August weather in Lerna, IL
The average temperature in Lerna in August is 73.9°F (63.5°F–84.2°F). Average precipitation: 2.42 inches.
August is a summer month in Lerna, and is warmer than the annual average of 53.4°F. Daily temperatures swing about 20.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 33m. For travel, August is a comfortable month to visit.
Avg High
84.2°F
Avg Low
63.5°F
Precipitation
2.42 in
Daylight
13h 33m
August records in Lerna
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.9°F (2006) | 55.0°F (2019) | 0.63 in (2020) |
| August 2 | 99.0°F (2012) | 55.0°F (2021) | 1.27 in (2017) |
| August 3 | 93.9°F (2010) | 37.0°F (2010) | 1.47 in (2022) |
| August 4 | 96.1°F (2010) | 36.0°F (2008) | 0.55 in (1998) |
| August 5 | 91.9°F (2002) | 50.0°F (2009) | 0.52 in (2008) |
| August 6 | 91.0°F (2006) | 15.3°F (2009) | 0.86 in (2015) |
| August 7 | 95.0°F (2007) | 51.1°F (2004) | 0.33 in (2014) |
| August 8 | 96.1°F (2012) | 34.0°F (2006) | 0.48 in (2012) |
| August 9 | 93.9°F (2005) | 20.1°F (2007) | 0.63 in (2021) |
| August 10 | 96.1°F (2010) | 55.0°F (2024) | 0.92 in (2006) |
| August 11 | 96.1°F (2010) | 0.1°F (2007) | 0.36 in (2023) |
| August 12 | 98.1°F (2007) | -0.8°F (2009) | 1.37 in (2019) |
| August 13 | 95.0°F (2010) | 0.1°F (2007) | 1.51 in (1999) |
| August 14 | 93.0°F (2010) | 48.9°F (2001) | 0.57 in (2023) |
| August 15 | 96.1°F (2007) | 46.9°F (2011) | 2.67 in (2016) |
| August 16 | 93.9°F (2025) | 31.1°F (2011) | 1.29 in (2012) |
| August 17 | 93.9°F (2000) | 36.0°F (2008) | 0.77 in (2000) |
| August 18 | 91.9°F (2025) | 51.1°F (2007) | 0.72 in (2001) |
| August 19 | 91.9°F (2025) | 53.1°F (2020) | 1.08 in (2002) |
| August 20 | 91.0°F (2010) | 53.1°F (2012) | 1.02 in (2004) |
| August 21 | 95.0°F (2003) | 50.0°F (2024) | 1.16 in (2017) |
| August 22 | 95.0°F (2007) | 50.0°F (2024) | 1.37 in (2019) |
| August 23 | 97.0°F (2007) | -0.8°F (2008) | 1.08 in (2000) |
| August 24 | 99.0°F (2023) | 53.1°F (2015) | 1.07 in (2007) |
| August 25 | 99.0°F (2023) | 52.0°F (2025) | 0.77 in (2023) |
| August 26 | 95.0°F (2003) | 50.0°F (2025) | 2.11 in (2000) |
| August 27 | 95.0°F (2003) | 50.0°F (2025) | 0.65 in (2004) |
| August 28 | 93.9°F (2007) | 55.0°F (2007) | 0.90 in (2009) |
| August 29 | 97.0°F (2007) | 0.1°F (2007) | 1.12 in (2022) |
| August 30 | 95.0°F (2013) | 48.0°F (2009) | 0.99 in (2021) |
| August 31 | 95.0°F (2013) | 48.0°F (2023) | 0.50 in (2024) |