Saint Charles County, MO Weather Forecast
County weather hub
Sunny
Compare major city weather across Saint Charles County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 81.
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
- Oct 8 to Oct 11, 2026
- Latest sync
- Oct 5, 2026 8:00 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Charles County
Sunday looks like the warmest upcoming period in Saint Charles County at 85 degrees F.
Thursday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Saturday at about 3 to 7 mph SE.
The forecast from Oct 8 through Oct 11 stays mostly dry.
Forecast Details
- Last updated
- Oct 5, 2026 8:00 AM CDT
- Coverage
- 4 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
Mostly clear, with a low around 57.
Sunny, with a high near 82.
Mostly clear, with a low around 57.
Sunny, with a high near 84.
Mostly clear, with a low around 61.
Sunny, with a high near 85.
Partly cloudy, with a low around 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 8
|
Sunny
|
81°F |
1 to 5 mph
NE
|
|
Thursday Night
Oct 8
|
Mostly Clear
|
57°F |
2 mph
E
|
|
Friday
Oct 9
|
Sunny
|
82°F |
5 mph
SE
|
|
Friday Night
Oct 9
|
Mostly Clear
|
57°F |
3 mph
SE
|
|
Saturday
Oct 10
|
Sunny
|
84°F |
3 to 7 mph
SE
|
|
Saturday Night
Oct 10
|
Mostly Clear
|
61°F |
6 mph
SE
|
|
Sunday
Oct 11
|
Sunny
|
85°F |
3 to 7 mph
SE
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
63°F |
2 to 6 mph
S
|
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.
