May weather in Sumter, SC
The average temperature in Sumter in May is 69.5°F (57.8°F–81.2°F). Average precipitation: 3.78 inches.
May is a spring month in Sumter, and is warmer than the annual average of 62.1°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 46m. For travel, May is a comfortable month to visit.
Avg High
81.2°F
Avg Low
57.8°F
Precipitation
3.78 in
Daylight
13h 46m
May records in Sumter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 93.0°F (1987) | 39.9°F (1999) | 2.00 in (1999) |
| May 2 | 93.9°F (1986) | 41.0°F (1963) | 1.41 in (1966) |
| May 3 | 93.9°F (1938) | 39.0°F (1939) | 2.01 in (1964) |
| May 4 | 96.1°F (1959) | 39.0°F (1971) | 1.53 in (1975) |
| May 5 | 93.9°F (1950) | 39.9°F (1940) | 1.43 in (2017) |
| May 6 | 95.0°F (1950) | 43.0°F (1973) | 3.56 in (1991) |
| May 7 | 93.9°F (1950) | 43.0°F (1992) | 1.99 in (1984) |
| May 8 | 95.0°F (1940) | 37.0°F (1989) | 1.70 in (1992) |
| May 9 | 95.0°F (1936) | 39.0°F (2020) | 1.68 in (1973) |
| May 10 | 96.1°F (1936) | 36.0°F (1906) | 3.19 in (1959) |
| May 11 | 93.9°F (1963) | 39.0°F (1977) | 1.31 in (2009) |
| May 12 | 96.1°F (1963) | 39.0°F (2020) | 1.22 in (2008) |
| May 13 | 96.1°F (2000) | 42.1°F (1982) | 1.84 in (2001) |
| May 14 | 97.0°F (1947) | 42.1°F (1941) | 1.16 in (1959) |
| May 15 | 96.1°F (1933) | 44.1°F (2021) | 1.07 in (1968) |
| May 16 | 97.0°F (1962) | 45.0°F (1939) | 3.28 in (1976) |
| May 17 | 97.0°F (1941) | 45.0°F (2014) | 0.81 in (1988) |
| May 18 | 97.0°F (1944) | 39.9°F (1997) | 1.66 in (1957) |
| May 19 | 97.0°F (1906) | 36.0°F (1997) | 1.28 in (2023) |
| May 20 | 98.1°F (1996) | 44.1°F (2002) | 3.60 in (1969) |
| May 21 | 98.1°F (1938) | 44.1°F (2002) | 1.72 in (1980) |
| May 22 | 98.1°F (1941) | 44.1°F (2002) | 1.57 in (1942) |
| May 23 | 100.0°F (1941) | 45.0°F (1954) | 2.94 in (1967) |
| May 24 | 100.0°F (1903) | 42.1°F (1931) | 1.70 in (1967) |
| May 25 | 104.0°F (1903) | 42.1°F (1992) | 2.21 in (1959) |
| May 26 | 100.0°F (1903) | 44.1°F (2013) | 1.06 in (1938) |
| May 27 | 99.0°F (1962) | 43.0°F (1961) | 2.00 in (2020) |
| May 28 | 99.0°F (1962) | 39.9°F (1961) | 1.61 in (1977) |
| May 29 | 100.0°F (1982) | 46.9°F (1961) | 2.88 in (1990) |
| May 30 | 98.1°F (1913) | 50.0°F (1902) | 2.17 in (1984) |
| May 31 | 100.0°F (1953) | 43.0°F (1930) | 1.08 in (1933) |