July weather in DeKalb, IL
The average temperature in DeKalb in July is 73.2°F (63.3°F–83.1°F). Average precipitation: 4.00 inches.
July is a summer month in DeKalb, and is warmer than the annual average of 48.5°F. Daily temperatures swing about 19.8°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 46m. For travel, July is a comfortable month to visit.
Avg High
83.1°F
Avg Low
63.3°F
Precipitation
4.00 in
Daylight
14h 46m
July records in DeKalb
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 96.1°F (1970) | 48.0°F (1976) | 1.72 in (1983) |
| July 2 | 95.0°F (1966) | 48.9°F (2001) | 3.10 in (1983) |
| July 3 | 95.0°F (2012) | 48.0°F (1968) | 1.70 in (2000) |
| July 4 | 95.0°F (2012) | 46.0°F (1972) | 1.67 in (1998) |
| July 5 | 98.1°F (2012) | 45.0°F (1972) | 1.30 in (1995) |
| July 6 | 98.1°F (2012) | 43.0°F (1967) | 1.91 in (2016) |
| July 7 | 100.0°F (2012) | 48.9°F (1983) | 1.67 in (1982) |
| July 8 | 100.9°F (2012) | 51.1°F (1972) | 1.17 in (2008) |
| July 9 | 95.0°F (1974) | 53.1°F (2015) | 1.44 in (1986) |
| July 10 | 100.9°F (1966) | 46.9°F (1968) | 3.32 in (2007) |
| July 11 | 100.9°F (1966) | 48.9°F (1968) | 1.55 in (2008) |
| July 12 | 97.0°F (1970) | 50.0°F (1975) | 3.55 in (1989) |
| July 13 | 96.1°F (1974) | 48.9°F (1975) | 1.26 in (2014) |
| July 14 | 102.0°F (1995) | 51.1°F (1967) | 1.12 in (2024) |
| July 15 | 98.1°F (1988) | 51.1°F (2014) | 1.98 in (2024) |
| July 16 | 100.0°F (1988) | 52.0°F (2014) | 1.77 in (2020) |
| July 17 | 96.1°F (2012) | 46.9°F (1976) | 0.64 in (2007) |
| July 18 | 97.0°F (1966) | 51.1°F (1979) | 8.09 in (1996) |
| July 19 | 97.0°F (1991) | 54.0°F (1984) | 3.10 in (1993) |
| July 20 | 95.0°F (1980) | 51.1°F (1970) | 2.10 in (2017) |
| July 21 | 97.0°F (2011) | 48.9°F (1966) | 2.10 in (1980) |
| July 22 | 99.0°F (1991) | 51.1°F (1970) | 6.26 in (1982) |
| July 23 | 96.1°F (1983) | 53.1°F (1970) | 0.86 in (1968) |
| July 24 | 93.0°F (1999) | 52.0°F (2014) | 4.67 in (2010) |
| July 25 | 99.0°F (2005) | 52.0°F (1991) | 0.94 in (1993) |
| July 26 | 98.1°F (2012) | 48.9°F (1991) | 1.90 in (1969) |
| July 27 | 96.1°F (1997) | 48.9°F (1971) | 2.01 in (1970) |
| July 28 | 98.1°F (1983) | 51.1°F (2013) | 2.79 in (1979) |
| July 29 | 97.0°F (1983) | 48.0°F (1981) | 1.18 in (2023) |
| July 30 | 96.1°F (1988) | 48.0°F (1971) | 2.48 in (1989) |
| July 31 | 99.0°F (1999) | 48.9°F (1971) | 1.07 in (1992) |