Chester, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chester, IL in one place.
Sunny, with a high near 93. Heat index values as high as 105. South southwest wind 6 to 14 mph, with gusts as high as 20 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: Jun 9, 2026 2:12 AM CDT.
The active forecast window currently covers Jun 10 to Jun 15, 2026 for Chester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 10 to Jun 15, 2026
- Latest sync
- Jun 9, 2026 2:12 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chester
Wednesday looks like the warmest upcoming period in Chester at 93 degrees F.
Sunday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Thursday at about 7 to 16 mph SSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 9, 2026 2:12 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
Mostly clear, with a low around 74. South southwest wind 7 to 14 mph, with gusts as high as 20 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. South southwest wind 7 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
A chance of showers and thunderstorms before 7am. Partly sunny, with a high near 86. Northwest wind around 6 mph.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 64. Southeast wind 1 to 5 mph.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 88. South wind around 5 mph.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind around 5 mph.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. North northwest wind 3 to 8 mph.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 63. North northeast wind 3 to 8 mph.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. South southwest wind around 7 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jun 10
|
Sunny
|
93°F |
6 to 14 mph
SSW
|
|
Wednesday Night
Jun 10
|
Mostly Clear
|
74°F |
7 to 14 mph
SSW
|
|
Thursday
Jun 11
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
92°F |
7 to 16 mph
SSW
|
|
Thursday Night
Jun 11
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
69°F |
5 to 15 mph
WSW
|
|
Friday
Jun 12
|
Chance Showers And Thunderstorms then Partly Sunny
|
86°F |
6 mph
NW
|
|
Friday Night
Jun 12
|
Partly Cloudy then Slight Chance Rain Showers
|
64°F |
1 to 5 mph
SE
|
|
Saturday
Jun 13
|
Chance Showers And Thunderstorms
|
88°F |
5 mph
S
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
67°F |
5 mph
SW
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
86°F |
3 to 8 mph
NNW
|
|
Sunday Night
Jun 14
|
Chance Showers And Thunderstorms
|
63°F |
3 to 8 mph
NNE
|
|
Monday
Jun 15
|
Chance Rain Showers
|
83°F |
7 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chester.
