July weather in Watertown, SD
The average temperature in Watertown in July is 71.0°F (60.0°F–82.0°F). Average precipitation: 3.05 inches.
July is a summer month in Watertown, and is warmer than the annual average of 43°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 15h 5m. For travel, July is a comfortable month to visit.
Avg High
82.0°F
Avg Low
60.0°F
Precipitation
3.05 in
Daylight
15h 5m
July records in Watertown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 97.0°F (1900) | 39.9°F (1898) | 1.80 in (2019) |
| July 2 | 100.0°F (1911) | 43.0°F (1917) | 1.15 in (1955) |
| July 3 | 100.0°F (1929) | 35.1°F (1917) | 3.40 in (1905) |
| July 4 | 102.0°F (1966) | 39.9°F (1967) | 2.69 in (1963) |
| July 5 | 100.0°F (1988) | 42.1°F (1899) | 1.58 in (1900) |
| July 6 | 104.0°F (1936) | 39.9°F (1942) | 1.65 in (1921) |
| July 7 | 100.0°F (1893) | 41.0°F (1908) | 2.80 in (1950) |
| July 8 | 98.1°F (1936) | 39.9°F (1899) | 1.50 in (1909) |
| July 9 | 105.1°F (1936) | 39.9°F (1898) | 1.29 in (2019) |
| July 10 | 108.0°F (1966) | 39.9°F (1905) | 1.78 in (1977) |
| July 11 | 104.0°F (1930) | 44.1°F (1922) | 1.59 in (2017) |
| July 12 | 102.9°F (1936) | 39.9°F (1941) | 0.81 in (1934) |
| July 13 | 100.9°F (1936) | 37.9°F (1926) | 1.90 in (1966) |
| July 14 | 104.0°F (1931) | 39.9°F (1930) | 1.66 in (2013) |
| July 15 | 106.0°F (1931) | 37.9°F (1912) | 2.05 in (1900) |
| July 16 | 105.1°F (1936) | 41.0°F (1912) | 1.82 in (1952) |
| July 17 | 102.9°F (1936) | 37.9°F (1899) | 1.71 in (1969) |
| July 18 | 105.1°F (1940) | 45.0°F (1914) | 1.28 in (1989) |
| July 19 | 104.0°F (1934) | 39.9°F (1911) | 1.47 in (1990) |
| July 20 | 102.0°F (2002) | 39.9°F (1911) | 3.45 in (1897) |
| July 21 | 109.9°F (1934) | 39.9°F (1911) | 0.94 in (2017) |
| July 22 | 106.0°F (1934) | 39.0°F (1925) | 1.79 in (1981) |
| July 23 | 106.0°F (1934) | 43.0°F (1904) | 1.58 in (2011) |
| July 24 | 109.0°F (1940) | 44.1°F (1900) | 2.06 in (1934) |
| July 25 | 105.1°F (1931) | 43.0°F (1904) | 2.61 in (1953) |
| July 26 | 106.0°F (1930) | 45.0°F (1911) | 1.29 in (1963) |
| July 27 | 105.1°F (1931) | 42.1°F (2013) | 1.98 in (2025) |
| July 28 | 105.1°F (1933) | 41.0°F (1925) | 2.45 in (1953) |
| July 29 | 107.1°F (1933) | 44.1°F (1925) | 1.20 in (1950) |
| July 30 | 108.0°F (1917) | 37.0°F (1971) | 2.06 in (1956) |
| July 31 | 104.0°F (1988) | 41.0°F (1903) | 1.50 in (1917) |