Saint Charles County, MO Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Saint Charles County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers likely before 10am, then showers and thunderstorms likely. Cloudy, with a high near 68. Northwest wind around 9 mph. Chance of precipitation is 70%.
County Weather Overview
This county weather page brings together forecast coverage for Saint Charles County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 9 of 9 mapped cities in Saint Charles County.
Page Snapshot
- Page focus
- county 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 County
Monday looks like the warmest upcoming period in Saint Charles County at 84 degrees F.
Friday Night is the coolest period ahead with temperatures near 51 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 rain showers. Mostly cloudy, with a low around 51. 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 7 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 60. 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 53. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Showers And Thunderstorms Likely
|
68°F |
9 mph
NW
|
|
Friday Night
Apr 10
|
Chance Rain Showers
|
51°F |
3 to 7 mph
NE
|
|
Saturday
Apr 11
|
Chance Rain Showers
|
76°F |
7 mph
SE
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
61°F |
8 mph
SE
|
|
Sunday
Apr 12
|
Chance Showers And Thunderstorms
|
79°F |
8 to 17 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
65°F |
16 mph
S
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
84°F |
14 to 17 mph
SW
|
|
Monday Night
Apr 13
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
67°F |
15 mph
S
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
82°F |
13 to 16 mph
SW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely
|
60°F |
13 mph
SW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
76°F |
13 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
53°F |
6 to 10 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Saint Charles County.
Coverage
Forecast coverage currently spans 9 of 9 mapped cities in Saint Charles County.
Largest mapped city population in this region: 89,769.
