could gust as high as 10 mph.

Thursday Night

Mostly cloudy, with a low around 11. West wind around 5 mph, with gusts as high as 10 mph.

Friday

Mostly sunny, with a high near 24. Calm wind becoming northwest around 5 mph.

Friday Night

Mostly cloudy, with a low around 14. Calm wind.

Saturday

Partly sunny, with a high near 26.

Saturday Night

Mostly clear, with a low around 10.

Sunday

Partly sunny, with a high near 27.