July weather in Costa Mesa, CA
The average temperature in Costa Mesa in July is 72.5°F (66.2°F–78.9°F). Average precipitation: 0.04 inches.
July is a summer month in Costa Mesa, and is warmer than the annual average of 64.9°F. Daily temperatures swing about 12.7°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 14h 2m. For travel, July is one of the best months of the year to visit.
Avg High
78.9°F
Avg Low
66.2°F
Precipitation
0.04 in
Daylight
14h 2m
July records in Costa Mesa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 89.1°F (2013) | 60.1°F (2005) | 0.00 in (1999) |
| July 2 | 84.9°F (2011) | 61.0°F (2004) | 0.00 in (1999) |
| July 3 | 84.0°F (2003) | 61.0°F (1999) | 0.00 in (1999) |
| July 4 | 84.9°F (2008) | 60.1°F (2005) | 0.00 in (1999) |
| July 5 | 90.0°F (2018) | 61.0°F (1999) | 0.00 in (1999) |
| July 6 | 108.0°F (2018) | 60.1°F (2009) | 0.00 in (1999) |
| July 7 | 97.0°F (2018) | 61.0°F (2012) | 0.01 in (1999) |
| July 8 | 91.9°F (2018) | 59.0°F (2012) | 0.09 in (1999) |
| July 9 | 91.9°F (2018) | 61.0°F (2009) | 0.02 in (1999) |
| July 10 | 86.0°F (2021) | 62.1°F (2009) | 0.03 in (1999) |
| July 11 | 91.0°F (2020) | 62.1°F (2001) | 0.01 in (1999) |
| July 12 | 88.0°F (2020) | 62.1°F (2001) | 0.04 in (2012) |
| July 13 | 87.1°F (2006) | 61.0°F (2001) | 0.12 in (2012) |
| July 14 | 89.1°F (2006) | 62.1°F (2001) | 0.03 in (1999) |
| July 15 | 91.9°F (2006) | 62.1°F (2001) | 0.31 in (1999) |
| July 16 | 91.0°F (2010) | 63.0°F (1999) | 0.08 in (1999) |
| July 17 | 86.0°F (2006) | 61.0°F (2000) | 0.12 in (1999) |
| July 18 | 87.1°F (2021) | 63.0°F (1999) | 0.18 in (2015) |
| July 19 | 88.0°F (2015) | 63.0°F (2020) | 0.25 in (2015) |
| July 20 | 91.0°F (2005) | 62.1°F (1999) | 0.00 in (1999) |
| July 21 | 89.1°F (2006) | 62.1°F (1999) | 0.02 in (2015) |
| July 22 | 99.0°F (2006) | 60.1°F (1999) | 0.00 in (1999) |
| July 23 | 90.0°F (2019) | 61.0°F (1999) | 0.15 in (2006) |
| July 24 | 97.0°F (2006) | 59.0°F (1999) | 0.00 in (1999) |
| July 25 | 93.0°F (2019) | 60.1°F (1999) | 0.03 in (2019) |
| July 26 | 91.9°F (2006) | 62.1°F (1999) | 0.11 in (2013) |
| July 27 | 89.1°F (2014) | 62.1°F (1999) | 0.00 in (1999) |
| July 28 | 91.9°F (2014) | 57.0°F (2007) | 0.00 in (1999) |
| July 29 | 91.0°F (2018) | 62.1°F (1999) | 0.01 in (2003) |
| July 30 | 86.0°F (2014) | 61.0°F (2020) | 0.07 in (2003) |
| July 31 | 89.1°F (2018) | 62.1°F (1999) | 0.03 in (2011) |