National Weather Service Forecast for: Romeoville IL
Issued by: National Weather Service Chicago, IL
Updated: 1:21 am CST Dec 23, 2025
 
Overnight

Overnight: Mostly cloudy, with a low around 37. Southwest wind 5 to 10 mph.
Mostly Cloudy

 Tuesday

Tuesday: Partly sunny, with a high near 49. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Partly Sunny

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 31. Northwest wind around 5 mph becoming east after midnight. Winds could gust as high as 10 mph.
Partly Cloudy

 Wednesday

Wednesday: Areas of drizzle with scattered showers after 3pm. Mostly cloudy, with a high near 43. South southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.
Mostly Cloudy
then Areas
Drizzle
 Wednesday
Night
Wednesday Night: Showers likely with intermittent drizzle before midnight, then patchy drizzle with isolated showers between midnight and 3am, then patchy drizzle after 3am. Patchy fog. Otherwise, cloudy, with a low around 38. South southeast wind around 5 mph becoming calm. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Showers
Likely and
Patchy Fog
 Christmas
Day
Christmas Day: Cloudy, with a high near 42.
Cloudy

 Thursday
Night
Thursday Night: Rain likely, mainly after midnight. Cloudy, with a low around 40. Chance of precipitation is 70%.
Chance Rain
then Rain
Likely
 Friday

Friday: Mostly cloudy, with a high near 50.
Mostly Cloudy

 Friday
Night
Friday Night: Mostly cloudy, with a low around 41.
Mostly Cloudy
Lo 37 °F Hi 49 °F Lo 31 °F Hi 43 °F Lo 38 °F Hi 42 °F Lo 40 °F Hi 50 °F Lo 41 °F

 

Overnight
 
 Mostly cloudy, with a low around 37. Southwest wind 5 to 10 mph.
Tuesday
 
 Partly sunny, with a high near 49. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 31. Northwest wind around 5 mph becoming east after midnight. Winds could gust as high as 10 mph.
Wednesday
 
 Areas of drizzle with scattered showers after 3pm. Mostly cloudy, with a high near 43. South southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.
Wednesday Night
 
 Showers likely with intermittent drizzle before midnight, then patchy drizzle with isolated showers between midnight and 3am, then patchy drizzle after 3am. Patchy fog. Otherwise, cloudy, with a low around 38. South southeast wind around 5 mph becoming calm. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Christmas Day
 
 Cloudy, with a high near 42.
Thursday Night
 
 Rain likely, mainly after midnight. Cloudy, with a low around 40. Chance of precipitation is 70%.
Friday
 
 Mostly cloudy, with a high near 50.
Friday Night
 
 Mostly cloudy, with a low around 41.
Saturday
 
 Mostly cloudy, with a high near 52.
Saturday Night
 
 Mostly cloudy, with a low around 25. Blustery.
Sunday
 
 Mostly sunny, with a high near 30. Blustery.
Sunday Night
 
 Partly cloudy, with a low around 12. Blustery.
Monday
 
 Mostly sunny, with a high near 24.

 

Forecast from NOAA-NWS for Romeoville IL.