August weather in Cortland, IL
The average temperature in Cortland in August is 71.3°F (61.3°F–81.2°F). Average precipitation: 4.06 inches.
August is a summer month in Cortland, and is warmer than the annual average of 48.5°F. Daily temperatures swing about 19.9°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 42m. For travel, August is a comfortable month to visit.
Avg High
81.2°F
Avg Low
61.3°F
Precipitation
4.06 in
Daylight
13h 42m
August records in Cortland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 97.0°F (2006) | 48.0°F (1990) | 0.61 in (2003) |
| August 2 | 98.1°F (1988) | 48.0°F (1976) | 2.15 in (1966) |
| August 3 | 99.0°F (1988) | 46.0°F (1976) | 1.12 in (2010) |
| August 4 | 97.0°F (1988) | 46.0°F (1972) | 2.67 in (1989) |
| August 5 | 98.1°F (1988) | 46.9°F (1974) | 2.01 in (2002) |
| August 6 | 93.0°F (1984) | 46.9°F (1994) | 4.68 in (1996) |
| August 7 | 93.0°F (1983) | 46.0°F (1990) | 1.51 in (2007) |
| August 8 | 96.1°F (1983) | 46.0°F (1976) | 2.33 in (1977) |
| August 9 | 98.1°F (1988) | 46.9°F (1972) | 3.05 in (1988) |
| August 10 | 96.1°F (2005) | 50.0°F (1972) | 2.57 in (1979) |
| August 11 | 91.9°F (1983) | 46.0°F (1967) | 2.21 in (1994) |
| August 12 | 95.0°F (1995) | 46.0°F (1967) | 1.35 in (2005) |
| August 13 | 97.0°F (1995) | 48.0°F (2004) | 1.49 in (1985) |
| August 14 | 95.0°F (1995) | 50.0°F (1992) | 5.71 in (1987) |
| August 15 | 93.9°F (1995) | 45.0°F (1979) | 1.81 in (2023) |
| August 16 | 99.0°F (1988) | 42.1°F (1992) | 2.55 in (1995) |
| August 17 | 102.9°F (1988) | 44.1°F (1992) | 2.16 in (1968) |
| August 18 | 102.0°F (1988) | 46.9°F (1981) | 1.29 in (1979) |
| August 19 | 98.1°F (1983) | 48.0°F (1981) | 1.87 in (2016) |
| August 20 | 96.1°F (1983) | 48.0°F (1992) | 1.71 in (2007) |
| August 21 | 93.9°F (1983) | 48.0°F (1992) | 1.70 in (2014) |
| August 22 | 97.0°F (2003) | 46.0°F (1969) | 1.89 in (2002) |
| August 23 | 91.0°F (1968) | 46.9°F (1966) | 1.51 in (2007) |
| August 24 | 95.0°F (2023) | 46.0°F (1987) | 4.85 in (2007) |
| August 25 | 95.0°F (2023) | 45.0°F (1977) | 1.72 in (1998) |
| August 26 | 95.0°F (1991) | 50.0°F (2017) | 2.57 in (1972) |
| August 27 | 95.0°F (2003) | 44.1°F (1968) | 1.97 in (2009) |
| August 28 | 97.0°F (1991) | 39.0°F (1986) | 1.12 in (1977) |
| August 29 | 96.1°F (1984) | 39.9°F (1986) | 2.30 in (2022) |
| August 30 | 96.1°F (1984) | 45.0°F (1986) | 1.43 in (2016) |
| August 31 | 93.9°F (2013) | 39.9°F (1967) | 2.10 in (2013) |