Lake Saint Louis, MO Weather Forecast
Local 7-day forecast
Scattered Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Lake Saint Louis, MO in one place.
Scattered showers and thunderstorms. Cloudy, with a high near 85. North wind around 3 mph. Chance of precipitation is 30%.
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: Jul 9, 2026 6:07 PM CDT.
The active forecast window currently covers Jul 9 to Jul 15, 2026 for Lake Saint Louis, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 15, 2026
- Latest sync
- Jul 9, 2026 6:07 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake Saint Louis
Wednesday looks like the warmest upcoming period in Lake Saint Louis at 92 degrees F.
Saturday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Sunday at about 2 to 7 mph NE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 6:07 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
Scattered showers and thunderstorms. Mostly cloudy, with a low around 72. South wind around 3 mph. Chance of precipitation is 50%.
Scattered showers and thunderstorms. Partly sunny, with a high near 89. West wind around 3 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Northeast wind 0 to 3 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Northeast wind around 3 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 68. Chance of precipitation is 20%.
Sunny, with a high near 89.
Mostly clear, with a low around 69.
Sunny, with a high near 91.
Mostly clear, with a low around 71.
Sunny, with a high near 92.
Mostly clear, with a low around 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 9
|
Scattered Showers And Thunderstorms
|
85°F |
3 mph
N
|
|
Tonight
Jul 9
|
Scattered Showers And Thunderstorms
|
72°F |
3 mph
S
|
|
Friday
Jul 10
|
Scattered Showers And Thunderstorms
|
89°F |
3 mph
W
|
|
Friday Night
Jul 10
|
Chance Showers And Thunderstorms
|
70°F |
0 to 3 mph
NE
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
86°F |
3 mph
NE
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
68°F |
1 to 5 mph
NE
|
|
Sunday
Jul 12
|
Slight Chance Showers And Thunderstorms
|
87°F |
2 to 7 mph
NE
|
|
Sunday Night
Jul 12
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
68°F |
1 to 7 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
89°F |
2 to 7 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
69°F |
0 to 7 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
1 to 6 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
71°F |
0 to 5 mph
E
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
0 to 3 mph
SE
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
72°F |
2 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lake Saint Louis.