Saint Louis County, MO Weather Forecast
County weather hub
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 chance of showers and thunderstorms after 7am. Partly sunny, with a high near 82. Chance of precipitation is 30%.
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
- May 25 to May 28, 2026
- Latest sync
- May 21, 2026 8:06 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 86 degrees F.
Monday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Tuesday at about 3 to 8 mph E.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- May 21, 2026 8:06 PM CDT
- Coverage
- 4 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 64. Chance of precipitation is 30%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67. Chance of precipitation is 50%.
A chance of showers and thunderstorms after 7am. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Chance Showers And Thunderstorms
|
82°F |
1 to 6 mph
E
|
|
Monday Night
May 25
|
Chance Showers And Thunderstorms
|
64°F |
5 mph
E
|
|
Tuesday
May 26
|
Chance Showers And Thunderstorms
|
83°F |
3 to 8 mph
E
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms
|
66°F |
7 mph
SE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms
|
85°F |
5 to 8 mph
SE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms
|
67°F |
3 to 7 mph
SE
|
|
Thursday
May 28
|
Chance Showers And Thunderstorms
|
86°F |
3 to 7 mph
SE
|
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.
