May weather in Williams Bay, WI
The average temperature in Williams Bay in May is 60.0°F (48.4°F–71.6°F). Average precipitation: 4.12 inches.
May is a spring month in Williams Bay, and is warmer than the annual average of 49.4°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 26m. For travel, May is a comfortable month to visit.
Avg High
71.6°F
Avg Low
48.4°F
Precipitation
4.12 in
Daylight
14h 26m
May records in Williams Bay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (1952) | 27.0°F (1961) | 1.00 in (2022) |
| May 2 | 86.0°F (1959) | 30.0°F (1950) | 1.28 in (1987) |
| May 3 | 87.1°F (1955) | 27.0°F (1971) | 0.99 in (1945) |
| May 4 | 91.9°F (1952) | 28.9°F (1954) | 1.73 in (1990) |
| May 5 | 91.9°F (1959) | 30.0°F (1973) | 1.30 in (1976) |
| May 6 | 84.0°F (1949) | 27.0°F (1970) | 0.91 in (1960) |
| May 7 | 86.0°F (1965) | 27.0°F (1989) | 1.35 in (1998) |
| May 8 | 86.0°F (1963) | 28.0°F (1947) | 1.57 in (2024) |
| May 9 | 88.0°F (1993) | 26.1°F (1947) | 2.19 in (2000) |
| May 10 | 88.0°F (1993) | 30.0°F (1983) | 2.28 in (1948) |
| May 11 | 88.0°F (1987) | 32.0°F (1949) | 1.57 in (1967) |
| May 12 | 88.0°F (1961) | 30.9°F (1960) | 1.37 in (1982) |
| May 13 | 89.1°F (1961) | 30.0°F (1996) | 1.63 in (1978) |
| May 14 | 90.0°F (1991) | 34.0°F (1945) | 1.37 in (1945) |
| May 15 | 90.0°F (1991) | 34.0°F (1953) | 1.36 in (1946) |
| May 16 | 91.0°F (1962) | 33.1°F (1957) | 0.94 in (1974) |
| May 17 | 90.0°F (1962) | 33.1°F (1994) | 1.31 in (1986) |
| May 18 | 93.0°F (1962) | 32.0°F (2002) | 2.99 in (2000) |
| May 19 | 91.9°F (1975) | 36.0°F (1945) | 2.53 in (1959) |
| May 20 | 90.0°F (1972) | 36.0°F (1954) | 2.20 in (1996) |
| May 21 | 90.0°F (1972) | 28.9°F (2002) | 1.10 in (2025) |
| May 22 | 93.9°F (1956) | 33.1°F (1971) | 1.26 in (1974) |
| May 23 | 88.0°F (1977) | 30.9°F (1958) | 1.71 in (1952) |
| May 24 | 90.0°F (1977) | 34.0°F (1956) | 1.65 in (1955) |
| May 25 | 88.0°F (1977) | 32.0°F (1992) | 2.69 in (1984) |
| May 26 | 91.9°F (1985) | 32.0°F (1961) | 1.58 in (2022) |
| May 27 | 93.0°F (1978) | 33.1°F (1992) | 0.99 in (1973) |
| May 28 | 93.9°F (1991) | 34.0°F (1949) | 1.60 in (1945) |
| May 29 | 93.0°F (1991) | 33.1°F (1965) | 1.26 in (1947) |
| May 30 | 93.9°F (1988) | 34.0°F (1965) | 0.94 in (2019) |
| May 31 | 93.9°F (1988) | 37.0°F (1990) | 2.53 in (1958) |