National Weather Service Forecast for: Romeoville IL
Issued by: National Weather Service Chicago, IL
Updated: 6:01 am CST Dec 5, 2025
 
Today

Today: Patchy freezing fog before 9am. Partly sunny, with a high near 26. Wind chill values as low as -6. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Patchy
Freezing Fog
then Partly
Sunny
 Tonight

Tonight: Patchy snow and freezing rain between 9pm and 3am. Mostly cloudy, with a temperature rising to around 30 by 1am. South southwest wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Patchy Wintry
Mix

 Saturday

Saturday: Partly sunny, with a temperature falling to around 22 by 5pm. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.
Partly Sunny

 Saturday
Night
Saturday Night: Snow likely, mainly after midnight. Cloudy, with a low around 18. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Slight Chance
Snow then
Snow Likely
 Sunday

Sunday: Snow likely before noon. Partly sunny, with a high near 26. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Snow Likely
then Partly
Sunny
 Sunday
Night
Sunday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 7.
Slight Chance
Snow Showers
then Mostly
Cloudy
 Monday

Monday: Partly sunny, with a high near 20.
Partly Sunny

 Monday
Night
Monday Night: A chance of snow. Mostly cloudy, with a low around 13.
Chance Snow

 Tuesday

Tuesday: Mostly cloudy, with a high near 34.
Mostly Cloudy
Hi 26 °F Lo 24 °F⇑ Hi 26 °F⇓ Lo 18 °F Hi 26 °F Lo 7 °F Hi 20 °F Lo 13 °F Hi 34 °F

Hazardous Weather Outlook
Hydrologic Outlook
 

Today
 
 Patchy freezing fog before 9am. Partly sunny, with a high near 26. Wind chill values as low as -6. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
 
 Patchy snow and freezing rain between 9pm and 3am. Mostly cloudy, with a temperature rising to around 30 by 1am. South southwest wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Saturday
 
 Partly sunny, with a temperature falling to around 22 by 5pm. West northwest wind 5 to 10 mph becoming light and variable in the afternoon.
Saturday Night
 
 Snow likely, mainly after midnight. Cloudy, with a low around 18. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Sunday
 
 Snow likely before noon. Partly sunny, with a high near 26. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
 
 A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 7.
Monday
 
 Partly sunny, with a high near 20.
Monday Night
 
 A chance of snow. Mostly cloudy, with a low around 13.
Tuesday
 
 Mostly cloudy, with a high near 34.
Tuesday Night
 
 A chance of rain and snow before midnight, then rain likely. Cloudy, with a low around 29.
Wednesday
 
 A chance of rain and snow. Cloudy, with a high near 35.
Wednesday Night
 
 A chance of snow. Mostly cloudy, with a low around 14.
Thursday
 
 Partly sunny, with a high near 22.

 

Forecast from NOAA-NWS for Romeoville IL.