National Weather Service Forecast for: Mount Prospect IL
Issued by: National Weather Service Chicago, IL
Updated: 4:26 am CDT Apr 6, 2026
 
Today

Today: Partly sunny, with a high near 49. West northwest wind around 15 mph, with gusts as high as 30 mph.
Partly Sunny

 Tonight

Tonight: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 27. North wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy
then Slight
Chance Snow
Showers
 Tuesday

Tuesday: Mostly sunny, with a high near 39. North northeast wind around 10 mph.
Mostly Sunny

 Tuesday
Night
Tuesday Night: A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 31. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Mostly Cloudy
then Slight
Chance
Rain/Snow
 Wednesday

Wednesday: Mostly cloudy, with a high near 64. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Mostly Cloudy
and Breezy

 Wednesday
Night
Wednesday Night: A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 54.
Chance
Showers

 Thursday

Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
Chance
Showers

 Thursday
Night
Thursday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 47.
Showers
Likely

 Friday

Friday: A chance of showers before 1pm. Partly sunny, with a high near 58.
Chance
Showers
Hi 49 °F Lo 27 °F Hi 39 °F Lo 31 °F Hi 64 °F Lo 54 °F Hi 65 °F Lo 47 °F Hi 58 °F

 

Today
 
 Partly sunny, with a high near 49. West northwest wind around 15 mph, with gusts as high as 30 mph.
Tonight
 
 A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 27. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
 
 Mostly sunny, with a high near 39. North northeast wind around 10 mph.
Tuesday Night
 
 A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 31. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
 
 Mostly cloudy, with a high near 64. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
 
 A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 54.
Thursday
 
 A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
Thursday Night
 
 Showers likely, mainly before 1am. Mostly cloudy, with a low around 47.
Friday
 
 A chance of showers before 1pm. Partly sunny, with a high near 58.
Friday Night
 
 A chance of showers. Partly cloudy, with a low around 42.
Saturday
 
 A chance of showers. Partly sunny, with a high near 59.
Saturday Night
 
 A chance of showers. Mostly cloudy, with a low around 50.
Sunday
 
 A chance of showers. Mostly cloudy, with a high near 75.

 

Forecast from NOAA-NWS for Mount Prospect IL.