May weather in Sullivan's Island, SC
The average temperature in Sullivan's Island in May is 72.7°F (63.2°F–82.2°F). Average precipitation: 3.33 inches.
May is a spring month in Sullivan's Island, and is warmer than the annual average of 65.5°F. Daily temperatures swing about 19°F between overnight low and afternoon high. Daylight averages about 13h 41m. For travel, May is a comfortable month to visit.
Avg High
82.2°F
Avg Low
63.2°F
Precipitation
3.33 in
Daylight
13h 41m
May records in Sullivan's Island
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (1959) | 44.1°F (2006) | 4.90 in (1976) |
| May 2 | 90.0°F (1952) | 39.9°F (2005) | 0.98 in (1964) |
| May 3 | 90.0°F (1974) | 48.0°F (1971) | 1.81 in (1964) |
| May 4 | 90.0°F (2002) | 42.1°F (2005) | 1.17 in (1954) |
| May 5 | 90.0°F (1974) | 39.9°F (1973) | 1.05 in (1978) |
| May 6 | 93.9°F (1952) | 42.1°F (1973) | 0.78 in (2013) |
| May 7 | 91.0°F (2014) | 46.0°F (2005) | 1.75 in (1984) |
| May 8 | 87.1°F (2014) | 43.0°F (1989) | 1.18 in (2015) |
| May 9 | 91.0°F (2016) | 45.0°F (2007) | 1.70 in (1979) |
| May 10 | 91.9°F (1963) | 42.1°F (2007) | 2.30 in (2025) |
| May 11 | 93.9°F (1963) | 51.1°F (1972) | 0.63 in (1952) |
| May 12 | 93.0°F (2018) | 46.9°F (1989) | 1.24 in (1974) |
| May 13 | 93.9°F (1953) | 48.0°F (2009) | 1.74 in (1968) |
| May 14 | 93.9°F (1956) | 48.9°F (1971) | 0.65 in (1966) |
| May 15 | 95.0°F (1962) | 48.9°F (2021) | 1.54 in (1971) |
| May 16 | 95.0°F (1995) | 44.1°F (1971) | 2.47 in (1955) |
| May 17 | 91.9°F (1963) | 43.0°F (1971) | 1.44 in (2012) |
| May 18 | 93.9°F (1986) | 45.0°F (2009) | 1.42 in (2005) |
| May 19 | 95.0°F (1962) | 44.1°F (2009) | 1.30 in (2003) |
| May 20 | 91.0°F (2025) | 48.0°F (2009) | 1.24 in (1991) |
| May 21 | 91.9°F (1970) | 46.9°F (1994) | 1.54 in (1981) |
| May 22 | 93.9°F (1998) | 51.1°F (1993) | 3.00 in (1967) |
| May 23 | 95.0°F (1953) | 48.9°F (2005) | 1.86 in (2017) |
| May 24 | 93.9°F (1994) | 48.0°F (2005) | 6.50 in (1976) |
| May 25 | 97.0°F (1953) | 46.0°F (2005) | 2.00 in (2009) |
| May 26 | 99.0°F (1953) | 45.0°F (2005) | 1.18 in (2023) |
| May 27 | 97.0°F (1962) | 52.0°F (1961) | 2.06 in (1954) |
| May 28 | 99.0°F (2019) | 53.1°F (1961) | 1.29 in (2018) |
| May 29 | 99.0°F (2019) | 42.1°F (1971) | 3.23 in (2016) |
| May 30 | 99.0°F (2019) | 37.0°F (1971) | 1.70 in (2020) |
| May 31 | 96.1°F (1953) | 51.1°F (1984) | 1.38 in (1959) |