Ballwin climate

Ballwin Weather in August

NOAA 1991-2020 normals for St Charles 7 Ssw, 10.2 km from Ballwin

Average highs run from 89°F on August 1 to 85°F on August 31, and lows from 69°F to 64°F. Normal precipitation for the month is 3.54 in over about 7 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Ballwin, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
67°F
Precipitation
3.54 in
Record high
106°FAug 15, 2007
Record low
46°FAug 13, 2004
Chance of a freeze
0%
Days of 90°F or more
11.6
Daylight
14 h 09 min to 13 h 03 min
Cloud cover
48%
Humidity
69%
Dew point
65°F
Wind
4.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 189°F69°F102°F 200655°F 199224%0%
Aug 289°F69°F103°F 200657°F 199223%0%
Aug 389°F69°F101°F 201055°F 202523%0%
Aug 489°F69°F100°F 201057°F 199224%0%
Aug 589°F69°F98°F 200253°F 201723%0%
Aug 689°F69°F101°F 200749°F 199423%0%
Aug 788°F69°F101°F 200753°F 199023%0%
Aug 888°F69°F101°F 198852°F 198923%0%
Aug 988°F68°F101°F 200652°F 198923%0%
Aug 1088°F68°F100°F 201052°F 202423%0%
Aug 1188°F68°F99°F 200750°F 200423%0%
Aug 1288°F68°F105°F 200748°F 200423%0%
Aug 1388°F68°F99°F 201046°F 200423%0%
Aug 1488°F68°F104°F 200748°F 200423%0%
Aug 1588°F68°F106°F 200749°F 200423%0%
Aug 1688°F67°F101°F 198849°F 200423%0%
Aug 1788°F67°F102°F 198851°F 199223%0%
Aug 1888°F67°F101°F 198851°F 201223%0%
Aug 1987°F67°F97°F 199556°F 200823%0%
Aug 2087°F67°F100°F 202352°F 201223%0%
Aug 2187°F67°F103°F 200352°F 199223%0%
Aug 2287°F66°F98°F 202348°F 202422%0%
Aug 2387°F66°F98°F 200751°F 202422%0%
Aug 2487°F66°F98°F 202152°F 201522%0%
Aug 2587°F66°F101°F 202350°F 202522%0%
Aug 2686°F65°F100°F 200348°F 202522%0%
Aug 2786°F65°F99°F 202447°F 202522%0%
Aug 2886°F65°F100°F 199051°F 199222%0%
Aug 2986°F65°F98°F 200749°F 198822%0%
Aug 3086°F64°F100°F 201348°F 198822%0%
Aug 3185°F64°F101°F 201350°F 198822%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Ballwin, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:04 AM, sunset 8:13 PM
August 31
sunrise 6:31 AM, sunset 7:34 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00237398 (St Charles 7 Ssw), public domain. Records: NOAA GHCN-Daily, station USW00003966, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.