Saint Charles, MO Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Charles, MO in one place.
Sunny, with a high near 90. Southeast wind 5 to 8 mph.
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: Oct 8, 2026 12:13 PM CDT.
The active forecast window currently covers Oct 9 to Oct 14, 2026 for Saint Charles, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 9 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 12:13 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Charles
Columbus Day looks like the warmest upcoming period in Saint Charles at 91 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Tuesday at about 8 to 12 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 12:13 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
Mostly clear, with a low around 63. Southeast wind around 7 mph.
Mostly sunny, with a high near 85. Southeast wind 5 to 10 mph.
A chance of rain showers after 7pm. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
A chance of rain showers before 7am. Mostly sunny, with a high near 80. Chance of precipitation is 50%.
Mostly clear, with a low around 61.
Sunny, with a high near 91.
Mostly clear, with a low around 63.
A slight chance of rain showers after 7am. Sunny, with a high near 79. Chance of precipitation is 20%.
A slight chance of rain showers before 1am. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Sunny, with a high near 76.
A chance of rain showers after 7pm. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 9
|
Sunny
|
90°F |
5 to 8 mph
SE
|
|
Friday Night
Oct 9
|
Mostly Clear
|
63°F |
7 mph
SE
|
|
Saturday
Oct 10
|
Mostly Sunny
|
85°F |
5 to 10 mph
SE
|
|
Saturday Night
Oct 10
|
Chance Rain Showers
|
61°F |
9 mph
E
|
|
Sunday
Oct 11
|
Chance Rain Showers then Mostly Sunny
|
80°F |
7 mph
N
|
|
Sunday Night
Oct 11
|
Mostly Clear
|
61°F |
2 mph
S
|
|
Columbus Day
Oct 12
|
Sunny
|
91°F |
3 to 8 mph
SW
|
|
Monday Night
Oct 12
|
Mostly Clear
|
63°F |
7 to 10 mph
SW
|
|
Tuesday
Oct 13
|
Slight Chance Rain Showers
|
79°F |
8 to 12 mph
NW
|
|
Tuesday Night
Oct 13
|
Slight Chance Rain Showers
|
55°F |
5 to 8 mph
N
|
|
Wednesday
Oct 14
|
Sunny
|
76°F |
6 mph
E
|
|
Wednesday Night
Oct 14
|
Chance Rain Showers
|
58°F |
7 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Charles.
