August weather in Oconomowoc, WI
The average temperature in Oconomowoc in August is 70.2°F (59.7°F–80.6°F). Average precipitation: 4.17 inches.
August is a summer month in Oconomowoc, and is warmer than the annual average of 47.2°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 46m. For travel, August is a comfortable month to visit.
Avg High
80.6°F
Avg Low
59.7°F
Precipitation
4.17 in
Daylight
13h 46m
August records in Oconomowoc
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (1988) | 46.0°F (1895) | 1.46 in (1945) |
| August 2 | 97.0°F (1988) | 46.9°F (1965) | 1.70 in (2024) |
| August 3 | 98.1°F (1964) | 45.0°F (1894) | 1.67 in (1960) |
| August 4 | 98.1°F (1947) | 43.0°F (1978) | 3.74 in (2004) |
| August 5 | 98.1°F (1947) | 45.0°F (1994) | 2.16 in (1980) |
| August 6 | 99.0°F (1947) | 39.0°F (1893) | 2.10 in (1998) |
| August 7 | 97.0°F (1947) | 48.0°F (1989) | 2.23 in (2021) |
| August 8 | 97.0°F (1894) | 46.0°F (1976) | 1.75 in (1965) |
| August 9 | 95.0°F (1893) | 46.0°F (1972) | 1.44 in (1954) |
| August 10 | 96.1°F (1944) | 45.0°F (1982) | 5.38 in (1995) |
| August 11 | 93.9°F (1944) | 45.0°F (1967) | 3.18 in (2025) |
| August 12 | 93.9°F (1988) | 42.1°F (1967) | 1.03 in (2014) |
| August 13 | 95.0°F (1944) | 48.0°F (1967) | 0.76 in (2016) |
| August 14 | 96.1°F (1944) | 43.0°F (1964) | 1.30 in (2002) |
| August 15 | 93.9°F (1988) | 42.1°F (1979) | 2.13 in (2023) |
| August 16 | 100.0°F (1988) | 42.1°F (1979) | 1.13 in (1983) |
| August 17 | 100.9°F (1988) | 45.0°F (1981) | 1.95 in (2018) |
| August 18 | 97.0°F (1947) | 42.1°F (1977) | 1.55 in (1960) |
| August 19 | 97.0°F (1983) | 46.0°F (1895) | 2.12 in (2007) |
| August 20 | 93.9°F (1947) | 39.9°F (1950) | 3.25 in (1968) |
| August 21 | 97.0°F (1955) | 43.0°F (2004) | 3.00 in (2018) |
| August 22 | 97.0°F (1947) | 44.1°F (2004) | 1.59 in (2002) |
| August 23 | 98.1°F (1947) | 43.0°F (1984) | 1.86 in (1975) |
| August 24 | 98.1°F (1947) | 43.0°F (1945) | 2.20 in (1997) |
| August 25 | 97.0°F (2023) | 42.1°F (1958) | 1.66 in (2022) |
| August 26 | 93.9°F (1948) | 43.0°F (1945) | 1.72 in (1986) |
| August 27 | 95.0°F (1973) | 39.9°F (1982) | 1.45 in (2018) |
| August 28 | 95.0°F (1973) | 42.1°F (1982) | 1.85 in (1977) |
| August 29 | 96.1°F (1984) | 39.0°F (1946) | 1.81 in (2022) |
| August 30 | 91.9°F (1945) | 41.0°F (1946) | 1.01 in (1957) |
| August 31 | 93.0°F (1953) | 39.9°F (2009) | 2.13 in (1981) |