Illinois Weather Forecast
State weather hub
Mostly Clear
Compare major city weather across Illinois, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear, with a low around 58. South wind around 7 mph.
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
- Apr 23 to Apr 29, 2026
- Latest sync
- Apr 23, 2026 5:38 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Illinois
Thursday looks like the warmest upcoming period in Illinois at 81 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Thursday at about 8 to 22 mph S.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 23, 2026 5:38 AM CDT
- Coverage
- 7 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
Sunny, with a high near 81. South wind 8 to 22 mph, with gusts as high as 30 mph.
A chance of showers and thunderstorms between 1am and 4am, then showers and thunderstorms likely. Mostly cloudy, with a low around 61. South wind 15 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 73. West southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 48. North northwest wind 8 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 74. North northeast wind around 10 mph.
Partly cloudy, with a low around 49. East northeast wind around 9 mph, with gusts as high as 16 mph.
A slight chance of rain showers after 1pm. Partly sunny, with a high near 74.
A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Showers and thunderstorms. Mostly cloudy, with a high near 74.
Showers and thunderstorms. Mostly cloudy, with a low around 50.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 68.
Mostly clear, with a low around 46.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 23
|
Mostly Clear
|
58°F |
7 mph
S
|
|
Thursday
Apr 23
|
Sunny
|
81°F |
8 to 22 mph
S
|
|
Thursday Night
Apr 23
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
61°F |
15 to 21 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
73°F |
15 mph
WSW
|
|
Friday Night
Apr 24
|
Chance Showers And Thunderstorms then Partly Cloudy
|
48°F |
8 to 12 mph
NNW
|
|
Saturday
Apr 25
|
Sunny
|
74°F |
10 mph
NNE
|
|
Saturday Night
Apr 25
|
Partly Cloudy
|
49°F |
9 mph
ENE
|
|
Sunday
Apr 26
|
Partly Sunny then Slight Chance Rain Showers
|
74°F |
10 to 15 mph
ESE
|
|
Sunday Night
Apr 26
|
Showers And Thunderstorms Likely
|
58°F |
14 to 20 mph
ESE
|
|
Monday
Apr 27
|
Showers And Thunderstorms
|
74°F |
22 mph
S
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms
|
50°F |
16 to 20 mph
WSW
|
|
Tuesday
Apr 28
|
Slight Chance Rain Showers then Mostly Sunny
|
68°F |
16 mph
W
|
|
Tuesday Night
Apr 28
|
Mostly Clear
|
46°F |
5 to 13 mph
WNW
|
|
Wednesday
Apr 29
|
Mostly Sunny then Slight Chance Rain Showers
|
67°F |
7 to 13 mph
W
|
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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