August weather in Lemont, IL
The average temperature in Lemont in August is 75.1°F (63.4°F–86.7°F). Average precipitation: 4.46 inches.
August is a summer month in Lemont, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 23.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 41m. For travel, August is a comfortable month to visit.
Avg High
86.7°F
Avg Low
63.4°F
Precipitation
4.46 in
Daylight
13h 41m
August records in Lemont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 90.0°F (2015) | 59.0°F (2018) | 0.32 in (2000) |
| August 2 | 93.0°F (2016) | 57.0°F (2014) | 0.95 in (2003) |
| August 3 | 96.1°F (2014) | 60.1°F (2014) | 3.41 in (2001) |
| August 4 | 98.1°F (2016) | 53.1°F (2017) | 1.71 in (1998) |
| August 5 | 100.0°F (2018) | 53.1°F (2020) | 1.99 in (1998) |
| August 6 | 97.0°F (2018) | 59.0°F (2017) | 1.25 in (2007) |
| August 7 | 89.1°F (2014) | 57.9°F (2017) | 1.05 in (2000) |
| August 8 | 90.0°F (2018) | 52.0°F (2017) | 0.88 in (1998) |
| August 9 | 93.0°F (2016) | 60.1°F (2014) | 0.35 in (2011) |
| August 10 | 93.9°F (2016) | 59.0°F (2017) | 0.48 in (1993) |
| August 11 | 93.9°F (2016) | 63.0°F (2019) | 3.50 in (2014) |
| August 12 | 96.1°F (2018) | 57.9°F (2015) | 1.03 in (2014) |
| August 13 | 93.9°F (2018) | 55.9°F (2017) | 2.00 in (2016) |
| August 14 | 93.0°F (2018) | 55.9°F (2017) | 0.81 in (2010) |
| August 15 | 93.9°F (2019) | 50.0°F (2014) | 2.75 in (2023) |
| August 16 | 97.0°F (2015) | 53.1°F (2014) | 1.46 in (2024) |
| August 17 | 91.9°F (2016) | 62.1°F (2014) | 2.33 in (1997) |
| August 18 | 90.0°F (2015) | 63.0°F (2014) | 0.55 in (2015) |
| August 19 | 91.0°F (2014) | 57.9°F (2020) | 0.94 in (2025) |
| August 20 | 93.0°F (2018) | 57.9°F (2015) | 1.57 in (2007) |
| August 21 | 93.9°F (2014) | 55.0°F (2015) | 0.95 in (2014) |
| August 22 | 96.1°F (2013) | 54.0°F (2016) | 3.27 in (2014) |
| August 23 | 89.1°F (2014) | 54.0°F (2018) | 1.34 in (2007) |
| August 24 | 93.9°F (2020) | 50.0°F (2017) | 2.12 in (2007) |
| August 25 | 98.1°F (2014) | 52.0°F (2017) | 0.77 in (1998) |
| August 26 | 98.1°F (2020) | 52.0°F (2015) | 1.18 in (2001) |
| August 27 | 97.0°F (2018) | 51.1°F (2015) | 3.00 in (2012) |
| August 28 | 98.1°F (2020) | 54.0°F (2015) | 1.95 in (2004) |
| August 29 | 100.0°F (2020) | 57.0°F (2019) | 1.30 in (2018) |
| August 30 | 95.0°F (2014) | 59.0°F (2017) | 1.71 in (1993) |
| August 31 | 90.0°F (2014) | 55.0°F (2018) | 0.89 in (1993) |