Saint Clair, MO Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Clair, MO in one place.
Mostly sunny, with a high near 87. South wind around 3 mph.
Local Weather Overview
This forecast page for Saint Clair, 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: Aug 27, 2026 11:46 AM CDT.
The active forecast window currently covers Aug 29 to Sep 2, 2026 for Saint Clair, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 2, 2026
- Latest sync
- Aug 27, 2026 11:46 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Clair
Wednesday looks like the warmest upcoming period in Saint Clair at 95 degrees F.
Saturday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Sunday at about 7 mph S.
The forecast from Aug 29 through Sep 2 stays mostly dry.
Forecast Details
- Last updated
- Aug 27, 2026 11:46 AM CDT
- Coverage
- 5 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 66.
Sunny, with a high near 93.
Mostly clear, with a low around 71.
Sunny, with a high near 94.
Mostly clear, with a low around 73.
Sunny, with a high near 94.
Mostly clear, with a low around 74.
Sunny, with a high near 95.
Mostly clear, with a low around 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Mostly Sunny
|
87°F |
3 mph
S
|
|
Saturday Night
Aug 29
|
Mostly Clear
|
66°F |
5 mph
S
|
|
Sunday
Aug 30
|
Sunny
|
93°F |
7 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
71°F |
5 mph
S
|
|
Monday
Aug 31
|
Sunny
|
94°F |
6 mph
S
|
|
Monday Night
Aug 31
|
Mostly Clear
|
73°F |
5 mph
S
|
|
Tuesday
Sep 1
|
Sunny
|
94°F |
3 mph
SW
|
|
Tuesday Night
Sep 1
|
Mostly Clear
|
74°F |
3 mph
S
|
|
Wednesday
Sep 2
|
Sunny
|
95°F |
3 mph
SW
|
|
Wednesday Night
Sep 2
|
Mostly Clear
|
73°F |
2 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Clair.
