Saint Charles, MO Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Charles, MO in one place.
Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms between 8am and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Northwest wind 1 to 5 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Saint Charles, MO 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 10, 2026 8:15 AM CDT.
The active forecast window currently covers Jul 11 to Jul 16, 2026 for Saint Charles, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 11 to Jul 16, 2026
- Latest sync
- Jul 10, 2026 8:15 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Charles
Wednesday looks like the warmest upcoming period in Saint Charles at 92 degrees F.
Sunday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Sunday at about 3 to 8 mph NE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 8:15 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. Partly cloudy, with a low around 70. Northeast wind 2 to 6 mph. Chance of precipitation is 30%.
A chance of rain showers. Sunny, with a high near 87. Northeast wind 3 to 8 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 69. Chance of precipitation is 20%.
Sunny, with a high near 89.
Mostly clear, with a low around 70.
Sunny, with a high near 91.
Mostly clear, with a low around 72.
Sunny, with a high near 92.
Mostly clear, with a low around 74.
Sunny, with a high near 92.
Mostly clear, with a low around 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 11
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
86°F |
1 to 5 mph
NW
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
70°F |
2 to 6 mph
NE
|
|
Sunday
Jul 12
|
Chance Rain Showers
|
87°F |
3 to 8 mph
NE
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers then Mostly Clear
|
69°F |
2 to 8 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
89°F |
2 to 8 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
70°F |
0 to 8 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
0 to 7 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
72°F |
0 to 6 mph
E
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
1 to 5 mph
N
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
74°F |
3 mph
S
|
|
Thursday
Jul 16
|
Sunny
|
92°F |
2 to 6 mph
SW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
75°F |
6 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Charles.
