May weather in Watertown, WI
The average temperature in Watertown in May is 57.3°F (46.9°F–67.8°F). Average precipitation: 4.19 inches.
May is a spring month in Watertown, and is warmer than the annual average of 46.4°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 29m. For travel, May is a comfortable month to visit.
Avg High
67.8°F
Avg Low
46.9°F
Precipitation
4.19 in
Snow
0.1 in
May records in Watertown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.9°F (1952) | 25.0°F (1909) | 1.89 in (2003) |
| May 2 | 88.0°F (1959) | 25.0°F (1909) | 1.27 in (1926) |
| May 3 | 88.0°F (1949) | 26.1°F (1908) | 1.05 in (2013) |
| May 4 | 90.0°F (1952) | 25.0°F (1907) | 1.62 in (2021) |
| May 5 | 91.0°F (1949) | 27.0°F (1957) | 1.35 in (1912) |
| May 6 | 90.0°F (1934) | 27.0°F (1970) | 1.34 in (1956) |
| May 7 | 86.0°F (1896) | 26.1°F (1989) | 2.61 in (1960) |
| May 8 | 86.0°F (1896) | 28.0°F (1989) | 2.60 in (1934) |
| May 9 | 90.0°F (1934) | 23.0°F (1966) | 0.92 in (2019) |
| May 10 | 87.1°F (1896) | 24.1°F (1966) | 2.05 in (2013) |
| May 11 | 88.0°F (2022) | 21.9°F (1907) | 1.78 in (1967) |
| May 12 | 87.1°F (1900) | 28.0°F (1938) | 1.51 in (2006) |
| May 13 | 91.0°F (2022) | 30.0°F (1938) | 1.51 in (2014) |
| May 14 | 90.0°F (2022) | 25.0°F (1895) | 1.57 in (1978) |
| May 15 | 88.0°F (1906) | 26.1°F (1895) | 1.66 in (1941) |
| May 16 | 90.0°F (1977) | 30.0°F (1895) | 0.94 in (1976) |
| May 17 | 89.1°F (1906) | 33.1°F (1915) | 1.78 in (1999) |
| May 18 | 91.0°F (1977) | 28.9°F (2002) | 3.51 in (2000) |
| May 19 | 91.9°F (1975) | 30.0°F (1894) | 2.37 in (1933) |
| May 20 | 90.0°F (1977) | 30.0°F (1895) | 1.30 in (1913) |
| May 21 | 89.1°F (1972) | 30.0°F (1907) | 1.26 in (2025) |
| May 22 | 91.0°F (1925) | 10.9°F (1895) | 3.26 in (2004) |
| May 23 | 89.1°F (1975) | 28.9°F (1917) | 1.78 in (1920) |
| May 24 | 91.0°F (1950) | 34.0°F (1917) | 2.13 in (1966) |
| May 25 | 90.0°F (2010) | 33.1°F (1901) | 1.60 in (1926) |
| May 26 | 91.0°F (1978) | 30.0°F (1901) | 0.94 in (1915) |
| May 27 | 91.9°F (1978) | 32.0°F (1907) | 1.57 in (2022) |
| May 28 | 93.0°F (2018) | 32.0°F (1906) | 1.82 in (1973) |
| May 29 | 93.9°F (1991) | 30.9°F (1965) | 1.75 in (1947) |
| May 30 | 93.0°F (1939) | 33.1°F (1894) | 2.15 in (1943) |
| May 31 | 97.0°F (1934) | 30.0°F (1894) | 1.61 in (1958) |