Weather on April 20
Costa Mesa, CA
55 Years of Data
Avg High
73°F
Avg Low
54°F
Warmest
2009
79°F avg
Coldest
1995
55°F avg
About This Date
April 20th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 54°F. Over 55 years of records, the warmest April 20th was in 2009 (79°F average), while the coldest was 1995 (55°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 11% of April 20th dates historically, with the wettest April 20th recording 2.29" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for April 20th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 54° | 62° | — | — |
| 2024 | 75° | 58° | 66° | — | — |
| 2023 | 77° | 53° | 65° | — | — |
| 2022 | 69° | 59° | 64° | — | — |
| 2021 | 68° | 58° | 63° | — | — |
| 2020 | 71° | 62° | 67° | — | — |
| 2019 | 66° | 57° | 62° | — | — |
| 2018 | 73° | 53° | 63° | — | — |
| 2017 | 74° | 57° | 65° | — | — |
| 2016 | 85° | 59° | 72° | — | — |
| 2015 | 68° | 59° | 64° | — | — |
| 2014 | 74° | 59° | 66° | — | — |
| 2013 | 77° | 53° | 65° | — | — |
| 2012 | 74° | 56° | 65° | — | — |
| 2011 | 69° | 58° | 63° | 0.13" | — |
| 2010 | 69° | 54° | 61° | 0.1" | — |
| 2009warmest | 98° | 60° | 79° | — | — |
| 2008 | 66° | 53° | 60° | — | — |
| 2007 | 58° | 52° | 55° | 0.58" | — |
| 2006 | 76° | 53° | 64° | — | — |
| 2005 | 68° | 50° | 59° | — | — |
| 2004 | 68° | 53° | 61° | — | — |
| 2003 | 72° | 52° | 62° | — | — |
| 2002 | 67° | 52° | 59° | — | — |
| 2001 | 64° | 51° | 58° | 0.05" | — |
| 2000 | 73° | 53° | 63° | — | — |
| 1999 | 70° | 57° | 63° | — | — |
| 1998 | 84° | 54° | 69° | — | — |
| 1997 | 78° | 60° | 69° | — | — |
| 1996 | 71° | 52° | 61° | — | — |
| 1995coldest | 63° | 47° | 55° | — | — |
| 1994 | 73° | 57° | 65° | — | — |
| 1993 | 85° | 57° | 71° | — | — |
| 1992 | 84° | 52° | 68° | — | — |
| 1991 | 67° | 57° | 62° | — | — |
| 1990 | 71° | 58° | 64° | — | — |
| 1989 | 76° | 60° | 68° | — | — |
| 1988 | 65° | 51° | 58° | 2.29" | — |
| 1987 | 90° | 49° | 69° | — | — |
| 1986 | 91° | 55° | 73° | — | — |
| 1985 | 66° | 51° | 59° | — | — |
| 1984 | 74° | 51° | 62° | — | — |
| 1983 | 66° | 51° | 59° | 1.57" | — |
| 1982 | 89° | 54° | 71° | — | — |
| 1981 | 69° | 49° | 59° | — | — |
| 1980 | 77° | 56° | 66° | — | — |
| 1979 | 76° | 49° | 62° | — | — |
| 1978 | 72° | 53° | 62° | — | — |
| 1977 | 79° | 52° | 65° | — | — |
| 1976 | 83° | 52° | 67° | — | — |
| 1975 | 72° | 48° | 60° | — | — |
| 1974 | 69° | 51° | 60° | — | — |
| 1973 | 72° | 45° | 58° | — | — |
| 1972 | 71° | 43° | 57° | — | — |
| 1971 | 64° | 51° | 58° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP