August weather in De Soto, IL
The average temperature in De Soto in August is 76.0°F (64.8°F–87.2°F). Average precipitation: 3.05 inches.
August is a summer month in De Soto, and is warmer than the annual average of 56.4°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 28m. For travel, August is a comfortable month to visit.
Avg High
87.2°F
Avg Low
64.8°F
Precipitation
3.05 in
Daylight
13h 28m
August records in De Soto
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (2012) | 59.0°F (2014) | 0.63 in (2016) |
| August 2 | 98.1°F (2002) | 57.0°F (2021) | 0.44 in (2022) |
| August 3 | 102.9°F (2010) | 55.0°F (2025) | 1.37 in (2023) |
| August 4 | 104.0°F (2010) | 54.0°F (2021) | 3.29 in (2012) |
| August 5 | 100.9°F (2002) | 50.0°F (2017) | 0.72 in (2015) |
| August 6 | 96.1°F (2007) | 55.9°F (1999) | 1.23 in (2017) |
| August 7 | 97.0°F (2007) | 53.1°F (2004) | 2.54 in (2000) |
| August 8 | 99.0°F (2007) | 54.0°F (2002) | 1.28 in (2014) |
| August 9 | 100.9°F (2007) | 54.0°F (2002) | 0.68 in (2013) |
| August 10 | 100.0°F (2010) | 55.9°F (2024) | 1.82 in (2001) |
| August 11 | 100.9°F (2010) | 55.0°F (2012) | 1.35 in (2001) |
| August 12 | 100.9°F (2010) | 52.0°F (2004) | 0.83 in (2023) |
| August 13 | 99.0°F (2010) | 48.9°F (2004) | 0.90 in (2011) |
| August 14 | 98.1°F (2007) | 48.0°F (2004) | 1.93 in (2016) |
| August 15 | 102.0°F (2007) | 51.1°F (1999) | 1.02 in (2016) |
| August 16 | 102.9°F (2007) | 48.9°F (2004) | 1.02 in (2007) |
| August 17 | 100.0°F (2003) | 54.0°F (2008) | 0.66 in (2018) |
| August 18 | 96.1°F (2006) | 52.0°F (2012) | 1.02 in (2011) |
| August 19 | 98.1°F (2025) | 52.0°F (2008) | 0.41 in (2009) |
| August 20 | 95.0°F (2010) | 54.0°F (2012) | 0.71 in (2000) |
| August 21 | 95.0°F (2003) | 51.1°F (1999) | 1.87 in (2010) |
| August 22 | 97.0°F (2003) | 46.9°F (2024) | 1.87 in (2008) |
| August 23 | 98.1°F (2007) | 51.1°F (2018) | 0.23 in (2002) |
| August 24 | 98.1°F (2007) | 52.0°F (2017) | 1.03 in (2001) |
| August 25 | 99.0°F (2023) | 48.9°F (2025) | 0.50 in (2000) |
| August 26 | 96.1°F (2003) | 45.0°F (2025) | 1.50 in (2016) |
| August 27 | 98.1°F (2024) | 46.0°F (2025) | 1.91 in (2023) |
| August 28 | 99.0°F (2007) | 51.1°F (2025) | 0.93 in (2004) |
| August 29 | 98.1°F (2024) | 52.0°F (2025) | 0.44 in (2003) |
| August 30 | 96.1°F (2012) | 53.1°F (1999) | 0.92 in (2003) |
| August 31 | 93.9°F (2013) | 48.9°F (1999) | 2.02 in (2012) |