Lake Saint Louis, MO Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Lake Saint Louis, MO in one place.
Patchy fog before 8am. Sunny, with a high near 82. East wind 0 to 3 mph.
Local Weather Overview
This forecast page for Lake Saint Louis, 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 7, 2026 9:53 PM CDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Lake Saint Louis, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 7, 2026 9:53 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake Saint Louis
Columbus Day looks like the warmest upcoming period in Lake Saint Louis at 91 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Saturday at about 3 to 10 mph SE.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 7, 2026 9:53 PM CDT
- Coverage
- 7 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 60. Southeast wind around 3 mph.
Sunny, with a high near 89. South wind 3 to 7 mph.
Clear, with a low around 63. South wind around 6 mph.
Mostly sunny, with a high near 88.
A slight chance of rain between 7pm and 1am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
Mostly sunny, with a high near 82.
Partly cloudy, with a low around 61.
Sunny, with a high near 91.
Mostly clear, with a low around 57.
A slight chance of rain showers between 7am and 1pm. Sunny, with a high near 74. Chance of precipitation is 20%.
Partly cloudy, with a low around 51.
A chance of rain showers after 7am. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 8
|
Patchy Fog then Sunny
|
82°F |
0 to 3 mph
E
|
|
Thursday Night
Oct 8
|
Mostly Clear
|
60°F |
3 mph
SE
|
|
Friday
Oct 9
|
Sunny
|
89°F |
3 to 7 mph
S
|
|
Friday Night
Oct 9
|
Clear
|
63°F |
6 mph
S
|
|
Saturday
Oct 10
|
Mostly Sunny
|
88°F |
3 to 10 mph
SE
|
|
Saturday Night
Oct 10
|
Slight Chance Light Rain
|
57°F |
3 to 8 mph
SE
|
|
Sunday
Oct 11
|
Mostly Sunny
|
82°F |
6 mph
N
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
61°F |
2 mph
S
|
|
Columbus Day
Oct 12
|
Sunny
|
91°F |
3 to 9 mph
SW
|
|
Monday Night
Oct 12
|
Mostly Clear
|
57°F |
5 to 10 mph
SW
|
|
Tuesday
Oct 13
|
Slight Chance Rain Showers
|
74°F |
10 mph
NW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy
|
51°F |
5 to 8 mph
N
|
|
Wednesday
Oct 14
|
Chance Rain Showers
|
73°F |
8 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lake Saint Louis.