Madison County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across Madison County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 82. Southeast wind around 5 mph.
County Weather Overview
This county weather page brings together forecast coverage for Madison County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 17 of 17 mapped cities in Madison County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 24 to Aug 29, 2026
- Latest sync
- Aug 23, 2026 1:21 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Madison County
Wednesday looks like the warmest upcoming period in Madison County at 88 degrees F.
Monday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Thursday at about 2 to 10 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 23, 2026 1:21 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 63. East wind 2 to 6 mph.
Mostly sunny, with a high near 84. Southeast wind around 6 mph.
Partly cloudy, with a low around 67.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Chance of precipitation is 20%.
Sunny, with a high near 87.
Mostly clear, with a low around 66.
Sunny, with a high near 85.
Mostly clear, with a low around 66.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Sunny
|
82°F |
5 mph
SE
|
|
Monday Night
Aug 24
|
Partly Cloudy
|
63°F |
2 to 6 mph
E
|
|
Tuesday
Aug 25
|
Mostly Sunny
|
84°F |
6 mph
SE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
67°F |
5 mph
SE
|
|
Wednesday
Aug 26
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
2 to 6 mph
SW
|
|
Wednesday Night
Aug 26
|
Slight Chance Showers And Thunderstorms
|
68°F |
1 to 6 mph
SW
|
|
Thursday
Aug 27
|
Sunny
|
87°F |
2 to 10 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
66°F |
1 to 8 mph
N
|
|
Friday
Aug 28
|
Sunny
|
85°F |
0 to 6 mph
NW
|
|
Friday Night
Aug 28
|
Mostly Clear
|
66°F |
5 mph
NE
|
|
Saturday
Aug 29
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
86°F |
3 to 7 mph
SE
|
|
Saturday Night
Aug 29
|
Chance Showers And Thunderstorms
|
69°F |
7 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Madison County.
Coverage
Forecast coverage currently spans 17 of 17 mapped cities in Madison County.
Largest mapped city population in this region: 29,251.
