Madison County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Madison County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers likely before 10am, then showers and thunderstorms likely. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.
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
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 12:37 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Madison County
Thursday looks like the warmest upcoming period in Madison County at 84 degrees F.
Friday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Friday at about 7 to 10 mph NE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 12:37 AM CDT
- Coverage
- 5 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
Showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Showers and thunderstorms likely before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
A slight chance of rain showers. Partly sunny, with a high near 79. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Showers And Thunderstorms Likely
|
80°F |
5 to 9 mph
E
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms Likely
|
67°F |
6 to 9 mph
SE
|
|
Wednesday
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
83°F |
7 mph
S
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
67°F |
2 to 6 mph
SE
|
|
Thursday
May 28
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
84°F |
6 mph
SE
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms
|
65°F |
3 to 7 mph
E
|
|
Friday
May 29
|
Chance Showers And Thunderstorms
|
79°F |
7 to 10 mph
NE
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms
|
61°F |
9 mph
NE
|
|
Saturday
May 30
|
Slight Chance Rain Showers
|
79°F |
10 mph
NE
|
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.
