Ballwin, MO Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Ballwin, MO in one place.
Mostly clear, with a low around 72. Southeast wind around 2 mph.
Local Weather Overview
This forecast page for Ballwin, 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 9, 2026 6:11 AM CDT.
The active forecast window currently covers Jul 9 to Jul 15, 2026 for Ballwin, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 15, 2026
- Latest sync
- Jul 9, 2026 6:11 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ballwin
Thursday looks like the warmest upcoming period in Ballwin at 92 degrees F.
Saturday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Thursday at about 2 to 7 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 6:11 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
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 2 to 7 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 3 to 7 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly sunny, with a high near 88. West wind 3 to 7 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 60%.
Rain showers likely before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 60%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 40%.
A slight chance of rain showers. Sunny, with a high near 87. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 69. Chance of precipitation is 20%.
Sunny, with a high near 89.
Mostly clear, with a low around 70.
Sunny, with a high near 91.
Mostly clear, with a low around 72.
Sunny, with a high near 92.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 9
|
Mostly Clear
|
72°F |
2 mph
SE
|
|
Thursday
Jul 9
|
Partly Sunny then Chance Showers And Thunderstorms
|
92°F |
2 to 7 mph
SW
|
|
Thursday Night
Jul 9
|
Chance Showers And Thunderstorms
|
73°F |
3 to 7 mph
SW
|
|
Friday
Jul 10
|
Chance Showers And Thunderstorms
|
88°F |
3 to 7 mph
W
|
|
Friday Night
Jul 10
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
71°F |
5 mph
SW
|
|
Saturday
Jul 11
|
Rain Showers Likely
|
86°F |
6 mph
NW
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
69°F |
2 to 6 mph
NE
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers
|
87°F |
6 mph
NE
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers then Mostly Clear
|
69°F |
1 to 6 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
89°F |
2 to 7 mph
NE
|
|
Monday Night
Jul 13
|
Mostly Clear
|
70°F |
1 to 7 mph
E
|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
1 to 5 mph
NE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
72°F |
3 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
92°F |
3 mph
SW
|
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