May weather in Onalaska, WI
The average temperature in Onalaska in May is 61.0°F (50.1°F–72.0°F). Average precipitation: 4.33 inches.
May is a spring month in Onalaska, and is warmer than the annual average of 48.8°F. Daily temperatures swing about 21.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 33m. For travel, May is a comfortable month to visit.
Avg High
72.0°F
Avg Low
50.1°F
Precipitation
4.33 in
Daylight
14h 33m
May records in Onalaska
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 93.9°F (1992) | 27.0°F (1945) | 1.17 in (1993) |
| May 2 | 91.9°F (1959) | 27.0°F (2005) | 1.59 in (2001) |
| May 3 | 90.0°F (1949) | 26.1°F (1971) | 1.22 in (2018) |
| May 4 | 91.0°F (1952) | 28.9°F (1973) | 1.18 in (1982) |
| May 5 | 90.0°F (1949) | 30.9°F (1967) | 1.04 in (1991) |
| May 6 | 91.0°F (2016) | 26.1°F (1989) | 1.56 in (1960) |
| May 7 | 88.0°F (1970) | 30.0°F (1947) | 1.31 in (1998) |
| May 8 | 84.9°F (1957) | 28.0°F (1947) | 1.70 in (2006) |
| May 9 | 91.9°F (1987) | 26.1°F (1945) | 1.54 in (1990) |
| May 10 | 89.1°F (2007) | 27.0°F (1966) | 0.92 in (1974) |
| May 11 | 90.0°F (2022) | 28.0°F (1946) | 1.06 in (1999) |
| May 12 | 96.1°F (2022) | 30.2°F (2020) | 0.95 in (1970) |
| May 13 | 90.0°F (2022) | 30.0°F (1953) | 1.35 in (2010) |
| May 14 | 91.9°F (2007) | 32.0°F (2016) | 1.44 in (1957) |
| May 15 | 91.0°F (2001) | 30.0°F (1983) | 1.20 in (1976) |
| May 16 | 88.0°F (1962) | 33.1°F (1942) | 2.71 in (1960) |
| May 17 | 91.9°F (1998) | 33.1°F (1940) | 2.87 in (2000) |
| May 18 | 91.9°F (1998) | 32.0°F (1945) | 1.55 in (1971) |
| May 19 | 91.9°F (1975) | 35.1°F (1981) | 1.44 in (1990) |
| May 20 | 91.9°F (1948) | 34.0°F (2002) | 1.70 in (2025) |
| May 21 | 91.9°F (1970) | 33.1°F (1997) | 3.26 in (1945) |
| May 22 | 93.0°F (1972) | 33.1°F (1967) | 1.20 in (2011) |
| May 23 | 91.9°F (1972) | 35.1°F (1963) | 1.62 in (1981) |
| May 24 | 93.0°F (2010) | 36.0°F (1979) | 1.31 in (1971) |
| May 25 | 91.0°F (1980) | 34.0°F (1979) | 1.53 in (1965) |
| May 26 | 93.9°F (1967) | 35.1°F (1949) | 1.64 in (2024) |
| May 27 | 98.1°F (2018) | 30.0°F (1971) | 2.36 in (1956) |
| May 28 | 93.9°F (1998) | 32.0°F (1947) | 1.21 in (1955) |
| May 29 | 96.1°F (2018) | 32.0°F (1965) | 1.71 in (1991) |
| May 30 | 93.0°F (2010) | 37.9°F (1965) | 2.10 in (1979) |
| May 31 | 93.9°F (1988) | 37.9°F (1966) | 1.44 in (2016) |