August weather in Grayslake, IL
The average temperature in Grayslake in August is °F (°F–°F). Average precipitation: 3.42 inches.
August is a summer month in Grayslake, and is cooler than the annual average of 0°F. Expect about 9 days with precipitation. Daylight averages about 13h 43m.
Avg High
°F
Avg Low
°F
Precipitation
3.42 in
Daylight
13h 43m
August records in Grayslake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | — | — | 0.42 in (2000) |
| August 2 | — | — | 0.13 in (2003) |
| August 3 | — | — | 0.27 in (1995) |
| August 4 | — | — | 0.89 in (2003) |
| August 5 | — | — | 1.40 in (1995) |
| August 6 | — | — | 0.95 in (1996) |
| August 7 | — | — | 0.81 in (1998) |
| August 8 | — | — | 1.64 in (1998) |
| August 9 | — | — | 0.36 in (1991) |
| August 10 | — | — | 0.93 in (1995) |
| August 11 | — | — | 1.24 in (1994) |
| August 12 | — | — | 0.40 in (1990) |
| August 13 | — | — | 2.83 in (1987) |
| August 14 | — | — | 2.33 in (1987) |
| August 15 | — | — | 0.28 in (1997) |
| August 16 | — | — | 1.17 in (2001) |
| August 17 | — | — | 0.97 in (1997) |
| August 18 | — | — | 2.00 in (1990) |
| August 19 | — | — | 0.74 in (1999) |
| August 20 | — | — | 0.47 in (1995) |
| August 21 | — | — | 0.18 in (1994) |
| August 22 | — | — | 2.10 in (2002) |
| August 23 | — | — | 0.42 in (1996) |
| August 24 | — | — | 1.12 in (1997) |
| August 25 | — | — | 1.24 in (1987) |
| August 26 | — | — | 1.87 in (1987) |
| August 27 | — | — | 0.38 in (1992) |
| August 28 | — | — | 0.36 in (1998) |
| August 29 | — | — | 1.14 in (1989) |
| August 30 | — | — | 0.57 in (1993) |
| August 31 | — | — | 1.58 in (1993) |