East Alton, IL Weather Forecast
Local 7-day forecast
Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for East Alton, IL in one place.
A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 94. Heat index values as high as 102. West wind 6 to 12 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for East Alton, 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: Jul 17, 2026 6:21 AM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for East Alton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:21 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in East Alton
Monday looks like the warmest upcoming period in East Alton at 96 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 13 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 6:21 AM 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
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Northwest wind 2 to 9 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Sunny, with a high near 92. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Chance of precipitation is 20%.
Mostly sunny, with a high near 96.
Partly cloudy, with a low around 77.
Mostly sunny, with a high near 95.
Partly cloudy, with a low around 71.
Mostly sunny, with a high near 86.
Mostly clear, with a low around 65.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
94°F |
6 to 12 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
75°F |
2 to 9 mph
NW
|
|
Sunday
Jul 19
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
92°F |
6 mph
NE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
2 to 6 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
96°F |
2 to 7 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
77°F |
7 mph
SW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
95°F |
6 to 13 mph
NW
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
71°F |
7 to 12 mph
N
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
86°F |
7 to 12 mph
NE
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
65°F |
3 to 9 mph
NE
|
|
Thursday
Jul 23
|
Slight Chance Rain Showers
|
86°F |
3 to 8 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around East Alton.