May weather in Union, MO
The average temperature in Union in May is 66.5°F (54.8°F–78.1°F). Average precipitation: 4.85 inches.
May is a spring month in Union, and is warmer than the annual average of 56.9°F. Daily temperatures swing about 23.3°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 5m. For travel, May is a comfortable month to visit.
Avg High
78.1°F
Avg Low
54.8°F
Precipitation
4.85 in
Daylight
14h 5m
May records in Union
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (1987) | 28.9°F (1963) | 2.79 in (1970) |
| May 2 | 91.9°F (1959) | 28.0°F (1961) | 2.00 in (1929) |
| May 3 | 91.9°F (1949) | 30.9°F (1967) | 1.58 in (1944) |
| May 4 | 93.0°F (1959) | 28.0°F (1976) | 1.31 in (1938) |
| May 5 | 93.0°F (1943) | 32.0°F (1979) | 2.23 in (2003) |
| May 6 | 91.0°F (1956) | 30.9°F (1992) | 1.20 in (1942) |
| May 7 | 93.0°F (1940) | 30.0°F (1944) | 12.15 in (2000) |
| May 8 | 93.0°F (1979) | 30.9°F (1976) | 2.80 in (1961) |
| May 9 | 91.0°F (1963) | 28.9°F (1980) | 1.21 in (1989) |
| May 10 | 91.0°F (1962) | 28.9°F (1966) | 1.51 in (1981) |
| May 11 | 88.0°F (1944) | 34.0°F (1954) | 1.26 in (1921) |
| May 12 | 91.9°F (1944) | 32.0°F (1960) | 2.82 in (1933) |
| May 13 | 91.0°F (1940) | 35.1°F (1954) | 1.49 in (2002) |
| May 14 | 91.9°F (1988) | 37.0°F (1973) | 1.84 in (1967) |
| May 15 | 91.0°F (1944) | 33.1°F (1973) | 2.50 in (1996) |
| May 16 | 95.0°F (1944) | 33.1°F (1959) | 2.12 in (1990) |
| May 17 | 93.0°F (1996) | 32.0°F (1973) | 2.02 in (1959) |
| May 18 | 93.9°F (1944) | 35.1°F (1973) | 2.98 in (1981) |
| May 19 | 93.9°F (1944) | 37.0°F (1976) | 2.20 in (1929) |
| May 20 | 91.0°F (1941) | 36.0°F (1954) | 1.10 in (1919) |
| May 21 | 91.9°F (1941) | 33.1°F (1954) | 1.64 in (1947) |
| May 22 | 91.9°F (1941) | 37.9°F (1997) | 2.53 in (1983) |
| May 23 | 91.0°F (1939) | 34.0°F (1963) | 1.58 in (1927) |
| May 24 | 91.9°F (1939) | 37.9°F (1961) | 2.22 in (1918) |
| May 25 | 91.0°F (1944) | 37.9°F (1949) | 1.77 in (1995) |
| May 26 | 97.0°F (1953) | 37.0°F (1979) | 2.10 in (1984) |
| May 27 | 91.9°F (1978) | 33.1°F (1961) | 2.61 in (2000) |
| May 28 | 93.9°F (1991) | 39.9°F (1971) | 2.72 in (1964) |
| May 29 | 93.0°F (1953) | 37.9°F (1965) | 1.10 in (1967) |
| May 30 | 91.9°F (1942) | 35.1°F (1947) | 1.86 in (1944) |
| May 31 | 93.9°F (1944) | 39.9°F (1984) | 3.20 in (1927) |