Cahokia, IL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Cahokia, IL in one place.
A slight chance of rain showers between 8am and 10am, then a slight chance of showers and thunderstorms between 10am and noon, then a chance of showers and thunderstorms between noon and 3pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 102. West wind 2 to 8 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Cahokia, 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 9:53 AM CDT.
The active forecast window currently covers Jul 17 to Jul 23, 2026 for Cahokia, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 9:53 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cahokia
Monday looks like the warmest upcoming period in Cahokia at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 9:53 AM CDT
- Coverage
- 7 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 slight chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 76. Heat index values as high as 101. Southwest wind 2 to 7 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 105. West wind 5 to 10 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Heat index values as high as 101. West wind 2 to 9 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93. North wind around 5 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Chance of precipitation is 30%.
Mostly sunny, with a high near 95.
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.
Partly cloudy, with a low around 66.
Mostly sunny, with a high near 87.
Partly cloudy, with a low around 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 17
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
92°F |
2 to 8 mph
W
|
|
Tonight
Jul 17
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
76°F |
2 to 7 mph
SW
|
|
Saturday
Jul 18
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
94°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
76°F |
2 to 9 mph
W
|
|
Sunday
Jul 19
|
Chance Showers And Thunderstorms
|
93°F |
5 mph
N
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms then Mostly Clear
|
73°F |
1 to 5 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
95°F |
2 to 6 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
77°F |
6 mph
SW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
95°F |
6 to 10 mph
NW
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
71°F |
6 to 9 mph
N
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
86°F |
6 to 10 mph
NE
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
66°F |
3 to 9 mph
NE
|
|
Thursday
Jul 23
|
Mostly Sunny
|
87°F |
3 to 8 mph
E
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
68°F |
2 to 7 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cahokia.
