August weather in Wheaton, MO
The average temperature in Wheaton in August is 77.3°F (66.2°F–88.4°F). Average precipitation: 3.14 inches.
August is a summer month in Wheaton, and is warmer than the annual average of 56.8°F. Daily temperatures swing about 22.2°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 24m. For travel, August is hot.
Avg High
88.4°F
Avg Low
66.2°F
Precipitation
3.14 in
Daylight
13h 24m
August records in Wheaton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.9°F (1980) | 55.0°F (1992) | 1.64 in (1974) |
| August 2 | 104.0°F (2011) | 52.0°F (1973) | 1.44 in (1986) |
| August 3 | 106.0°F (2011) | 52.0°F (1976) | 1.52 in (2013) |
| August 4 | 105.1°F (2011) | 52.0°F (1974) | 0.73 in (1985) |
| August 5 | 102.9°F (2012) | 55.0°F (1974) | 1.78 in (1993) |
| August 6 | 102.0°F (2011) | 55.0°F (1990) | 2.51 in (1984) |
| August 7 | 102.9°F (2011) | 53.1°F (1997) | 2.13 in (1982) |
| August 8 | 102.9°F (2011) | 55.0°F (1990) | 2.02 in (2008) |
| August 9 | 102.9°F (1980) | 57.0°F (1998) | 1.91 in (1974) |
| August 10 | 100.9°F (1980) | 55.9°F (2024) | 1.51 in (2008) |
| August 11 | 98.1°F (2007) | 57.0°F (2024) | 0.75 in (1982) |
| August 12 | 102.0°F (1999) | 48.9°F (2004) | 1.71 in (1997) |
| August 13 | 102.0°F (1999) | 48.0°F (2004) | 2.12 in (1982) |
| August 14 | 100.0°F (2007) | 51.1°F (2004) | 4.05 in (2023) |
| August 15 | 100.9°F (2007) | 51.1°F (2004) | 1.81 in (1990) |
| August 16 | 100.9°F (2007) | 48.0°F (1992) | 1.55 in (1977) |
| August 17 | 98.1°F (2007) | 53.1°F (1992) | 1.29 in (1985) |
| August 18 | 100.0°F (1984) | 55.0°F (1992) | 0.51 in (2011) |
| August 19 | 100.0°F (2025) | 54.0°F (1981) | 4.91 in (2015) |
| August 20 | 99.0°F (1980) | 52.0°F (2015) | 4.73 in (2009) |
| August 21 | 99.0°F (2023) | 53.1°F (1992) | 0.89 in (2022) |
| August 22 | 100.0°F (1983) | 53.1°F (2009) | 2.71 in (2008) |
| August 23 | 100.0°F (2003) | 55.0°F (1999) | 1.55 in (1999) |
| August 24 | 98.1°F (2003) | 55.0°F (1984) | 1.01 in (2008) |
| August 25 | 98.1°F (1978) | 54.0°F (1985) | 0.92 in (1982) |
| August 26 | 99.0°F (1980) | 52.0°F (1985) | 0.97 in (1987) |
| August 27 | 100.0°F (1995) | 52.0°F (1992) | 2.35 in (1982) |
| August 28 | 100.9°F (2000) | 48.0°F (1992) | 2.25 in (2006) |
| August 29 | 102.0°F (1984) | 46.9°F (1986) | 0.85 in (2004) |
| August 30 | 100.0°F (1990) | 51.1°F (1986) | 2.00 in (1994) |
| August 31 | 102.9°F (1984) | 46.0°F (2009) | 1.15 in (2018) |