Glen Carbon, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Glen Carbon, IL in one place.
A chance of rain showers between 7am and 10am, then showers and thunderstorms likely. Mostly cloudy, with a high near 81. East wind 5 to 8 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Glen Carbon, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 24, 2026 10:06 AM CDT.
The active forecast window currently covers May 26 to May 30, 2026 for Glen Carbon, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 10:06 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Glen Carbon
Wednesday looks like the warmest upcoming period in Glen Carbon at 85 degrees F.
Saturday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Friday at about 6 to 12 mph E.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 10:06 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 60%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 60%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Showers And Thunderstorms Likely
|
81°F |
5 to 8 mph
E
|
|
Tuesday Night
May 26
|
Showers And Thunderstorms Likely
|
67°F |
3 to 7 mph
SE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms
|
85°F |
6 mph
S
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
68°F |
5 mph
E
|
|
Thursday
May 28
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
85°F |
2 to 7 mph
E
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
67°F |
6 mph
E
|
|
Friday
May 29
|
Chance Showers And Thunderstorms
|
80°F |
6 to 12 mph
E
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms
|
62°F |
7 to 10 mph
NE
|
|
Saturday
May 30
|
Chance Showers And Thunderstorms
|
79°F |
8 to 12 mph
NE
|
|
Saturday Night
May 30
|
Chance Showers And Thunderstorms then Partly Cloudy
|
60°F |
6 to 9 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Glen Carbon.
