May weather in Monona, WI
The average temperature in Monona in May is 58.3°F (47.4°F–69.2°F). Average precipitation: 4.55 inches.
May is a spring month in Monona, and is warmer than the annual average of 47.2°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 28m. For travel, May is a comfortable month to visit.
Avg High
69.2°F
Avg Low
47.4°F
Precipitation
4.55 in
Daylight
14h 28m
May records in Monona
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2013) | 24.1°F (1979) | 2.12 in (2025) |
| May 2 | 89.1°F (2021) | 23.0°F (1978) | 3.74 in (2000) |
| May 3 | 84.9°F (2021) | 25.0°F (1986) | 1.10 in (2025) |
| May 4 | 84.0°F (1980) | 26.1°F (2011) | 1.41 in (2012) |
| May 5 | 86.0°F (1980) | 28.0°F (1983) | 0.66 in (2003) |
| May 6 | 88.0°F (1980) | 24.1°F (1992) | 1.17 in (1982) |
| May 7 | 84.0°F (2016) | 21.9°F (1989) | 1.12 in (2009) |
| May 8 | 84.9°F (2023) | 26.1°F (1976) | 1.36 in (1973) |
| May 9 | 87.1°F (1979) | 24.1°F (1983) | 1.54 in (1996) |
| May 10 | 89.1°F (1979) | 25.0°F (1977) | 1.85 in (1990) |
| May 11 | 90.0°F (2022) | 28.0°F (1990) | 1.70 in (1978) |
| May 12 | 91.0°F (2022) | 25.0°F (1981) | 0.93 in (2003) |
| May 13 | 93.9°F (2022) | 27.0°F (1996) | 1.70 in (1978) |
| May 14 | 91.9°F (2022) | 33.1°F (1984) | 1.30 in (1978) |
| May 15 | 90.0°F (1991) | 28.9°F (2016) | 0.97 in (1985) |
| May 16 | 89.1°F (2025) | 26.1°F (1997) | 1.24 in (1976) |
| May 17 | 88.0°F (1992) | 30.9°F (1973) | 2.25 in (1999) |
| May 18 | 89.1°F (1996) | 28.0°F (2002) | 2.45 in (2000) |
| May 19 | 89.1°F (1996) | 32.0°F (2002) | 1.55 in (2000) |
| May 20 | 91.0°F (1975) | 30.0°F (1981) | 1.66 in (2018) |
| May 21 | 91.9°F (1977) | 28.0°F (1997) | 1.23 in (2001) |
| May 22 | 89.1°F (1992) | 30.0°F (1997) | 3.10 in (2004) |
| May 23 | 91.0°F (1975) | 32.0°F (1985) | 3.20 in (2004) |
| May 24 | 90.0°F (1975) | 34.0°F (2013) | 0.58 in (1975) |
| May 25 | 91.0°F (2010) | 28.0°F (1988) | 2.00 in (2024) |
| May 26 | 89.1°F (2012) | 28.9°F (1983) | 1.44 in (2022) |
| May 27 | 91.0°F (1977) | 27.0°F (1992) | 1.02 in (1985) |
| May 28 | 95.0°F (2018) | 33.1°F (1989) | 1.34 in (1995) |
| May 29 | 91.9°F (1991) | 28.9°F (1984) | 1.23 in (2020) |
| May 30 | 93.0°F (1991) | 28.9°F (1996) | 1.94 in (1975) |
| May 31 | 89.1°F (1988) | 32.0°F (1984) | 0.76 in (2018) |