Saint Louis County, MO Weather Forecast
County weather hub
Sunny
Compare major city weather across Saint Louis County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 83. Northwest wind 3 to 7 mph.
County Weather Overview
This county weather page brings together forecast coverage for Saint Louis County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 62 of 62 mapped cities in Saint Louis County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 23 to Aug 28, 2026
- Latest sync
- Aug 22, 2026 8:55 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Louis County
Friday looks like the warmest upcoming period in Saint Louis County at 88 degrees F.
Sunday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Sunday at about 3 to 7 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 22, 2026 8:55 AM 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
Partly cloudy, with a low around 64. Northeast wind 1 to 6 mph.
Mostly sunny, with a high near 81. Southeast wind 2 to 6 mph.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 87.
Partly cloudy, with a low around 68.
Sunny, with a high near 87.
Mostly clear, with a low around 68.
Sunny, with a high near 88.
Partly cloudy, with a low around 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Aug 23
|
Sunny
|
83°F |
3 to 7 mph
NW
|
|
Sunday Night
Aug 23
|
Partly Cloudy
|
64°F |
1 to 6 mph
NE
|
|
Monday
Aug 24
|
Mostly Sunny
|
81°F |
2 to 6 mph
SE
|
|
Monday Night
Aug 24
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
66°F |
7 mph
E
|
|
Tuesday
Aug 25
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
84°F |
6 mph
SE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
68°F |
5 mph
SE
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
87°F |
3 mph
SW
|
|
Wednesday Night
Aug 26
|
Partly Cloudy
|
68°F |
2 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
87°F |
5 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
68°F |
3 mph
NE
|
|
Friday
Aug 28
|
Sunny
|
88°F |
1 to 5 mph
NE
|
|
Friday Night
Aug 28
|
Partly Cloudy
|
70°F |
5 mph
E
|
Major City Forecasts
Live forecast snapshots for major cities across Saint Louis County.
Coverage
Forecast coverage currently spans 62 of 62 mapped cities in Saint Louis County.
Largest mapped city population in this region: 90,070.
