Chester, IL Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chester, IL in one place.
Patchy fog before 9am. Mostly sunny, with a high near 84. East southeast wind around 2 mph.
Local Weather Overview
This forecast page for Chester, 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: Aug 23, 2026 6:30 PM CDT.
The active forecast window currently covers Aug 24 to Aug 29, 2026 for Chester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 24 to Aug 29, 2026
- Latest sync
- Aug 23, 2026 6:30 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chester
Wednesday looks like the warmest upcoming period in Chester at 89 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Thursday at about 2 to 7 mph NW.
The forecast from Aug 24 through Aug 29 stays mostly dry.
Forecast Details
- Last updated
- Aug 23, 2026 6:30 PM 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
Mostly clear, with a low around 60. East wind around 2 mph.
Sunny, with a high near 86. East southeast wind 1 to 5 mph.
Partly cloudy, with a low around 66. East southeast wind around 2 mph.
Mostly sunny, with a high near 89. South wind around 2 mph.
Partly cloudy, with a low around 67. West southwest wind around 2 mph.
Sunny, with a high near 88. Northwest wind 2 to 7 mph.
Mostly clear, with a low around 65. North wind 0 to 5 mph.
Sunny, with a high near 87. North wind around 2 mph.
Mostly clear, with a low around 65. East wind around 1 mph.
Mostly sunny, with a high near 88. South southeast wind 0 to 5 mph.
Partly cloudy, with a low around 68. South southeast wind around 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Patchy Fog then Mostly Sunny
|
84°F |
2 mph
ESE
|
|
Monday Night
Aug 24
|
Mostly Clear
|
60°F |
2 mph
E
|
|
Tuesday
Aug 25
|
Sunny
|
86°F |
1 to 5 mph
ESE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
66°F |
2 mph
ESE
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
89°F |
2 mph
S
|
|
Wednesday Night
Aug 26
|
Partly Cloudy
|
67°F |
2 mph
WSW
|
|
Thursday
Aug 27
|
Sunny
|
88°F |
2 to 7 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
65°F |
0 to 5 mph
N
|
|
Friday
Aug 28
|
Sunny
|
87°F |
2 mph
N
|
|
Friday Night
Aug 28
|
Mostly Clear
|
65°F |
1 mph
E
|
|
Saturday
Aug 29
|
Mostly Sunny
|
88°F |
0 to 5 mph
SSE
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
68°F |
3 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chester.
