July weather in Sullivan's Island, SC
The average temperature in Sullivan's Island in July is 82.0°F (73.0°F–91.1°F). Average precipitation: 5.97 inches.
July is a summer month in Sullivan's Island, and is warmer than the annual average of 65.5°F. Daily temperatures swing about 18.1°F between overnight low and afternoon high. Daylight averages about 13h 58m. For travel, July is a wet month.
Avg High
91.1°F
Avg Low
73.0°F
Precipitation
5.97 in
Daylight
13h 58m
July records in Sullivan's Island
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 100.0°F (1990) | 57.0°F (1999) | 2.20 in (2020) |
| July 2 | 100.0°F (2019) | 62.1°F (1988) | 3.74 in (1966) |
| July 3 | 100.0°F (2019) | 61.0°F (1971) | 1.98 in (1989) |
| July 4 | 99.0°F (2019) | 63.0°F (2021) | 2.32 in (1959) |
| July 5 | 98.1°F (1993) | 64.0°F (1968) | 1.00 in (1972) |
| July 6 | 100.9°F (1990) | 61.0°F (1973) | 1.32 in (1998) |
| July 7 | 99.0°F (2004) | 64.0°F (1970) | 1.90 in (1967) |
| July 8 | 98.1°F (2004) | 64.0°F (1971) | 2.15 in (1967) |
| July 9 | 100.9°F (2010) | 60.1°F (2009) | 2.10 in (2009) |
| July 10 | 98.1°F (1992) | 64.0°F (1978) | 3.35 in (1954) |
| July 11 | 98.1°F (1992) | 64.0°F (2009) | 1.40 in (2019) |
| July 12 | 98.1°F (1966) | 59.0°F (1985) | 3.17 in (2012) |
| July 13 | 100.0°F (1992) | 64.9°F (2008) | 1.99 in (2012) |
| July 14 | 99.0°F (1956) | 66.0°F (1997) | 2.06 in (2003) |
| July 15 | 99.0°F (2004) | 64.9°F (1978) | 1.32 in (1960) |
| July 16 | 99.0°F (1983) | 69.1°F (1967) | 3.80 in (1978) |
| July 17 | 99.0°F (1993) | 66.0°F (2008) | 4.80 in (1964) |
| July 18 | 98.1°F (1983) | 64.0°F (2007) | 2.85 in (1984) |
| July 19 | 99.0°F (1986) | 66.0°F (1997) | 1.05 in (2019) |
| July 20 | 99.0°F (1986) | 63.0°F (2007) | 6.05 in (1953) |
| July 21 | 100.0°F (2002) | 66.9°F (2006) | 3.42 in (2001) |
| July 22 | 100.0°F (1983) | 64.0°F (1984) | 3.18 in (1996) |
| July 23 | 98.1°F (1952) | 64.9°F (2007) | 2.00 in (1983) |
| July 24 | 100.0°F (1983) | 64.9°F (2019) | 2.10 in (1957) |
| July 25 | 98.1°F (2011) | 59.0°F (1985) | 2.02 in (1985) |
| July 26 | 100.9°F (2010) | 62.1°F (1973) | 3.28 in (1951) |
| July 27 | 100.0°F (1999) | 66.0°F (1973) | 3.10 in (2011) |
| July 28 | 99.0°F (1999) | 64.0°F (1988) | 2.10 in (2001) |
| July 29 | 99.0°F (1993) | 59.0°F (1970) | 2.70 in (1971) |
| July 30 | 100.0°F (1961) | 61.0°F (2007) | 2.00 in (2018) |
| July 31 | 98.1°F (2002) | 64.9°F (1966) | 2.23 in (1994) |