Caseyville, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Caseyville, IL in one place.
Mostly cloudy, with a high near 76. North wind 5 to 10 mph.
Local Weather Overview
This forecast page for Caseyville, 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: Sep 22, 2026 8:54 PM CDT.
The active forecast window currently covers Sep 23 to Sep 29, 2026 for Caseyville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 23 to Sep 29, 2026
- Latest sync
- Sep 22, 2026 8:54 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Caseyville
Tuesday looks like the warmest upcoming period in Caseyville at 86 degrees F.
Friday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 10 mph N.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 22, 2026 8:54 PM 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
Mostly cloudy, with a low around 58. Northeast wind 3 to 10 mph.
Partly sunny, with a high near 79. Northeast wind 3 to 7 mph.
Partly cloudy, with a low around 60. Northeast wind 2 to 7 mph.
Partly sunny, with a high near 80.
Mostly cloudy, with a low around 56.
Partly sunny, with a high near 76.
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
A slight chance of rain showers before 7am. Partly sunny, with a high near 81. Chance of precipitation is 20%.
Partly cloudy, with a low around 59.
Mostly sunny, with a high near 84.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 23
|
Mostly Cloudy
|
76°F |
5 to 10 mph
N
|
|
Wednesday Night
Sep 23
|
Mostly Cloudy
|
58°F |
3 to 10 mph
NE
|
|
Thursday
Sep 24
|
Partly Sunny
|
79°F |
3 to 7 mph
NE
|
|
Thursday Night
Sep 24
|
Partly Cloudy
|
60°F |
2 to 7 mph
NE
|
|
Friday
Sep 25
|
Partly Sunny
|
80°F |
6 mph
E
|
|
Friday Night
Sep 25
|
Mostly Cloudy
|
56°F |
6 mph
E
|
|
Saturday
Sep 26
|
Partly Sunny
|
76°F |
6 mph
E
|
|
Saturday Night
Sep 26
|
Mostly Cloudy then Slight Chance Rain Showers
|
57°F |
5 mph
E
|
|
Sunday
Sep 27
|
Slight Chance Rain Showers then Partly Sunny
|
81°F |
5 mph
SE
|
|
Sunday Night
Sep 27
|
Partly Cloudy
|
59°F |
5 mph
SE
|
|
Monday
Sep 28
|
Mostly Sunny
|
84°F |
6 mph
SE
|
|
Monday Night
Sep 28
|
Partly Cloudy then Slight Chance Rain Showers
|
62°F |
6 mph
SE
|
|
Tuesday
Sep 29
|
Chance Rain Showers
|
86°F |
6 to 10 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Caseyville.