Saint Clair, MO Weather Forecast
Local 7-day forecast
Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Clair, MO in one place.
Clear, with a low around 64. Northwest wind around 1 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: Jul 14, 2026 5:20 AM CDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Saint Clair, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 5:20 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Clair
Saturday looks like the warmest upcoming period in Saint Clair at 91 degrees F.
Overnight is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Saturday at about 3 to 8 mph W.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 5:20 AM 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
Sunny, with a high near 88. Northeast wind 0 to 6 mph.
Mostly clear, with a low around 68. Northeast wind 0 to 3 mph.
A slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 88. Northeast wind 0 to 3 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 69. East wind around 2 mph. Chance of precipitation is 20%.
Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7am and 1pm. Sunny, with a high near 91. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 73. Chance of precipitation is 20%.
Sunny, with a high near 91.
Mostly clear, with a low around 71.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 14
|
Clear
|
64°F |
1 mph
NW
|
|
Tuesday
Jul 14
|
Sunny
|
88°F |
0 to 6 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
68°F |
0 to 3 mph
NE
|
|
Wednesday
Jul 15
|
Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
0 to 3 mph
NE
|
|
Wednesday Night
Jul 15
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
69°F |
2 mph
E
|
|
Thursday
Jul 16
|
Mostly Sunny then Showers And Thunderstorms Likely
|
88°F |
1 mph
S
|
|
Thursday Night
Jul 16
|
Showers And Thunderstorms Likely then Partly Cloudy
|
70°F |
2 mph
W
|
|
Friday
Jul 17
|
Slight Chance Showers And Thunderstorms
|
89°F |
2 to 6 mph
W
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
71°F |
0 to 3 mph
SW
|
|
Saturday
Jul 18
|
Slight Chance Showers And Thunderstorms
|
91°F |
3 to 8 mph
W
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
73°F |
5 mph
SW
|
|
Sunday
Jul 19
|
Sunny
|
91°F |
6 mph
W
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
71°F |
1 to 5 mph
SW
|
|
Monday
Jul 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
2 to 6 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Clair.
