August weather in Wilmington, IL
The average temperature in Wilmington in August is 72.9°F (63.3°F–82.5°F). Average precipitation: 3.75 inches.
August is a summer month in Wilmington, and is warmer than the annual average of 51.1°F. Daily temperatures swing about 19.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 40m. For travel, August is a comfortable month to visit.
Avg High
82.5°F
Avg Low
63.3°F
Precipitation
3.75 in
Daylight
13h 40m
August records in Wilmington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (2006) | 50.0°F (1997) | 0.64 in (1965) |
| August 2 | 96.1°F (2006) | 55.9°F (2009) | 1.37 in (1961) |
| August 3 | 98.1°F (2011) | 55.9°F (2009) | 1.21 in (1943) |
| August 4 | 93.9°F (1997) | 55.9°F (2000) | 1.27 in (2004) |
| August 5 | 95.0°F (2002) | 55.0°F (1997) | 1.15 in (1977) |
| August 6 | 90.0°F (2001) | 46.9°F (1997) | 1.53 in (1951) |
| August 7 | 91.0°F (2007) | 46.9°F (1997) | 1.29 in (1986) |
| August 8 | 95.0°F (2012) | 53.1°F (1997) | 1.12 in (1977) |
| August 9 | 91.9°F (2001) | 55.0°F (1999) | 2.10 in (2011) |
| August 10 | 95.0°F (2001) | 55.9°F (1999) | 1.13 in (1977) |
| August 11 | 90.0°F (2002) | 55.0°F (2004) | 0.91 in (1997) |
| August 12 | 91.9°F (2002) | 48.0°F (2004) | 1.71 in (1949) |
| August 13 | 93.9°F (2010) | 50.0°F (2004) | 1.25 in (1990) |
| August 14 | 91.9°F (2010) | 50.0°F (2004) | 1.77 in (1952) |
| August 15 | 89.1°F (2003) | 45.0°F (2004) | 2.03 in (1985) |
| August 16 | 90.0°F (2003) | 46.9°F (2004) | 1.70 in (1993) |
| August 17 | 91.9°F (2003) | 50.0°F (2004) | 2.20 in (1987) |
| August 18 | 87.1°F (2002) | 52.0°F (2012) | 1.65 in (1979) |
| August 19 | 91.0°F (2011) | 52.0°F (2012) | 1.29 in (1965) |
| August 20 | 91.0°F (2005) | 54.0°F (2002) | 2.05 in (1979) |
| August 21 | 93.9°F (2010) | 52.0°F (1999) | 1.86 in (1958) |
| August 22 | 96.1°F (2003) | 51.1°F (2004) | 0.89 in (2007) |
| August 23 | 93.0°F (1998) | 51.1°F (1997) | 1.12 in (2007) |
| August 24 | 93.9°F (2012) | 52.0°F (1997) | 4.12 in (2007) |
| August 25 | 95.0°F (2012) | 55.0°F (2009) | 1.85 in (2004) |
| August 26 | 95.0°F (2003) | 55.9°F (1997) | 3.19 in (1972) |
| August 27 | 93.9°F (2003) | 55.0°F (2010) | 1.70 in (1983) |
| August 28 | 91.9°F (2003) | 57.9°F (2010) | 1.91 in (2004) |
| August 29 | 93.9°F (2003) | 55.9°F (1997) | 2.10 in (2006) |
| August 30 | 93.9°F (2010) | 51.1°F (2004) | 2.58 in (1955) |
| August 31 | 93.0°F (2012) | 46.9°F (2009) | 2.05 in (1980) |