May weather in Hartford, WI
The average temperature in Hartford in May is 55.5°F (44.3°F–66.7°F). Average precipitation: 3.82 inches. Average snowfall is 0.3 inches.
May is a spring month in Hartford, and is warmer than the annual average of 44.7°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 30m. For travel, May is a comfortable month to visit.
Avg High
66.7°F
Avg Low
44.3°F
Precipitation
3.82 in
Snow
0.3 in
May records in Hartford
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.0°F (2001) | 19.9°F (1978) | 1.55 in (2003) |
| May 2 | 88.0°F (1959) | 24.1°F (1986) | 0.85 in (2018) |
| May 3 | 87.1°F (1959) | 24.1°F (1900) | 1.35 in (2013) |
| May 4 | 84.9°F (1980) | 25.0°F (2005) | 2.01 in (2021) |
| May 5 | 87.1°F (1959) | 27.0°F (1900) | 0.94 in (1964) |
| May 6 | 87.1°F (1959) | 25.0°F (1970) | 1.60 in (1960) |
| May 7 | 84.9°F (1965) | 25.0°F (1974) | 0.78 in (1960) |
| May 8 | 84.9°F (1965) | 28.0°F (1976) | 1.23 in (2024) |
| May 9 | 84.0°F (1979) | 23.0°F (2020) | 2.20 in (1990) |
| May 10 | 84.9°F (1987) | 21.9°F (1966) | 1.14 in (2013) |
| May 11 | 88.0°F (2022) | 28.0°F (1990) | 1.20 in (1967) |
| May 12 | 88.0°F (1900) | 25.0°F (1981) | 1.52 in (1970) |
| May 13 | 90.0°F (2022) | 27.0°F (1971) | 2.52 in (1978) |
| May 14 | 89.1°F (2022) | 28.9°F (2013) | 1.16 in (2009) |
| May 15 | 88.0°F (2007) | 30.0°F (1984) | 1.01 in (2001) |
| May 16 | 88.0°F (1962) | 30.0°F (1997) | 2.18 in (1974) |
| May 17 | 87.1°F (1962) | 26.1°F (1983) | 1.20 in (1999) |
| May 18 | 90.0°F (1962) | 28.0°F (2002) | 2.73 in (2000) |
| May 19 | 89.1°F (1962) | 30.0°F (2008) | 1.40 in (2000) |
| May 20 | 90.0°F (1975) | 3.0°F (1899) | 1.42 in (2004) |
| May 21 | 89.1°F (2012) | 28.0°F (2002) | 1.24 in (2025) |
| May 22 | 89.1°F (1956) | 32.0°F (1971) | 2.48 in (2004) |
| May 23 | 87.1°F (1975) | 28.9°F (1963) | 0.78 in (2004) |
| May 24 | 88.0°F (2010) | 28.9°F (1979) | 1.34 in (1955) |
| May 25 | 91.0°F (2010) | 30.9°F (1897) | 1.63 in (2024) |
| May 26 | 89.1°F (1985) | 28.0°F (1992) | 0.90 in (1975) |
| May 27 | 89.1°F (1967) | 30.0°F (1961) | 1.54 in (1955) |
| May 28 | 93.0°F (2018) | 33.1°F (2008) | 1.25 in (1896) |
| May 29 | 90.0°F (2006) | 30.9°F (1965) | 1.93 in (1989) |
| May 30 | 93.9°F (1999) | 32.0°F (1984) | 1.62 in (1899) |
| May 31 | 93.0°F (1999) | 28.9°F (1897) | 2.02 in (2018) |