April weather in Costa Mesa, CA
The average temperature in Costa Mesa in April is 62.6°F (54.9°F–70.2°F). Average precipitation: 0.52 inches.
April is a spring month in Costa Mesa, and is cooler than the annual average of 64.9°F. Daily temperatures swing about 15.3°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 51m. For travel, April is one of the best months of the year to visit.
Avg High
70.2°F
Avg Low
54.9°F
Precipitation
0.52 in
Daylight
12h 51m
April records in Costa Mesa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 91.0°F (2021) | 46.9°F (2010) | 0.49 in (2004) |
| April 2 | 77.0°F (2005) | 43.0°F (1999) | 0.12 in (2014) |
| April 3 | 84.0°F (2026) | 48.9°F (1999) | 0.02 in (2008) |
| April 4 | 86.0°F (2026) | 44.1°F (1999) | 0.50 in (2006) |
| April 5 | 81.0°F (2017) | 45.0°F (1999) | 0.45 in (2006) |
| April 6 | 84.9°F (2005) | 46.0°F (2024) | 0.76 in (2020) |
| April 7 | 102.9°F (2022) | 46.9°F (1999) | 0.54 in (2020) |
| April 8 | 100.9°F (2022) | 44.1°F (2001) | 0.14 in (2020) |
| April 9 | 86.0°F (2018) | 44.1°F (1999) | 0.76 in (2020) |
| April 10 | 88.0°F (2018) | 41.0°F (1999) | 0.35 in (2020) |
| April 11 | 82.9°F (2008) | 48.0°F (1999) | 0.69 in (1999) |
| April 12 | 97.0°F (2008) | 45.0°F (1999) | 0.82 in (2010) |
| April 13 | 93.9°F (2008) | 48.9°F (2001) | 0.41 in (2012) |
| April 14 | 84.0°F (2018) | 46.9°F (2012) | 0.10 in (2024) |
| April 15 | 82.0°F (2011) | 48.0°F (2009) | 0.03 in (2002) |
| April 16 | 86.0°F (1999) | 48.9°F (2003) | 0.00 in (1999) |
| April 17 | 90.0°F (2016) | 48.9°F (2001) | 0.59 in (2000) |
| April 18 | 89.1°F (2021) | 50.0°F (2006) | 0.09 in (2000) |
| April 19 | 93.9°F (2009) | 48.9°F (2007) | 0.05 in (2018) |
| April 20 | 98.1°F (2009) | 50.0°F (2005) | 0.23 in (2007) |
| April 21 | 88.0°F (2009) | 48.9°F (2007) | 0.11 in (2001) |
| April 22 | 84.9°F (2017) | 48.0°F (2001) | 0.19 in (2010) |
| April 23 | 88.0°F (2020) | 48.0°F (2010) | 0.21 in (2006) |
| April 24 | 95.0°F (2020) | 51.1°F (2006) | 0.31 in (2005) |
| April 25 | 84.9°F (2020) | 53.1°F (2008) | 0.18 in (2012) |
| April 26 | 90.0°F (2004) | 51.1°F (2009) | 0.20 in (2025) |
| April 27 | 99.0°F (2008) | 53.1°F (2003) | 0.01 in (2010) |
| April 28 | 93.0°F (2008) | 50.0°F (2002) | 0.77 in (2005) |
| April 29 | 97.0°F (2014) | 48.9°F (1999) | 0.03 in (2019) |
| April 30 | 93.9°F (2014) | 50.0°F (2010) | 0.01 in (2016) |