National Weather Service Forecast for: Arlington Heights IL
Issued by: National Weather Service Chicago, IL
Updated: 3:11 am CST Dec 5, 2025
 
Overnight

Overnight: Mostly cloudy, with a low around 5. Wind chill values as low as -9. South southwest wind around 10 mph, with gusts as high as 15 mph.
Mostly Cloudy

 Friday

Friday: Partly sunny, with a high near 26. Wind chill values as low as -5. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Partly Sunny

 Friday
Night
Friday Night: Patchy snow and freezing rain before 3am. Mostly cloudy, with a low around 24. 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 high near 26. West northwest wind 5 to 10 mph becoming light north in the afternoon.
Partly Sunny

 Saturday
Night
Saturday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 17. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Slight Chance
Snow then
Snow Likely
 Sunday

Sunday: Snow likely before noon. Partly sunny, with a high near 26. Chance of precipitation is 60%.
Snow Likely
then Mostly
Sunny
 Sunday
Night
Sunday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 10.
Slight Chance
Snow Showers
 Monday

Monday: Partly sunny, with a high near 22.
Partly Sunny

 Monday
Night
Monday Night: A chance of snow. Mostly cloudy, with a low around 15.
Chance Snow
Lo 5 °F Hi 26 °F Lo 24 °F Hi 26 °F Lo 17 °F Hi 26 °F Lo 10 °F Hi 22 °F Lo 15 °F

Hazardous Weather Outlook
Hydrologic Outlook
 

Overnight
 
 Mostly cloudy, with a low around 5. Wind chill values as low as -9. South southwest wind around 10 mph, with gusts as high as 15 mph.
Friday
 
 Partly sunny, with a high near 26. Wind chill values as low as -5. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
 
 Patchy snow and freezing rain before 3am. Mostly cloudy, with a low around 24. 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 high near 26. West northwest wind 5 to 10 mph becoming light north in the afternoon.
Saturday Night
 
 Snow likely, mainly after midnight. Mostly cloudy, with a low around 17. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Sunday
 
 Snow likely before noon. Partly sunny, with a high near 26. Chance of precipitation is 60%.
Sunday Night
 
 A 20 percent chance of snow showers. Mostly cloudy, with a low around 10.
Monday
 
 Partly sunny, with a high near 22.
Monday Night
 
 A chance of snow. Mostly cloudy, with a low around 15.
Tuesday
 
 Mostly cloudy, with a high near 35.
Tuesday Night
 
 Rain and snow. Cloudy, with a low around 28.
Wednesday
 
 A chance of rain and snow. Cloudy, with a high near 36.
Wednesday Night
 
 A chance of snow. Mostly cloudy, with a low around 14.
Thursday
 
 A chance of snow. Partly sunny, with a high near 23.

 

Forecast from NOAA-NWS for Arlington Heights IL.