Illinois Weather Forecast
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Partly Sunny then Slight Chance Showers And Thunderstorms
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A slight chance of showers and thunderstorms between 1pm and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
State Weather Overview
This state weather page brings together forecast coverage for Illinois so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 189 of 189 mapped cities in Illinois.
Page Snapshot
- Page focus
- state weather
- Forecast window
- Jul 9 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 1:38 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Illinois
Thursday looks like the warmest upcoming period in Illinois at 89 degrees F.
Sunday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Thursday at about 5 to 10 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 1:38 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. North northwest wind 3 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. West northwest wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Northeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. East southeast wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 67.
Sunny, with a high near 88.
Mostly clear, with a low around 69.
Sunny, with a high near 89.
Mostly clear, with a low around 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
SW
|
|
Thursday Night
Jul 9
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
69°F |
3 to 8 mph
NNW
|
|
Friday
Jul 10
|
Showers And Thunderstorms Likely
|
84°F |
7 mph
WNW
|
|
Friday Night
Jul 10
|
Chance Showers And Thunderstorms
|
68°F |
7 mph
NE
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
84°F |
6 to 9 mph
ESE
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
68°F |
5 to 9 mph
NE
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
6 to 9 mph
NE
|
|
Sunday Night
Jul 12
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
67°F |
3 to 8 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
88°F |
5 to 8 mph
NNE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
69°F |
3 to 7 mph
SSE
|
|
Tuesday
Jul 14
|
Sunny
|
89°F |
5 to 8 mph
NNW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
7 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across Illinois.
Coverage
Forecast coverage currently spans 189 of 189 mapped cities in Illinois.
Largest mapped city population in this region: 2,677,643.
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