August weather in Riverwoods, IL
The average temperature in Riverwoods in August is 73.4°F (64.7°F–82.0°F). Average precipitation: 3.70 inches.
August is a summer month in Riverwoods, and is warmer than the annual average of 50.8°F. Daily temperatures swing about 17.3°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 43m. For travel, August is a comfortable month to visit.
Avg High
82.0°F
Avg Low
64.7°F
Precipitation
3.70 in
Daylight
13h 43m
August records in Riverwoods
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (2006) | 55.9°F (2019) | 0.37 in (2003) |
| August 2 | 98.1°F (2006) | 57.0°F (2009) | 0.98 in (2011) |
| August 3 | 93.9°F (2005) | 55.0°F (2000) | 1.33 in (2004) |
| August 4 | 98.1°F (2018) | 55.0°F (2017) | 2.13 in (2014) |
| August 5 | 95.0°F (2018) | 52.0°F (2020) | 1.45 in (2007) |
| August 6 | 95.0°F (2022) | 53.1°F (1997) | 0.46 in (2007) |
| August 7 | 96.1°F (2001) | 53.1°F (1997) | 1.67 in (2007) |
| August 8 | 95.0°F (2001) | 54.0°F (2017) | 0.44 in (2007) |
| August 9 | 96.1°F (2005) | 53.1°F (1999) | 1.17 in (2021) |
| August 10 | 93.9°F (2021) | 55.9°F (2008) | 0.57 in (2017) |
| August 11 | 95.0°F (2002) | 54.0°F (2004) | 0.90 in (2014) |
| August 12 | 90.0°F (2002) | 50.0°F (2004) | 0.55 in (2005) |
| August 13 | 91.9°F (2010) | 54.0°F (2004) | 0.84 in (2011) |
| August 14 | 91.0°F (2015) | 52.0°F (2004) | 0.61 in (2023) |
| August 15 | 91.9°F (2025) | 48.9°F (2004) | 0.78 in (2018) |
| August 16 | 93.9°F (2025) | 52.0°F (2004) | 0.61 in (2009) |
| August 17 | 89.1°F (2002) | 57.0°F (2012) | 0.97 in (2000) |
| August 18 | 88.0°F (2016) | 53.1°F (2012) | 1.65 in (2016) |
| August 19 | 89.1°F (2005) | 55.9°F (1997) | 2.00 in (2007) |
| August 20 | 93.0°F (2010) | 57.0°F (2001) | 1.17 in (2005) |
| August 21 | 96.1°F (2003) | 53.1°F (2012) | 1.27 in (2014) |
| August 22 | 90.0°F (1996) | 51.1°F (2004) | 1.34 in (2001) |
| August 23 | 99.0°F (2023) | 53.1°F (1997) | 1.97 in (2007) |
| August 24 | 100.0°F (2023) | 55.0°F (2009) | 1.85 in (2006) |
| August 25 | 96.1°F (2003) | 52.0°F (2017) | 1.18 in (2018) |
| August 26 | 96.1°F (2024) | 53.1°F (2025) | 1.73 in (2009) |
| August 27 | 98.1°F (2024) | 50.0°F (2015) | 1.91 in (2009) |
| August 28 | 93.9°F (2020) | 54.0°F (2015) | 1.93 in (2018) |
| August 29 | 93.9°F (2010) | 53.1°F (2025) | 0.71 in (2015) |
| August 30 | 96.1°F (2013) | 48.9°F (2009) | 0.44 in (2001) |
| August 31 | 93.9°F (2012) | 46.9°F (2009) | 0.17 in (2019) |