August weather in Waterloo, IL
The average temperature in Waterloo in August is °F (°F–°F). Average precipitation: 3.40 inches.
August is a summer month in Waterloo, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 13h 30m.
Avg High
°F
Avg Low
°F
Precipitation
3.40 in
Daylight
13h 30m
August records in Waterloo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 105.1°F (1980) | 54.0°F (1971) | 1.71 in (1934) |
| August 2 | 100.0°F (1963) | 55.9°F (1992) | 1.16 in (1924) |
| August 3 | 104.0°F (1964) | 54.0°F (1966) | 2.05 in (1946) |
| August 4 | 102.0°F (1964) | 53.1°F (1966) | 1.81 in (1940) |
| August 5 | 100.0°F (1947) | 53.1°F (1974) | 3.02 in (1998) |
| August 6 | 102.0°F (1947) | 50.0°F (1994) | 2.05 in (1986) |
| August 7 | 100.0°F (1947) | 51.1°F (1990) | 1.26 in (1983) |
| August 8 | 98.1°F (1980) | 51.1°F (1976) | 2.28 in (1927) |
| August 9 | 100.9°F (1988) | 53.1°F (1976) | 1.53 in (1970) |
| August 10 | 100.9°F (1988) | 52.0°F (1972) | 2.00 in (1961) |
| August 11 | 99.0°F (1980) | 55.0°F (1967) | 0.89 in (1939) |
| August 12 | 99.0°F (1988) | 46.9°F (1967) | 2.26 in (1939) |
| August 13 | 98.1°F (1945) | 45.0°F (1964) | 1.71 in (1935) |
| August 14 | 97.0°F (1988) | 52.0°F (1992) | 1.35 in (1950) |
| August 15 | 97.0°F (1988) | 50.0°F (1992) | 1.86 in (1941) |
| August 16 | 102.0°F (1988) | 52.0°F (1992) | 1.34 in (1934) |
| August 17 | 102.0°F (1988) | 53.1°F (1992) | 4.53 in (1923) |
| August 18 | 102.9°F (1988) | 55.0°F (1963) | 1.34 in (1939) |
| August 19 | 105.1°F (1962) | 54.0°F (1981) | 1.79 in (1968) |
| August 20 | 104.0°F (1962) | 50.0°F (1967) | 7.03 in (1915) |
| August 21 | 107.1°F (1962) | 53.1°F (1967) | 1.54 in (1951) |
| August 22 | 100.9°F (1987) | 57.0°F (1969) | 1.22 in (1964) |
| August 23 | 100.0°F (1983) | 54.0°F (1966) | 0.73 in (1926) |
| August 24 | 96.1°F (1947) | 53.1°F (1966) | 1.19 in (1924) |
| August 25 | 99.0°F (1978) | 55.9°F (1966) | 1.87 in (1914) |
| August 26 | 98.1°F (1978) | 55.9°F (2010) | 3.40 in (1975) |
| August 27 | 99.0°F (1983) | 50.0°F (1967) | 2.36 in (1987) |
| August 28 | 100.9°F (1983) | 46.0°F (1986) | 1.66 in (1950) |
| August 29 | 99.0°F (1990) | 46.0°F (1965) | 1.33 in (1948) |
| August 30 | 100.0°F (1984) | 50.0°F (1986) | 1.79 in (1956) |
| August 31 | 95.0°F (2000) | 48.9°F (1967) | 1.17 in (1920) |