Saint Charles, MO Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Charles, MO in one place.
Rain showers likely before 1pm, then showers and thunderstorms likely. Cloudy. High near 70, with temperatures falling to around 66 in the afternoon. West wind around 9 mph. Chance of precipitation is 70%.
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: Apr 9, 2026 12:43 PM CDT.
The active forecast window currently covers Apr 10 to Apr 15, 2026 for Saint Charles, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 12:43 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Charles
Monday looks like the warmest upcoming period in Saint Charles at 85 degrees F.
Friday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Sunday at about 8 to 17 mph S.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 12:43 PM 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. Mostly cloudy, with a low around 52. Northeast wind 3 to 7 mph. Chance of precipitation is 40%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 76. Southeast wind around 8 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 50%.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Rain Showers Likely
|
70°F |
9 mph
W
|
|
Friday Night
Apr 10
|
Chance Showers And Thunderstorms
|
52°F |
3 to 7 mph
NE
|
|
Saturday
Apr 11
|
Chance Rain Showers
|
76°F |
8 mph
SE
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
63°F |
8 mph
SE
|
|
Sunday
Apr 12
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
80°F |
8 to 17 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
66°F |
15 mph
S
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
85°F |
13 to 16 mph
SW
|
|
Monday Night
Apr 13
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
68°F |
14 mph
S
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
83°F |
12 to 15 mph
SW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
62°F |
13 mph
SW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
76°F |
10 to 14 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
55°F |
7 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Charles.
