Chester, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Chester, IL in one place.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 105. South southwest wind 2 to 7 mph. Chance of precipitation is 40%.
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: Jul 9, 2026 12:30 AM CDT.
The active forecast window currently covers Jul 9 to Jul 15, 2026 for Chester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 15, 2026
- Latest sync
- Jul 9, 2026 12:30 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chester
Thursday looks like the warmest upcoming period in Chester at 94 degrees F.
Sunday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Thursday at about 2 to 7 mph SSW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 12:30 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 chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Heat index values as high as 105. South southwest wind around 6 mph. Chance of precipitation is 70%.
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 91. Southwest wind around 6 mph. Chance of precipitation is 70%.
Showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 80%.
Showers and thunderstorms likely before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 88. West northwest wind around 5 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. North northeast wind around 3 mph.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Northeast wind 2 to 7 mph.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 68. Northeast wind 1 to 6 mph.
Sunny, with a high near 88. North northeast wind 2 to 7 mph.
Mostly clear, with a low around 68. Northeast wind 1 to 6 mph.
Sunny, with a high near 90. Northeast wind 1 to 6 mph.
Mostly clear, with a low around 70. South southeast wind 0 to 3 mph.
Sunny, with a high near 92. North wind 0 to 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Mostly Sunny then Chance Showers And Thunderstorms
|
94°F |
2 to 7 mph
SSW
|
|
Thursday Night
Jul 9
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
73°F |
6 mph
SSW
|
|
Friday
Jul 10
|
Chance Showers And Thunderstorms
|
91°F |
6 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms
|
71°F |
5 mph
SW
|
|
Saturday
Jul 11
|
Showers And Thunderstorms Likely
|
88°F |
5 mph
WNW
|
|
Saturday Night
Jul 11
|
Showers And Thunderstorms Likely
|
69°F |
3 mph
NNE
|
|
Sunday
Jul 12
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
86°F |
2 to 7 mph
NE
|
|
Sunday Night
Jul 12
|
Chance Showers And Thunderstorms then Partly Cloudy
|
68°F |
1 to 6 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
88°F |
2 to 7 mph
NNE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
68°F |
1 to 6 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
1 to 6 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
0 to 3 mph
SSE
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
0 to 3 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chester.
