August weather in Rosemont, IL
The average temperature in Rosemont in August is 73.8°F (65.1°F–82.5°F). Average precipitation: 4.25 inches.
August is a summer month in Rosemont, and is warmer than the annual average of 51.3°F. Daily temperatures swing about 17.4°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
82.5°F
Avg Low
65.1°F
Precipitation
4.25 in
Daylight
13h 42m
August records in Rosemont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1988) | 51.1°F (1990) | 2.24 in (2003) |
| August 2 | 100.9°F (1991) | 48.9°F (1965) | 1.42 in (1981) |
| August 3 | 96.1°F (1964) | 48.0°F (1966) | 1.30 in (1959) |
| August 4 | 97.0°F (1988) | 48.0°F (1966) | 3.47 in (1989) |
| August 5 | 93.9°F (2018) | 50.0°F (1978) | 1.87 in (1998) |
| August 6 | 96.1°F (1968) | 48.0°F (1994) | 1.11 in (2000) |
| August 7 | 95.0°F (2001) | 50.0°F (1990) | 2.36 in (2018) |
| August 8 | 99.0°F (1988) | 48.9°F (1976) | 1.74 in (1991) |
| August 9 | 95.0°F (2001) | 45.0°F (1964) | 1.39 in (1984) |
| August 10 | 93.0°F (1971) | 48.9°F (1982) | 1.49 in (1979) |
| August 11 | 93.0°F (1995) | 45.0°F (1965) | 0.85 in (2014) |
| August 12 | 98.1°F (1995) | 44.1°F (1967) | 1.55 in (1990) |
| August 13 | 96.1°F (1995) | 42.1°F (1967) | 2.86 in (1987) |
| August 14 | 95.0°F (1995) | 42.1°F (1964) | 6.49 in (1987) |
| August 15 | 93.9°F (1988) | 41.0°F (1964) | 1.87 in (1993) |
| August 16 | 98.1°F (1983) | 45.0°F (1979) | 3.43 in (1968) |
| August 17 | 98.1°F (1988) | 46.0°F (1963) | 1.69 in (2025) |
| August 18 | 93.0°F (1972) | 42.1°F (1963) | 2.85 in (1990) |
| August 19 | 99.0°F (1983) | 48.9°F (1964) | 1.33 in (2007) |
| August 20 | 95.0°F (1968) | 48.9°F (1992) | 1.35 in (2005) |
| August 21 | 95.0°F (1968) | 48.0°F (1961) | 1.43 in (1975) |
| August 22 | 93.9°F (1959) | 48.9°F (1961) | 4.45 in (2002) |
| August 23 | 98.1°F (2023) | 46.9°F (1965) | 2.35 in (2007) |
| August 24 | 100.0°F (2023) | 45.0°F (1964) | 2.30 in (1971) |
| August 25 | 95.0°F (1991) | 46.9°F (1964) | 2.49 in (1972) |
| August 26 | 96.1°F (2024) | 41.0°F (1964) | 2.46 in (1987) |
| August 27 | 99.0°F (2024) | 46.9°F (1982) | 0.95 in (2009) |
| August 28 | 95.0°F (1980) | 42.1°F (1965) | 1.41 in (2004) |
| August 29 | 93.9°F (1983) | 41.0°F (1965) | 2.24 in (1979) |
| August 30 | 96.1°F (2013) | 48.0°F (1986) | 4.31 in (2001) |
| August 31 | 93.0°F (1960) | 46.9°F (1967) | 0.44 in (1980) |