August weather in El Cajon, CA
The average temperature in El Cajon in August is 76.6°F (64.7°F–88.6°F). Average precipitation: 0.02 inches.
August is a summer month in El Cajon, and is warmer than the annual average of 65.1°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 13h 13m. For travel, August is hot.
Avg High
88.6°F
Avg Low
64.7°F
Precipitation
0.02 in
Daylight
13h 13m
August records in El Cajon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (2000) | 57.0°F (2010) | 0.01 in (1991) |
| August 2 | 100.0°F (2021) | 57.0°F (1985) | 0.01 in (2014) |
| August 3 | 98.1°F (1997) | 57.9°F (1994) | 0.28 in (2014) |
| August 4 | 97.0°F (2024) | 57.0°F (1985) | 0.10 in (2006) |
| August 5 | 100.9°F (1983) | 57.0°F (1985) | 0.00 in (1980) |
| August 6 | 104.0°F (1983) | 50.0°F (2000) | 0.00 in (1980) |
| August 7 | 100.0°F (1983) | 59.0°F (2013) | 0.00 in (1980) |
| August 8 | 100.0°F (1983) | 57.9°F (2020) | 0.00 in (1980) |
| August 9 | 98.1°F (1982) | 54.0°F (2010) | 0.02 in (2022) |
| August 10 | 102.9°F (2003) | 54.0°F (2010) | 0.00 in (1980) |
| August 11 | 102.9°F (2000) | 55.9°F (2013) | 0.05 in (2024) |
| August 12 | 100.9°F (1994) | 57.0°F (1999) | 0.00 in (1980) |
| August 13 | 107.1°F (1994) | 55.9°F (1988) | 0.10 in (1992) |
| August 14 | 105.1°F (1994) | 55.9°F (1988) | 0.00 in (1980) |
| August 15 | 102.9°F (2015) | 55.9°F (1988) | 0.00 in (1980) |
| August 16 | 104.0°F (2016) | 57.9°F (2010) | 0.03 in (1999) |
| August 17 | 102.0°F (1992) | 60.1°F (2009) | 0.13 in (1986) |
| August 18 | 102.0°F (2020) | 60.1°F (2003) | 0.09 in (1983) |
| August 19 | 100.0°F (1986) | 60.1°F (1999) | 0.00 in (1980) |
| August 20 | 100.0°F (2000) | 55.0°F (2000) | 1.20 in (2023) |
| August 21 | 100.9°F (1982) | 52.0°F (2000) | 0.69 in (2023) |
| August 22 | 98.1°F (1981) | 57.0°F (1989) | 0.00 in (1980) |
| August 23 | 98.1°F (1985) | 54.0°F (1983) | 0.00 in (1980) |
| August 24 | 102.9°F (1981) | 57.9°F (1987) | 0.00 in (1980) |
| August 25 | 105.1°F (1985) | 55.0°F (2024) | 0.01 in (2015) |
| August 26 | 105.1°F (1981) | 55.9°F (1987) | 0.02 in (1994) |
| August 27 | 106.0°F (2009) | 55.9°F (1990) | 0.00 in (1980) |
| August 28 | 102.0°F (1995) | 55.9°F (1990) | 0.08 in (2025) |
| August 29 | 107.1°F (2009) | 55.9°F (1990) | 0.00 in (1980) |
| August 30 | 104.0°F (1995) | 55.9°F (1980) | 0.00 in (1980) |
| August 31 | 106.0°F (2002) | 55.9°F (2010) | 0.00 in (1980) |