July weather in Prospect Heights, IL
The average temperature in Prospect Heights in July is 74.9°F (65.8°F–84.0°F). Average precipitation: 3.15 inches.
July is a summer month in Prospect Heights, and is warmer than the annual average of 50.8°F. Daily temperatures swing about 18.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 47m. For travel, July is a comfortable month to visit.
Avg High
84.0°F
Avg Low
65.8°F
Precipitation
3.15 in
Daylight
14h 47m
July records in Prospect Heights
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 95.0°F (2002) | 52.0°F (2015) | 0.54 in (1999) |
| July 2 | 98.1°F (2012) | 50.0°F (2001) | 1.96 in (2023) |
| July 3 | 97.0°F (2012) | 54.0°F (1996) | 1.75 in (2004) |
| July 4 | 102.9°F (2012) | 51.1°F (1996) | 1.41 in (2022) |
| July 5 | 102.9°F (2012) | 51.1°F (1997) | 0.89 in (2022) |
| July 6 | 104.0°F (2012) | 54.0°F (2001) | 1.41 in (2003) |
| July 7 | 95.0°F (2020) | 53.1°F (1997) | 0.57 in (1998) |
| July 8 | 96.1°F (2002) | 52.0°F (2015) | 0.44 in (2010) |
| July 9 | 93.9°F (2007) | 53.1°F (1997) | 0.78 in (2004) |
| July 10 | 96.1°F (2019) | 50.0°F (1996) | 1.14 in (2000) |
| July 11 | 91.0°F (2016) | 50.0°F (1996) | 0.55 in (2017) |
| July 12 | 91.0°F (2016) | 55.0°F (2009) | 3.22 in (2017) |
| July 13 | 95.0°F (1997) | 55.9°F (1999) | 0.59 in (2024) |
| July 14 | 91.9°F (1997) | 55.0°F (2009) | 1.55 in (2024) |
| July 15 | 96.1°F (2006) | 55.9°F (2014) | 1.20 in (2003) |
| July 16 | 97.0°F (2012) | 55.9°F (2014) | 0.88 in (2015) |
| July 17 | 99.0°F (2012) | 53.1°F (2014) | 0.80 in (2019) |
| July 18 | 96.1°F (2013) | 54.0°F (2003) | 2.30 in (2019) |
| July 19 | 97.0°F (2013) | 54.0°F (2003) | 0.79 in (2008) |
| July 20 | 100.0°F (2011) | 53.1°F (2009) | 1.25 in (2017) |
| July 21 | 100.0°F (2011) | 55.9°F (1996) | 2.24 in (2019) |
| July 22 | 93.0°F (2001) | 54.0°F (1996) | 2.77 in (2011) |
| July 23 | 97.0°F (2012) | 53.1°F (2000) | 3.38 in (2011) |
| July 24 | 102.0°F (2005) | 50.0°F (2000) | 2.31 in (2010) |
| July 25 | 98.1°F (2012) | 55.9°F (2000) | 0.59 in (2001) |
| July 26 | 97.0°F (1997) | 57.9°F (1996) | 0.62 in (2013) |
| July 27 | 90.0°F (1997) | 57.0°F (2013) | 1.05 in (2011) |
| July 28 | 93.9°F (2025) | 55.9°F (2005) | 1.54 in (2023) |
| July 29 | 98.1°F (1999) | 53.1°F (2003) | 0.35 in (2011) |
| July 30 | 102.0°F (1999) | 57.0°F (1997) | 0.60 in (2025) |
| July 31 | 98.1°F (2002) | 55.9°F (1997) | 1.65 in (2010) |