August weather in Round Lake Heights, IL
The average temperature in Round Lake Heights in August is 71.2°F (61.8°F–80.6°F). Average precipitation: 3.27 inches.
August is a summer month in Round Lake Heights, and is warmer than the annual average of 48.6°F. Daily temperatures swing about 18.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 43m. For travel, August is a comfortable month to visit.
Avg High
80.6°F
Avg Low
61.8°F
Precipitation
3.27 in
Daylight
13h 43m
August records in Round Lake Heights
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1988) | 53.1°F (1990) | 0.83 in (2003) |
| August 2 | 97.0°F (1988) | 57.0°F (1990) | 0.49 in (2001) |
| August 3 | 98.1°F (1988) | 55.0°F (1992) | 0.47 in (2004) |
| August 4 | 97.0°F (1988) | 52.0°F (1992) | 1.22 in (1995) |
| August 5 | 90.0°F (2001) | 48.9°F (1994) | 1.40 in (1996) |
| August 6 | 91.9°F (1988) | 48.0°F (1994) | 1.07 in (1986) |
| August 7 | 96.1°F (2001) | 50.0°F (1990) | 0.58 in (1992) |
| August 8 | 98.1°F (1988) | 51.1°F (1989) | 1.82 in (1991) |
| August 9 | 93.9°F (2005) | 53.1°F (1994) | 1.00 in (1995) |
| August 10 | 87.1°F (1998) | 53.1°F (1994) | 1.82 in (1994) |
| August 11 | 91.9°F (2002) | 52.0°F (2004) | 0.23 in (1997) |
| August 12 | 95.0°F (1995) | 50.0°F (2004) | 1.66 in (2005) |
| August 13 | 93.0°F (1995) | 50.0°F (1992) | 1.65 in (2002) |
| August 14 | 91.9°F (1988) | 50.0°F (2004) | 3.97 in (1987) |
| August 15 | 91.0°F (2000) | 50.0°F (2004) | 0.48 in (1993) |
| August 16 | 98.1°F (1988) | 50.0°F (1992) | 1.35 in (1987) |
| August 17 | 99.0°F (1988) | 52.0°F (1992) | 1.45 in (1990) |
| August 18 | 89.1°F (1990) | 55.0°F (2002) | 1.40 in (1990) |
| August 19 | 86.0°F (2005) | 53.1°F (1992) | 0.74 in (1990) |
| August 20 | 89.1°F (2003) | 52.0°F (1992) | 0.50 in (2005) |
| August 21 | 93.9°F (2003) | 48.9°F (2004) | 0.64 in (2002) |
| August 22 | 86.0°F (1996) | 52.0°F (2004) | 0.83 in (2001) |
| August 23 | 89.1°F (1998) | 52.0°F (1987) | 1.37 in (1997) |
| August 24 | 88.0°F (1993) | 50.0°F (1987) | 0.70 in (1998) |
| August 25 | 93.0°F (1991) | 55.0°F (1987) | 0.68 in (1992) |
| August 26 | 91.9°F (1991) | 53.1°F (1988) | 2.05 in (1987) |
| August 27 | 91.0°F (1990) | 53.1°F (1992) | 0.41 in (2004) |
| August 28 | 93.0°F (1991) | 50.0°F (1992) | 1.49 in (1989) |
| August 29 | 91.0°F (1991) | 51.1°F (1988) | 0.54 in (1992) |
| August 30 | 87.1°F (1991) | 53.1°F (1988) | 0.32 in (1993) |
| August 31 | 89.1°F (2000) | 51.1°F (1992) | 1.55 in (1989) |