August weather in Geneseo, IL
The average temperature in Geneseo in August is 73.1°F (62.9°F–83.4°F). Average precipitation: 4.10 inches.
August is a summer month in Geneseo, and is warmer than the annual average of 50.9°F. Daily temperatures swing about 20.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 40m. For travel, August is a comfortable month to visit.
Avg High
83.4°F
Avg Low
62.9°F
Precipitation
4.10 in
Daylight
13h 40m
August records in Geneseo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.0°F (1987) | 51.1°F (1908) | 1.72 in (1966) |
| August 2 | 99.0°F (1988) | 50.0°F (1907) | 5.00 in (1932) |
| August 3 | 100.0°F (1983) | 48.9°F (1976) | 3.18 in (1943) |
| August 4 | 99.0°F (1988) | 48.0°F (1978) | 3.85 in (1965) |
| August 5 | 98.1°F (1900) | 48.9°F (1978) | 2.54 in (1981) |
| August 6 | 99.0°F (1947) | 48.9°F (1994) | 1.65 in (1972) |
| August 7 | 99.0°F (2012) | 50.0°F (1975) | 2.40 in (2007) |
| August 8 | 102.0°F (1988) | 46.9°F (1976) | 1.87 in (1939) |
| August 9 | 99.0°F (1909) | 50.0°F (1972) | 1.43 in (1969) |
| August 10 | 100.0°F (1944) | 48.0°F (1965) | 1.15 in (2017) |
| August 11 | 99.0°F (1941) | 48.0°F (1968) | 4.43 in (1949) |
| August 12 | 98.1°F (1941) | 46.9°F (1946) | 1.60 in (2016) |
| August 13 | 97.0°F (1944) | 48.9°F (2004) | 1.70 in (1902) |
| August 14 | 98.1°F (1909) | 44.1°F (1964) | 2.94 in (1981) |
| August 15 | 100.9°F (1988) | 46.9°F (1979) | 2.28 in (1900) |
| August 16 | 102.0°F (1988) | 48.0°F (1976) | 5.15 in (1898) |
| August 17 | 102.9°F (1988) | 51.1°F (1992) | 2.30 in (1990) |
| August 18 | 102.0°F (1988) | 45.0°F (1963) | 4.31 in (1979) |
| August 19 | 100.9°F (1983) | 51.1°F (1943) | 2.73 in (1924) |
| August 20 | 99.0°F (1968) | 48.0°F (1956) | 3.77 in (1979) |
| August 21 | 98.1°F (1968) | 48.0°F (1956) | 3.94 in (1987) |
| August 22 | 99.0°F (1947) | 51.1°F (1907) | 1.77 in (1996) |
| August 23 | 100.0°F (1906) | 48.0°F (1908) | 1.89 in (1895) |
| August 24 | 100.0°F (1947) | 44.1°F (1942) | 2.90 in (2016) |
| August 25 | 98.1°F (1947) | 43.0°F (1958) | 6.57 in (1898) |
| August 26 | 95.0°F (2003) | 45.0°F (1964) | 4.05 in (1987) |
| August 27 | 97.0°F (1973) | 46.0°F (1968) | 2.76 in (1903) |
| August 28 | 96.1°F (1973) | 39.9°F (1986) | 2.52 in (2018) |
| August 29 | 97.0°F (1984) | 44.1°F (1986) | 4.85 in (1951) |
| August 30 | 100.0°F (2013) | 46.9°F (1946) | 1.97 in (2016) |
| August 31 | 98.1°F (1947) | 46.0°F (1967) | 1.29 in (1989) |