July weather in Johnston, SC
The average temperature in Johnston in July is 80.9°F (68.7°F–93.0°F). Average precipitation: 4.64 inches.
July is a summer month in Johnston, and is warmer than the annual average of 62.7°F. Daily temperatures swing about 24.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 3m. For travel, July is hot.
Avg High
93.0°F
Avg Low
68.7°F
Precipitation
4.64 in
Daylight
14h 3m
July records in Johnston
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 111.0°F (2012) | 54.0°F (1979) | 1.72 in (2013) |
| July 2 | 106.0°F (2012) | 55.0°F (2008) | 2.25 in (2003) |
| July 3 | 102.9°F (1996) | 55.0°F (2008) | 1.28 in (1973) |
| July 4 | 104.0°F (1997) | 55.0°F (2007) | 2.29 in (1983) |
| July 5 | 106.0°F (1997) | 55.0°F (2007) | 2.83 in (1976) |
| July 6 | 104.0°F (1993) | 54.0°F (2007) | 3.10 in (2020) |
| July 7 | 102.9°F (1993) | 54.0°F (2007) | 2.75 in (1975) |
| July 8 | 104.0°F (1977) | 53.1°F (1979) | 1.92 in (1979) |
| July 9 | 106.0°F (1977) | 55.9°F (1979) | 1.33 in (1958) |
| July 10 | 104.0°F (2012) | 55.9°F (2006) | 1.34 in (1968) |
| July 11 | 104.0°F (1990) | 57.9°F (1963) | 2.59 in (1971) |
| July 12 | 102.0°F (1993) | 59.0°F (1963) | 1.58 in (1999) |
| July 13 | 102.9°F (1980) | 59.0°F (1978) | 3.20 in (1975) |
| July 14 | 107.1°F (1980) | 57.0°F (2001) | 1.45 in (1958) |
| July 15 | 102.9°F (1977) | 55.0°F (2001) | 2.92 in (1975) |
| July 16 | 102.0°F (1988) | 55.9°F (1967) | 1.59 in (2013) |
| July 17 | 106.0°F (1977) | 57.0°F (2004) | 4.02 in (2017) |
| July 18 | 100.9°F (1980) | 62.1°F (2004) | 1.73 in (1991) |
| July 19 | 104.0°F (2002) | 57.9°F (2009) | 3.44 in (1984) |
| July 20 | 105.1°F (1986) | 57.9°F (2009) | 1.92 in (1969) |
| July 21 | 104.0°F (1977) | 60.1°F (1987) | 2.98 in (2021) |
| July 22 | 105.1°F (1977) | 61.0°F (2001) | 1.09 in (1974) |
| July 23 | 102.9°F (1993) | 52.0°F (2007) | 1.77 in (1994) |
| July 24 | 102.9°F (2010) | 53.1°F (2007) | 3.51 in (2022) |
| July 25 | 102.0°F (1978) | 55.0°F (2007) | 1.30 in (1975) |
| July 26 | 105.1°F (2010) | 63.0°F (2005) | 1.43 in (2011) |
| July 27 | 102.9°F (2005) | 60.1°F (2019) | 1.34 in (2008) |
| July 28 | 102.9°F (2005) | 60.1°F (2019) | 1.18 in (1998) |
| July 29 | 102.0°F (2002) | 61.0°F (2004) | 1.75 in (1965) |
| July 30 | 102.9°F (2002) | 61.0°F (1979) | 1.40 in (1971) |
| July 31 | 105.1°F (2002) | 57.9°F (2017) | 1.90 in (2003) |