Chesterfield, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Chesterfield, IL in one place.
A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 90. West wind 1 to 7 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Chesterfield, 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 16, 2026 5:00 AM CDT.
The active forecast window currently covers Jul 17 to Jul 22, 2026 for Chesterfield, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 22, 2026
- Latest sync
- Jul 16, 2026 5:00 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chesterfield
Saturday looks like the warmest upcoming period in Chesterfield at 92 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Saturday at about 6 to 10 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 5:00 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
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. West wind around 5 mph. Chance of precipitation is 40%.
Sunny, with a high near 92.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 70. Chance of precipitation is 20%.
Sunny, with a high near 88.
Mostly clear, with a low around 67.
Mostly sunny, with a high near 92.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Partly cloudy, with a low around 66.
Mostly sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
90°F |
1 to 7 mph
W
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Partly Cloudy
|
72°F |
5 mph
W
|
|
Saturday
Jul 18
|
Sunny
|
92°F |
6 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
70°F |
3 to 8 mph
NW
|
|
Sunday
Jul 19
|
Sunny
|
88°F |
6 mph
NE
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
67°F |
5 mph
SE
|
|
Monday
Jul 20
|
Mostly Sunny
|
92°F |
6 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
72°F |
6 mph
W
|
|
Tuesday
Jul 21
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
91°F |
6 to 10 mph
NW
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
66°F |
5 to 9 mph
N
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
85°F |
5 to 9 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chesterfield.