Saint Louis County, MO Weather Forecast
County weather hub
Mostly Sunny then Chance Showers And Thunderstorms
Compare major city weather across Saint Louis County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 94. Heat index values as high as 101. Southwest wind around 6 mph. Chance of precipitation is 50%.
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
- Jul 9 to Jul 15, 2026
- Latest sync
- Jul 8, 2026 11:14 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Louis County
Thursday looks like the warmest upcoming period in Saint Louis County at 94 degrees F.
Saturday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Monday at about 2 to 8 mph NE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 11:14 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
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Heat index values as high as 100. Southwest wind around 6 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 89. Southwest wind around 5 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 72. South wind around 5 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 50%.
A slight chance of rain showers before 1pm, then 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 70. Chance of precipitation is 20%.
Sunny, with a high near 89.
Mostly clear, with a low around 71.
Sunny, with a high near 91.
Clear, with a low around 73.
Sunny, with a high near 92.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Mostly Sunny then Chance Showers And Thunderstorms
|
94°F |
6 mph
SW
|
|
Thursday Night
Jul 9
|
Chance Showers And Thunderstorms
|
74°F |
6 mph
SW
|
|
Friday
Jul 10
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
89°F |
5 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms Likely
|
72°F |
5 mph
S
|
|
Saturday
Jul 11
|
Showers And Thunderstorms Likely
|
87°F |
6 mph
NW
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
70°F |
5 mph
NE
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
87°F |
3 to 7 mph
NE
|
|
Sunday Night
Jul 12
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
70°F |
2 to 7 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
89°F |
2 to 8 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
71°F |
1 to 8 mph
E
|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
2 to 6 mph
E
|
|
Tuesday Night
Jul 14
|
Clear
|
73°F |
1 to 5 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
2 to 6 mph
N
|
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.
