National Weather Service Forecast for: Naperville, IL
Issued by: National Weather Service Chicago/Romeoville, IL
Updated: Sun, 18-Jan-2026 1:31pm CST

Naperville
 
This
Afternoon
This Afternoon: Chance Snow Showers
Chance Snow Showers
M.L. King Jr.
Day
M.L. King Jr. Day: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Chance Snow then Mostly Cloudy
Chance Snow then Mostly Cloudy
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Partly Sunny then Slight Chance Snow
Partly Sunny then Slight Chance Snow
Saturday

Saturday: Chance Snow
Chance Snow
 
Hi 18 °F Hi 7 °F Hi 21 °F Hi 29 °F Hi 17 °F Hi 18 °F Hi 11 °F  
 
Tonight

Tonight: Snow then Scattered Snow Showers
Snow then Scattered Snow Showers
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Chance Snow
Chance Snow
Wednesday
Night
Wednesday Night: Mostly Cloudy
Mostly Cloudy
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Chance Snow
Chance Snow
Saturday
Night
Saturday Night: Chance Snow
Chance Snow
 
Lo 0 °F Lo 4 °F Lo 15 °F Lo 10 °F Lo 6 °F Lo 2 °F Lo -3 °F  

Cold Weather Advisory issued January 18 at 2:19PM CST until January 19 at 12:00PM CST
Cold Weather Advisory issued January 18 at 10:53AM CST until January 19 at 10:00AM CST
 

This Afternoon
 
A chance of snow showers before 4pm, then snow. Mostly cloudy, with a high near 18. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than half an inch possible.
Tonight
 
Snow before midnight, then scattered snow showers. Mostly cloudy. Low around 0, with temperatures rising to around 4 overnight. Wind chill values as low as -19. West wind 10 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
M.L. King Jr. Day
 
Mostly sunny, with a high near 7. Wind chill values as low as -24. West northwest wind 15 to 25 mph, with gusts as high as 40 mph.
Monday Night
 
Mostly cloudy, with a low around 4. Wind chill values as low as -11. West wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday
 
Sunny, with a high near 21. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
 
A chance of snow. Mostly cloudy, with a low around 15. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Wednesday
 
A chance of snow before noon. Mostly cloudy, with a high near 29. New snow accumulation of less than half an inch possible.
Wednesday Night
 
Mostly cloudy, with a low around 10.
Thursday
 
Mostly sunny, with a high near 17.
Thursday Night
 
Mostly cloudy, with a low around 6.
Friday
 
A slight chance of snow after noon. Partly sunny, with a high near 18.
Friday Night
 
A chance of snow. Mostly cloudy, with a low around 2.
Saturday
 
A chance of snow. Partly sunny, with a high near 11.
Saturday Night
 
A chance of snow. Mostly cloudy, with a low around -3.

 

Forecast from NOAA-NWS for Naperville, IL.
Animated forecast icons courtesy of www.meteotreviglio.com.