May weather in Union, OH
The average temperature in Union in May is 64.0°F (53.8°F–74.2°F). Average precipitation: 4.51 inches.
May is a spring month in Union, and is warmer than the annual average of 53.9°F. Daily temperatures swing about 20.4°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 12m. For travel, May is a comfortable month to visit.
Avg High
74.2°F
Avg Low
53.8°F
Precipitation
4.51 in
Daylight
14h 12m
May records in Union
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 88.0°F (1951) | 26.1°F (1963) | 1.86 in (1985) |
| May 2 | 87.1°F (1951) | 30.9°F (1961) | 1.66 in (1997) |
| May 3 | 84.9°F (1959) | 32.0°F (2005) | 1.38 in (1958) |
| May 4 | 88.0°F (1949) | 30.9°F (1957) | 2.23 in (1990) |
| May 5 | 90.0°F (1952) | 34.0°F (1957) | 1.16 in (2003) |
| May 6 | 89.1°F (1949) | 30.9°F (1968) | 1.16 in (2025) |
| May 7 | 87.1°F (2015) | 28.0°F (1974) | 1.36 in (1998) |
| May 8 | 87.1°F (1965) | 32.0°F (1976) | 1.20 in (1969) |
| May 9 | 88.0°F (1963) | 28.2°F (2020) | 1.30 in (2024) |
| May 10 | 88.0°F (1993) | 28.9°F (1966) | 1.38 in (1951) |
| May 11 | 87.1°F (1979) | 35.1°F (1949) | 1.30 in (1968) |
| May 12 | 87.1°F (1982) | 34.0°F (2020) | 1.45 in (2002) |
| May 13 | 88.0°F (1982) | 33.1°F (1996) | 1.23 in (1957) |
| May 14 | 89.1°F (1962) | 36.0°F (1996) | 1.02 in (1995) |
| May 15 | 89.1°F (1962) | 35.1°F (1973) | 1.91 in (2007) |
| May 16 | 91.0°F (1962) | 33.1°F (1959) | 1.01 in (1990) |
| May 17 | 91.9°F (1962) | 35.1°F (1973) | 2.20 in (1974) |
| May 18 | 93.0°F (1962) | 35.1°F (1973) | 1.88 in (1995) |
| May 19 | 91.9°F (1962) | 33.1°F (2002) | 1.68 in (2020) |
| May 20 | 90.0°F (1962) | 37.9°F (1981) | 1.75 in (1984) |
| May 21 | 90.0°F (1975) | 37.9°F (1954) | 1.75 in (2014) |
| May 22 | 89.1°F (1964) | 34.0°F (2002) | 1.04 in (1953) |
| May 23 | 88.0°F (1965) | 34.0°F (1963) | 3.17 in (1989) |
| May 24 | 90.0°F (1975) | 39.9°F (1956) | 0.92 in (2017) |
| May 25 | 90.0°F (1975) | 39.0°F (1949) | 1.50 in (2011) |
| May 26 | 91.0°F (2012) | 37.0°F (1983) | 1.78 in (1989) |
| May 27 | 91.0°F (2012) | 33.1°F (1961) | 2.27 in (2004) |
| May 28 | 91.9°F (2012) | 39.0°F (2008) | 0.71 in (1967) |
| May 29 | 89.1°F (1962) | 37.9°F (1965) | 1.01 in (1982) |
| May 30 | 90.0°F (1953) | 37.0°F (1984) | 1.67 in (2004) |
| May 31 | 91.9°F (1988) | 43.0°F (1966) | 1.75 in (1997) |