August weather in Watertown, WI
The average temperature in Watertown in August is 69.3°F (59.0°F–79.5°F). Average precipitation: 4.11 inches.
August is a summer month in Watertown, and is warmer than the annual average of 46.4°F. Daily temperatures swing about 20.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 47m. For travel, August is a comfortable month to visit.
Avg High
79.5°F
Avg Low
59.0°F
Precipitation
4.11 in
Daylight
13h 47m
August records in Watertown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 97.0°F (1939) | 46.0°F (1893) | 2.55 in (1935) |
| August 2 | 102.0°F (1988) | 45.0°F (1907) | 2.82 in (1942) |
| August 3 | 99.0°F (1988) | 41.0°F (1894) | 1.65 in (1924) |
| August 4 | 100.0°F (1947) | 44.1°F (1971) | 3.90 in (1915) |
| August 5 | 99.0°F (1947) | 43.0°F (1957) | 2.32 in (1916) |
| August 6 | 100.9°F (1947) | 37.9°F (1893) | 1.53 in (1996) |
| August 7 | 96.1°F (1937) | 36.0°F (1893) | 2.09 in (1972) |
| August 8 | 97.0°F (1941) | 37.9°F (1904) | 2.46 in (2021) |
| August 9 | 95.0°F (1936) | 44.1°F (1964) | 2.12 in (1960) |
| August 10 | 99.0°F (1944) | 48.0°F (1967) | 2.49 in (1995) |
| August 11 | 100.0°F (1941) | 42.1°F (1904) | 1.74 in (1949) |
| August 12 | 95.0°F (1947) | 42.1°F (1893) | 1.03 in (2025) |
| August 13 | 97.0°F (1944) | 41.0°F (1893) | 1.12 in (1985) |
| August 14 | 98.1°F (1944) | 41.0°F (1964) | 1.49 in (1971) |
| August 15 | 98.1°F (1936) | 41.0°F (1979) | 1.99 in (2023) |
| August 16 | 102.9°F (1937) | 42.1°F (1979) | 1.30 in (1952) |
| August 17 | 100.9°F (1988) | 45.0°F (1893) | 2.90 in (2018) |
| August 18 | 102.0°F (1988) | 43.0°F (1963) | 5.42 in (2018) |
| August 19 | 100.0°F (1947) | 45.0°F (1897) | 2.40 in (1914) |
| August 20 | 100.9°F (1983) | 39.0°F (1893) | 3.44 in (1968) |
| August 21 | 98.1°F (1947) | 39.9°F (1893) | 2.24 in (2018) |
| August 22 | 100.0°F (1947) | 42.1°F (2024) | 1.42 in (1959) |
| August 23 | 100.9°F (1947) | 42.1°F (1902) | 2.29 in (2007) |
| August 24 | 102.0°F (1947) | 41.0°F (1908) | 2.04 in (1997) |
| August 25 | 96.1°F (1948) | 37.0°F (1958) | 1.92 in (2022) |
| August 26 | 97.0°F (1948) | 42.1°F (1917) | 1.79 in (1992) |
| August 27 | 97.0°F (1937) | 39.9°F (1915) | 2.00 in (1986) |
| August 28 | 95.0°F (1926) | 39.9°F (1893) | 2.93 in (1959) |
| August 29 | 96.1°F (1984) | 37.9°F (1965) | 1.54 in (1981) |
| August 30 | 95.0°F (1937) | 34.0°F (1893) | 1.25 in (1920) |
| August 31 | 96.1°F (1937) | 36.0°F (1893) | 2.10 in (1921) |