August weather in Pontiac, IL
The average temperature in Pontiac in August is 73.3°F (63.6°F–83.0°F). Average precipitation: 3.73 inches.
August is a summer month in Pontiac, and is warmer than the annual average of 51.8°F. Daily temperatures swing about 19.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 38m. For travel, August is a comfortable month to visit.
Avg High
83.0°F
Avg Low
63.6°F
Precipitation
3.73 in
Daylight
13h 38m
August records in Pontiac
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.1°F (1988) | 50.0°F (1947) | 2.52 in (1994) |
| August 2 | 100.0°F (1988) | 48.9°F (1920) | 2.52 in (1994) |
| August 3 | 102.9°F (1930) | 46.0°F (1912) | 5.59 in (1943) |
| August 4 | 100.9°F (1916) | 46.0°F (1912) | 2.28 in (1960) |
| August 5 | 104.0°F (1918) | 48.9°F (1912) | 2.02 in (1935) |
| August 6 | 102.0°F (1918) | 48.9°F (1994) | 1.40 in (1972) |
| August 7 | 100.0°F (1918) | 48.0°F (1989) | 1.08 in (1939) |
| August 8 | 100.0°F (1934) | 48.0°F (1989) | 0.97 in (2013) |
| August 9 | 102.9°F (1934) | 46.9°F (1985) | 3.10 in (2007) |
| August 10 | 99.0°F (1934) | 48.0°F (1972) | 2.02 in (2010) |
| August 11 | 100.0°F (1941) | 48.0°F (1967) | 2.60 in (1916) |
| August 12 | 99.0°F (1918) | 46.9°F (1967) | 1.37 in (1952) |
| August 13 | 100.0°F (1936) | 46.9°F (2004) | 1.95 in (1909) |
| August 14 | 98.1°F (1988) | 46.9°F (1964) | 1.03 in (2005) |
| August 15 | 97.0°F (1913) | 46.9°F (1979) | 3.63 in (1981) |
| August 16 | 100.9°F (1913) | 50.0°F (1992) | 2.67 in (1993) |
| August 17 | 104.0°F (1988) | 51.1°F (1942) | 3.30 in (1997) |
| August 18 | 104.0°F (1988) | 45.0°F (1963) | 2.70 in (1940) |
| August 19 | 102.0°F (1988) | 48.9°F (2012) | 1.33 in (2002) |
| August 20 | 100.9°F (1916) | 44.1°F (1950) | 1.65 in (1979) |
| August 21 | 100.0°F (1916) | 45.0°F (1950) | 1.46 in (2007) |
| August 22 | 100.0°F (1936) | 46.0°F (1923) | 1.23 in (1989) |
| August 23 | 100.0°F (1914) | 48.9°F (1923) | 1.23 in (2002) |
| August 24 | 98.1°F (1936) | 45.0°F (1942) | 1.87 in (1989) |
| August 25 | 96.1°F (1936) | 45.0°F (1917) | 1.25 in (1909) |
| August 26 | 96.1°F (1936) | 46.0°F (1910) | 2.12 in (2004) |
| August 27 | 96.1°F (1930) | 46.0°F (1968) | 2.42 in (1983) |
| August 28 | 93.9°F (1980) | 42.1°F (1915) | 1.30 in (1936) |
| August 29 | 98.1°F (1925) | 41.0°F (1965) | 3.00 in (1951) |
| August 30 | 98.1°F (1984) | 42.1°F (1915) | 3.23 in (1955) |
| August 31 | 96.1°F (1932) | 39.9°F (1915) | 1.63 in (1944) |