National Weather Service Forecast for: Romeoville IL
Issued by: National Weather Service Chicago, IL
Updated: 3:11 pm CST Dec 22, 2025
 
This
Afternoon
This Afternoon: A 20 percent chance of rain. Cloudy, with a high near 43. South wind around 10 mph.
Slight Chance
Rain
 Tonight

Tonight: A 20 percent chance of rain before 9pm. Cloudy, with a low around 37. Southwest wind around 10 mph.
Slight Chance
Rain then
Cloudy
 Tuesday

Tuesday: Partly sunny, with a high near 48. West northwest wind 5 to 10 mph.
Partly Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 30. West northwest wind around 5 mph becoming calm.
Mostly Cloudy

 Wednesday

Wednesday: A 30 percent chance of rain or drizzle after noon. Cloudy, with a high near 43. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Mostly Cloudy
then Chance
Rain
 Wednesday
Night
Wednesday Night: Rain or drizzle likely, mainly before midnight. Patchy fog. Otherwise, cloudy, with a low around 40. Chance of precipitation is 60%.
Rain Likely
and Patchy
Fog
 Christmas
Day
Christmas Day: Cloudy, with a high near 47.
Cloudy

 Thursday
Night
Thursday Night: Rain likely, mainly after midnight. Cloudy, with a low around 42.
Rain Likely

 Friday

Friday: Mostly cloudy, with a high near 52.
Mostly Cloudy
Hi 43 °F Lo 37 °F Hi 48 °F Lo 30 °F Hi 43 °F Lo 40 °F Hi 47 °F Lo 42 °F Hi 52 °F

 

This Afternoon
 
 A 20 percent chance of rain. Cloudy, with a high near 43. South wind around 10 mph.
Tonight
 
 A 20 percent chance of rain before 9pm. Cloudy, with a low around 37. Southwest wind around 10 mph.
Tuesday
 
 Partly sunny, with a high near 48. West northwest wind 5 to 10 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 30. West northwest wind around 5 mph becoming calm.
Wednesday
 
 A 30 percent chance of rain or drizzle after noon. Cloudy, with a high near 43. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
 
 Rain or drizzle likely, mainly before midnight. Patchy fog. Otherwise, cloudy, with a low around 40. Chance of precipitation is 60%.
Christmas Day
 
 Cloudy, with a high near 47.
Thursday Night
 
 Rain likely, mainly after midnight. Cloudy, with a low around 42.
Friday
 
 Mostly cloudy, with a high near 52.
Friday Night
 
 Mostly cloudy, with a low around 38.
Saturday
 
 Mostly cloudy, with a high near 52.
Saturday Night
 
 Mostly cloudy, with a low around 28. Blustery.
Sunday
 
 Mostly sunny, with a high near 33. Breezy.
Sunday Night
 
 Partly cloudy, with a low around 14.
Monday
 
 Mostly sunny, with a high near 27.

 

Forecast from NOAA-NWS for Romeoville IL.