St. Charles, IL Weather Forecast
Local 7-day forecast
Partly Sunny then Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for St. Charles, IL in one place.
Showers and thunderstorms after 1pm. Partly sunny. High near 86, with temperatures falling to around 84 in the afternoon. South southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters 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: Jun 10, 2026 10:44 AM CDT.
The active forecast window currently covers Jun 11 to Jun 16, 2026 for St. Charles, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 11 to Jun 16, 2026
- Latest sync
- Jun 10, 2026 10:44 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in St. Charles
Thursday looks like the warmest upcoming period in St. Charles at 86 degrees F.
Sunday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Thursday at about 10 to 20 mph SSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 10, 2026 10:44 AM 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 before 1am. Mostly cloudy, with a low around 59. West southwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.
Sunny, with a high near 77. West wind 10 to 15 mph, with gusts as high as 30 mph.
Mostly clear, with a low around 62.
Sunny, with a high near 81.
Showers and thunderstorms likely after 7pm. Mostly cloudy, with a low around 62.
Showers and thunderstorms likely before 7am. Partly sunny, with a high near 75.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 55.
A slight chance of rain showers. Partly sunny, with a high near 74.
A slight chance of rain showers. Partly cloudy, with a low around 55.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 75.
A chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jun 11
|
Partly Sunny then Showers And Thunderstorms
|
86°F |
10 to 20 mph
SSW
|
|
Thursday Night
Jun 11
|
Showers And Thunderstorms
|
59°F |
10 to 20 mph
WSW
|
|
Friday
Jun 12
|
Sunny
|
77°F |
10 to 15 mph
W
|
|
Friday Night
Jun 12
|
Mostly Clear
|
62°F |
5 to 15 mph
WSW
|
|
Saturday
Jun 13
|
Sunny
|
81°F |
10 to 20 mph
SW
|
|
Saturday Night
Jun 13
|
Showers And Thunderstorms Likely
|
62°F |
5 to 15 mph
WSW
|
|
Sunday
Jun 14
|
Showers And Thunderstorms Likely then Partly Sunny
|
75°F |
10 to 15 mph
NNW
|
|
Sunday Night
Jun 14
|
Partly Cloudy then Slight Chance Rain Showers
|
55°F |
5 to 10 mph
N
|
|
Monday
Jun 15
|
Slight Chance Rain Showers
|
74°F |
5 to 10 mph
NNW
|
|
Monday Night
Jun 15
|
Slight Chance Rain Showers
|
55°F |
5 to 10 mph
WNW
|
|
Tuesday
Jun 16
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
75°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 16
|
Chance Showers And Thunderstorms
|
56°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around St. Charles.
