August weather in Naperville, IL
The average temperature in Naperville in August is 72.9°F (62.1°F–83.7°F). Average precipitation: 4.40 inches.
August is a summer month in Naperville, and is warmer than the annual average of 51.1°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 41m. For travel, August is a comfortable month to visit.
Avg High
83.7°F
Avg Low
62.1°F
Precipitation
4.40 in
Daylight
13h 41m
August records in Naperville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (1988) | 48.9°F (1984) | 2.23 in (1961) |
| August 2 | 100.0°F (1991) | 50.0°F (1976) | 1.94 in (1942) |
| August 3 | 98.1°F (1991) | 45.0°F (1976) | 2.18 in (1957) |
| August 4 | 98.1°F (1947) | 46.9°F (1972) | 1.34 in (2004) |
| August 5 | 98.1°F (1947) | 45.0°F (1972) | 1.84 in (1998) |
| August 6 | 99.0°F (1947) | 46.0°F (1994) | 2.13 in (1951) |
| August 7 | 96.1°F (2001) | 48.0°F (1975) | 1.99 in (2003) |
| August 8 | 98.1°F (1988) | 45.0°F (1976) | 2.78 in (1977) |
| August 9 | 98.1°F (1936) | 46.9°F (1976) | 1.20 in (1946) |
| August 10 | 98.1°F (1944) | 45.0°F (1972) | 1.86 in (1984) |
| August 11 | 97.0°F (1941) | 48.0°F (1967) | 2.78 in (1994) |
| August 12 | 99.0°F (1995) | 43.0°F (1967) | 1.68 in (1997) |
| August 13 | 98.1°F (1944) | 43.0°F (1967) | 1.70 in (1989) |
| August 14 | 98.1°F (1944) | 46.9°F (1964) | 6.01 in (1987) |
| August 15 | 96.1°F (1943) | 44.1°F (2004) | 2.18 in (1898) |
| August 16 | 99.0°F (1988) | 43.0°F (1979) | 1.38 in (1938) |
| August 17 | 99.0°F (1988) | 42.1°F (1976) | 4.43 in (1968) |
| August 18 | 98.1°F (1988) | 37.9°F (1963) | 2.92 in (1954) |
| August 19 | 99.0°F (1947) | 44.1°F (1963) | 1.40 in (1937) |
| August 20 | 97.0°F (1947) | 42.1°F (1950) | 3.32 in (1937) |
| August 21 | 97.0°F (1955) | 42.1°F (1950) | 1.13 in (1964) |
| August 22 | 100.0°F (1936) | 46.9°F (1969) | 1.70 in (1896) |
| August 23 | 98.1°F (1947) | 46.0°F (1940) | 2.08 in (1895) |
| August 24 | 99.0°F (1947) | 44.1°F (1942) | 1.35 in (1993) |
| August 25 | 98.1°F (1991) | 44.1°F (1977) | 2.35 in (1971) |
| August 26 | 96.1°F (1953) | 45.0°F (1945) | 5.49 in (1972) |
| August 27 | 99.0°F (1938) | 44.1°F (1968) | 1.68 in (1987) |
| August 28 | 96.1°F (1984) | 42.1°F (1982) | 1.10 in (1981) |
| August 29 | 97.0°F (1984) | 42.1°F (1965) | 1.62 in (1977) |
| August 30 | 97.0°F (1953) | 44.1°F (1976) | 3.38 in (1975) |
| August 31 | 99.0°F (1953) | 44.1°F (1967) | 0.78 in (1944) |