August weather in Mattoon, IL
The average temperature in Mattoon in August is 74.8°F (65.1°F–84.5°F). Average precipitation: 2.85 inches.
August is a summer month in Mattoon, and is warmer than the annual average of 53.6°F. Daily temperatures swing about 19.4°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
84.5°F
Avg Low
65.1°F
Precipitation
2.85 in
Daylight
13h 33m
August records in Mattoon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 97.0°F (1964) | 52.0°F (1949) | 1.04 in (1979) |
| August 2 | 100.0°F (1964) | 53.1°F (1965) | 1.50 in (1995) |
| August 3 | 102.0°F (1964) | 51.1°F (1966) | 1.36 in (1898) |
| August 4 | 95.0°F (1956) | 51.1°F (1951) | 1.51 in (1961) |
| August 5 | 95.0°F (1965) | 41.0°F (1893) | 2.95 in (1899) |
| August 6 | 97.0°F (1894) | 48.9°F (1994) | 2.11 in (1962) |
| August 7 | 96.1°F (1964) | 48.9°F (1990) | 1.41 in (1995) |
| August 8 | 99.0°F (1980) | 51.1°F (1989) | 0.98 in (1950) |
| August 9 | 100.0°F (1980) | 50.0°F (1904) | 1.65 in (1968) |
| August 10 | 98.1°F (1980) | 51.1°F (1972) | 1.46 in (1974) |
| August 11 | 98.1°F (1894) | 48.9°F (1965) | 1.50 in (1952) |
| August 12 | 96.1°F (1894) | 46.9°F (1967) | 1.84 in (1896) |
| August 13 | 95.0°F (1988) | 48.0°F (1964) | 2.01 in (2019) |
| August 14 | 95.0°F (1954) | 53.1°F (1963) | 1.53 in (1985) |
| August 15 | 100.0°F (1988) | 48.0°F (1992) | 3.08 in (1981) |
| August 16 | 104.0°F (1988) | 51.1°F (1964) | 3.04 in (2016) |
| August 17 | 102.0°F (1988) | 54.0°F (1963) | 1.50 in (2012) |
| August 18 | 102.0°F (1988) | 46.0°F (1963) | 1.98 in (1980) |
| August 19 | 99.0°F (1983) | 48.9°F (1953) | 1.37 in (1904) |
| August 20 | 102.9°F (1983) | 46.9°F (1950) | 1.31 in (1904) |
| August 21 | 99.0°F (1983) | 43.0°F (1950) | 1.32 in (1977) |
| August 22 | 93.9°F (1898) | 48.0°F (1950) | 1.15 in (1900) |
| August 23 | 96.1°F (1954) | 51.1°F (1951) | 1.04 in (2019) |
| August 24 | 96.1°F (1954) | 48.9°F (1951) | 1.34 in (1985) |
| August 25 | 100.0°F (1983) | 48.0°F (1958) | 1.35 in (1975) |
| August 26 | 98.1°F (1893) | 52.0°F (1963) | 4.86 in (1992) |
| August 27 | 97.0°F (1953) | 48.0°F (1968) | 1.40 in (2016) |
| August 28 | 96.1°F (1953) | 42.1°F (1986) | 1.44 in (1974) |
| August 29 | 96.1°F (1953) | 39.9°F (1986) | 3.76 in (1951) |
| August 30 | 97.0°F (1953) | 42.1°F (1986) | 2.08 in (2022) |
| August 31 | 97.0°F (1953) | 46.0°F (1967) | 1.42 in (1950) |