National Weather Service Forecast for: Downers Grove IL
Issued by: National Weather Service Chicago, IL
Updated: 3:21 am CST Dec 18, 2025
 
Overnight

Overnight: A slight chance of showers before 4am, then showers likely with areas of drizzle after 4am. Cloudy, with a steady temperature around 44. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Showers
Likely and
Breezy
 Thursday

Thursday: Showers with areas of drizzle before 3pm, then showers likely between 3pm and 5pm. Temperature rising to near 50 by noon, then falling to around 37 during the remainder of the day. Breezy, with a south wind 15 to 25 mph becoming west northwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Breezy.
Showers
Likely then
Showers
 Thursday
Night
Thursday Night: A chance of snow showers before 3am, then a chance of flurries after 3am. Cloudy, with a low around 12. Wind chill values as low as -6. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.
Chance Snow
Showers and
Breezy
 Friday

Friday: Mostly cloudy, then gradually becoming sunny, with a high near 26. Wind chill values as low as -7. Blustery, with a west northwest wind 15 to 20 mph becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.
Decreasing
Clouds and
Blustery then
Mostly Sunny
 Friday
Night
Friday Night: Mostly cloudy, with a low around 22. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Cloudy

 Saturday

Saturday: A slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Mostly Cloudy
then Slight
Chance
Rain/Snow
 Saturday
Night
Saturday Night: Mostly clear, with a low around 18.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 27.
Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 20.
Mostly Cloudy
Lo 44 °F Hi 50 °F⇓ Lo 12 °F Hi 26 °F Lo 22 °F Hi 41 °F Lo 18 °F Hi 27 °F Lo 20 °F

 

Overnight
 
 A slight chance of showers before 4am, then showers likely with areas of drizzle after 4am. Cloudy, with a steady temperature around 44. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
 Showers with areas of drizzle before 3pm, then showers likely between 3pm and 5pm. Temperature rising to near 50 by noon, then falling to around 37 during the remainder of the day. Breezy, with a south wind 15 to 25 mph becoming west northwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
 
 A chance of snow showers before 3am, then a chance of flurries after 3am. Cloudy, with a low around 12. Wind chill values as low as -6. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.
Friday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 26. Wind chill values as low as -7. Blustery, with a west northwest wind 15 to 20 mph becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
 
 Mostly cloudy, with a low around 22. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
 
 A slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Saturday Night
 
 Mostly clear, with a low around 18.
Sunday
 
 Sunny, with a high near 27.
Sunday Night
 
 Mostly cloudy, with a low around 20.
Monday
 
 Mostly cloudy, with a high near 38.
Monday Night
 
 Mostly cloudy, with a low around 34.
Tuesday
 
 Mostly cloudy, with a high near 44.
Tuesday Night
 
 Mostly cloudy, with a low around 32.
Wednesday
 
 Mostly cloudy, with a high near 43.

 

Forecast from NOAA-NWS for Downers Grove IL.