August weather in Waukesha, WI
The average temperature in Waukesha in August is 69.4°F (58.9°F–79.8°F). Average precipitation: 4.18 inches.
August is a summer month in Waukesha, and is warmer than the annual average of 46.6°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 46m. For travel, August is a comfortable month to visit.
Avg High
79.8°F
Avg Low
58.9°F
Precipitation
4.18 in
Daylight
13h 46m
August records in Waukesha
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 96.1°F (1995) | 46.0°F (1924) | 2.14 in (1953) |
| August 2 | 96.1°F (1964) | 43.0°F (1927) | 1.19 in (1960) |
| August 3 | 97.0°F (1930) | 45.0°F (1920) | 2.32 in (1960) |
| August 4 | 100.0°F (1947) | 44.1°F (1912) | 2.82 in (2004) |
| August 5 | 99.0°F (1947) | 46.9°F (1913) | 2.00 in (1916) |
| August 6 | 102.0°F (1918) | 46.0°F (1948) | 2.10 in (2000) |
| August 7 | 97.0°F (1918) | 48.9°F (1940) | 2.10 in (1998) |
| August 8 | 96.1°F (1894) | 43.0°F (1922) | 2.12 in (2011) |
| August 9 | 100.0°F (1934) | 43.0°F (1922) | 1.35 in (2021) |
| August 10 | 99.0°F (1944) | 48.9°F (1919) | 6.00 in (2025) |
| August 11 | 97.0°F (1941) | 46.0°F (1930) | 1.32 in (2025) |
| August 12 | 93.9°F (1918) | 44.1°F (1967) | 1.07 in (1920) |
| August 13 | 98.1°F (1918) | 44.1°F (1924) | 5.02 in (2002) |
| August 14 | 97.0°F (1944) | 46.0°F (1964) | 1.35 in (2002) |
| August 15 | 95.0°F (1944) | 41.0°F (1929) | 2.41 in (2023) |
| August 16 | 99.0°F (1937) | 45.0°F (1979) | 1.95 in (1987) |
| August 17 | 98.1°F (1947) | 46.9°F (1924) | 2.58 in (1995) |
| August 18 | 99.0°F (1947) | 44.1°F (1924) | 0.88 in (2019) |
| August 19 | 99.0°F (1955) | 42.1°F (1915) | 1.83 in (2007) |
| August 20 | 99.0°F (1955) | 39.0°F (1950) | 3.52 in (1995) |
| August 21 | 100.0°F (1955) | 42.1°F (1950) | 1.69 in (1959) |
| August 22 | 97.0°F (1936) | 44.1°F (1923) | 1.67 in (1979) |
| August 23 | 99.0°F (1947) | 42.1°F (1927) | 1.54 in (2013) |
| August 24 | 100.9°F (1948) | 44.1°F (1920) | 2.11 in (1997) |
| August 25 | 96.1°F (1948) | 39.9°F (1917) | 1.90 in (1940) |
| August 26 | 96.1°F (1948) | 44.1°F (1945) | 1.78 in (1986) |
| August 27 | 96.1°F (1953) | 43.0°F (1915) | 0.92 in (1903) |
| August 28 | 97.0°F (1926) | 35.1°F (1915) | 2.18 in (1977) |
| August 29 | 98.1°F (1984) | 42.1°F (1934) | 1.87 in (1981) |
| August 30 | 95.0°F (1932) | 37.0°F (1915) | 2.33 in (1921) |
| August 31 | 98.1°F (1953) | 37.9°F (1915) | 1.40 in (1981) |