Cook County, IL Weather Forecast
County weather hub
Rain Showers
Compare major city weather across Cook County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers before 1pm. Partly sunny. High near 49, with temperatures falling to around 47 in the afternoon. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Cook County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 27 of 27 mapped cities in Cook County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:25 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Cook County
Monday looks like the warmest upcoming period in Cook County at 78 degrees F.
Friday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Sunday at about 15 to 20 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:25 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 37. Northeast wind 5 to 10 mph.
Mostly sunny, with a high near 51. East wind 5 to 10 mph.
A chance of rain showers after 7pm. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 75.
A chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 61.
Showers and thunderstorms likely. Partly sunny, with a high near 78.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 62.
Showers and thunderstorms likely. Mostly cloudy, with a high near 76.
Showers and thunderstorms. Mostly cloudy, with a low around 48.
Showers and thunderstorms likely. Mostly cloudy, with a high near 64.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Rain Showers
|
49°F |
10 mph
N
|
|
Friday Night
Apr 10
|
Mostly Clear
|
37°F |
5 to 10 mph
NE
|
|
Saturday
Apr 11
|
Mostly Sunny
|
51°F |
5 to 10 mph
E
|
|
Saturday Night
Apr 11
|
Chance Rain Showers
|
50°F |
10 to 15 mph
SE
|
|
Sunday
Apr 12
|
Chance Rain Showers
|
75°F |
15 to 20 mph
S
|
|
Sunday Night
Apr 12
|
Showers And Thunderstorms Likely
|
61°F |
15 to 20 mph
SW
|
|
Monday
Apr 13
|
Showers And Thunderstorms Likely
|
78°F |
15 to 20 mph
SW
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
62°F |
15 mph
SSW
|
|
Tuesday
Apr 14
|
Showers And Thunderstorms Likely
|
76°F |
15 mph
SW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms
|
48°F |
15 mph
SSW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
64°F |
15 mph
SSW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
46°F |
10 to 15 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across Cook County.
Coverage
Forecast coverage currently spans 27 of 27 mapped cities in Cook County.
Largest mapped city population in this region: 72,683.
