August weather in Shelbyville, IL
The average temperature in Shelbyville in August is 74.7°F (64.6°F–84.9°F). Average precipitation: 3.41 inches.
August is a summer month in Shelbyville, and is warmer than the annual average of 53.6°F. Daily temperatures swing about 20.3°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 13h 33m. For travel, August is a comfortable month to visit.
Avg High
84.9°F
Avg Low
64.6°F
Precipitation
3.41 in
Daylight
13h 33m
August records in Shelbyville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (2012) | 57.9°F (1976) | 0.97 in (2020) |
| August 2 | 97.0°F (2006) | 55.9°F (1977) | 2.70 in (2022) |
| August 3 | 99.0°F (2012) | 54.0°F (1976) | 2.20 in (2003) |
| August 4 | 95.0°F (1982) | 51.1°F (1976) | 2.80 in (2022) |
| August 5 | 97.0°F (2010) | 54.0°F (2017) | 2.82 in (1998) |
| August 6 | 95.0°F (1996) | 53.1°F (2020) | 1.10 in (2015) |
| August 7 | 97.0°F (1984) | 53.1°F (1997) | 1.88 in (2023) |
| August 8 | 96.1°F (1984) | 54.0°F (1976) | 2.00 in (2006) |
| August 9 | 96.1°F (2012) | 55.0°F (1976) | 1.50 in (2012) |
| August 10 | 96.1°F (2001) | 54.0°F (1976) | 1.39 in (1941) |
| August 11 | 98.1°F (2010) | 55.0°F (2011) | 0.48 in (2018) |
| August 12 | 99.0°F (2007) | 48.9°F (2004) | 1.67 in (1978) |
| August 13 | 98.1°F (2010) | 48.9°F (2004) | 2.78 in (2019) |
| August 14 | 96.1°F (2010) | 48.9°F (2004) | 1.43 in (2010) |
| August 15 | 99.0°F (1988) | 48.0°F (2004) | 2.26 in (1981) |
| August 16 | 100.0°F (1988) | 50.0°F (2004) | 3.06 in (2016) |
| August 17 | 100.9°F (1988) | 55.0°F (1976) | 2.13 in (2012) |
| August 18 | 100.0°F (1983) | 53.1°F (1976) | 0.96 in (2000) |
| August 19 | 100.0°F (1983) | 55.0°F (1977) | 0.63 in (2006) |
| August 20 | 100.0°F (1983) | 55.0°F (2012) | 1.80 in (2009) |
| August 21 | 99.0°F (1983) | 52.0°F (2004) | 0.80 in (2022) |
| August 22 | 97.0°F (2003) | 55.0°F (2024) | 0.84 in (2019) |
| August 23 | 98.1°F (2007) | 51.1°F (1997) | 0.72 in (2019) |
| August 24 | 96.1°F (2023) | 54.0°F (1977) | 0.79 in (1999) |
| August 25 | 100.0°F (2023) | 51.1°F (2015) | 1.07 in (2018) |
| August 26 | 99.0°F (2023) | 53.1°F (1985) | 2.25 in (1941) |
| August 27 | 99.0°F (2003) | 52.0°F (2025) | 2.00 in (2016) |
| August 28 | 97.0°F (2024) | 46.0°F (1986) | 3.00 in (2016) |
| August 29 | 97.0°F (2007) | 42.1°F (1986) | 1.60 in (2004) |
| August 30 | 95.0°F (2000) | 45.0°F (1986) | 0.37 in (2022) |
| August 31 | 95.0°F (2013) | 50.0°F (1986) | 0.71 in (1981) |