St. Charles, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for St. Charles, IL in one place.
A chance of showers and thunderstorms between 8am and 4pm, then showers and thunderstorms likely. Mostly cloudy. High near 84, with temperatures falling to around 82 in the afternoon. West southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for St. Charles, 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 8, 2026 1:34 PM CDT.
The active forecast window currently covers Jul 9 to Jul 14, 2026 for St. Charles, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 1:34 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in St. Charles
Tuesday looks like the warmest upcoming period in St. Charles at 90 degrees F.
Friday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Thursday at about 5 to 10 mph WSW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 1:34 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. North northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 7am. Partly sunny, with a high near 83. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Mostly cloudy, with a low around 62.
Mostly sunny, with a high near 84.
Partly cloudy, with a low around 66.
Sunny, with a high near 86.
Mostly clear, with a low around 67.
Sunny, with a high near 89.
Mostly clear, with a low around 70.
Sunny, with a high near 90.
Mostly clear, with a low around 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Chance Showers And Thunderstorms
|
84°F |
5 to 10 mph
WSW
|
|
Thursday Night
Jul 9
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
66°F |
5 mph
NNE
|
|
Friday
Jul 10
|
Chance Showers And Thunderstorms then Partly Sunny
|
83°F |
5 to 10 mph
NE
|
|
Friday Night
Jul 10
|
Mostly Cloudy
|
62°F |
5 to 10 mph
NE
|
|
Saturday
Jul 11
|
Mostly Sunny
|
84°F |
5 to 10 mph
NE
|
|
Saturday Night
Jul 11
|
Partly Cloudy
|
66°F |
0 to 10 mph
NE
|
|
Sunday
Jul 12
|
Sunny
|
86°F |
0 to 5 mph
NE
|
|
Sunday Night
Jul 12
|
Mostly Clear
|
67°F |
0 to 5 mph
NNW
|
|
Monday
Jul 13
|
Sunny
|
89°F |
5 to 10 mph
NW
|
|
Monday Night
Jul 13
|
Mostly Clear
|
70°F |
5 to 10 mph
W
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
5 to 10 mph
W
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
71°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around St. Charles.
