National Weather Service Forecast for: Romeoville IL
Issued by: National Weather Service Chicago, IL
Updated: 3:51 am CDT Aug 20, 2026
 
Today

Today: Sunny, with a high near 80. East northeast wind around 5 mph, with gusts as high as 10 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm.
Mostly Clear

 Friday

Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Slight Chance
T-storms then
Chance
T-storms
 Friday
Night
Friday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. South southwest wind around 5 mph, with gusts as high as 10 mph.
Chance
T-storms

 Saturday

Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunny then
Slight Chance
T-storms
 Saturday
Night
Saturday Night: Mostly clear, with a low around 60.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 76.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 58.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 76.
Mostly Sunny
Hi 80 °F Lo 60 °F Hi 79 °F Lo 64 °F Hi 78 °F Lo 60 °F Hi 76 °F Lo 58 °F Hi 76 °F

Hazardous Weather Outlook
 

Today
 
 Sunny, with a high near 80. East northeast wind around 5 mph, with gusts as high as 10 mph.
Tonight
 
 Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm.
Friday
 
 A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
 
 A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. South southwest wind around 5 mph, with gusts as high as 10 mph.
Saturday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
 
 Mostly clear, with a low around 60.
Sunday
 
 Sunny, with a high near 76.
Sunday Night
 
 Partly cloudy, with a low around 58.
Monday
 
 Mostly sunny, with a high near 76.
Monday Night
 
 Partly cloudy, with a low around 60.
Tuesday
 
 Mostly sunny, with a high near 79.
Tuesday Night
 
 Partly cloudy, with a low around 64.
Wednesday
 
 Mostly sunny, with a high near 80.

 

Forecast from NOAA-NWS for Romeoville IL.