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Hourly Forecast
Daylight Hours
06:49
Sunrise
19:03
Sunset
Moon
Waxing Crescent
11:34
Moonrise
20:43
Moonset
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Weather in Ballwin today, September 15, 2026
Ballwin stays under cloudy skies on September 15, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open.
Temperatures climb from an overnight low near 23°C toward a daytime high of about 37°C. The air stays humid, with relative humidity between 30% and 83% and the peak around 21:00. A lighter breeze peaks around 22:00 near 5.0 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 19:00. Outdoor plans may still want a flexible backup. Views remain open at about 16.1 km. Sunrise is at 06:49 and sunset at 19:03, giving 12 hours 14 minutes of sunlight today.
Overall, Ballwin on September 15, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 37°C.
Frequently asked questions about weather in Ballwin
How warm does it get in Ballwin?
The warmest month in Ballwin is July, with average high temperatures of 32°C. The average temperature during this period is around 26°C.
How cold does it get in Ballwin?
The coldest month in Ballwin is January, with average low temperatures of -3°C. The average temperature during this period is around 0°C.
What is the wettest time of year in Ballwin?
The wettest month in Ballwin is May, with an average of 131mm of precipitation.
What is the driest time of year in Ballwin?
The driest month in Ballwin is December, with an average of 59mm of precipitation.
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