Weather on April 18
Costa Mesa, CA
55 Years of Data
Avg High
72°F
Avg Low
54°F
Warmest
2016
72°F avg
Coldest
1971
55°F avg
About This Date
April 18th in Costa Mesa, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 54°F. Over 55 years of records, the warmest April 18th was in 2016 (72°F average), while the coldest was 1971 (55°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 18th dates historically, with the wettest April 18th recording 1.73" of rain. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for April 18th in Costa Mesa, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 57° | 61° | — | — |
| 2024 | 74° | — | — | — | — |
| 2023 | 65° | 55° | 60° | — | — |
| 2022 | 74° | 57° | 65° | — | — |
| 2021 | 89° | 55° | 72° | — | — |
| 2020 | 70° | 62° | 66° | — | — |
| 2019 | 78° | 56° | 67° | — | — |
| 2018 | 70° | 51° | 60° | — | — |
| 2017 | 75° | 61° | 68° | — | — |
| 2016warmest | 87° | 58° | 72° | — | — |
| 2015 | 74° | 55° | 64° | — | — |
| 2014 | 71° | 61° | 66° | — | — |
| 2013 | 80° | 51° | 66° | — | — |
| 2012 | 71° | 56° | 63° | — | — |
| 2011 | 66° | 59° | 63° | — | — |
| 2010 | 72° | 53° | 62° | — | — |
| 2009 | 78° | 51° | 65° | — | — |
| 2008 | 77° | 54° | 65° | — | — |
| 2007 | 69° | 52° | 60° | — | — |
| 2006 | 74° | 50° | 62° | — | — |
| 2005 | 64° | 57° | 61° | — | — |
| 2004 | 66° | 52° | 59° | — | — |
| 2003 | 64° | 54° | 59° | — | — |
| 2002 | 65° | 51° | 58° | — | — |
| 2001 | 69° | 53° | 61° | — | — |
| 2000 | 65° | 52° | 58° | 0.23" | — |
| 1999 | 85° | 55° | 70° | — | — |
| 1998 | 78° | 50° | 64° | — | — |
| 1997 | 73° | 56° | 64° | — | — |
| 1996 | 71° | 57° | 64° | 0.99" | — |
| 1995 | 64° | 49° | 56° | 0.43" | — |
| 1994 | 80° | 57° | 69° | — | — |
| 1993 | 70° | 56° | 63° | — | — |
| 1992 | 79° | 60° | 69° | — | — |
| 1991 | 67° | 49° | 58° | — | — |
| 1990 | 70° | 56° | 63° | — | — |
| 1989 | 78° | 59° | 69° | — | — |
| 1988 | 71° | 56° | 63° | — | — |
| 1987 | 78° | 54° | 66° | — | — |
| 1986 | 85° | 48° | 66° | — | — |
| 1985 | 68° | 53° | 61° | — | — |
| 1984 | 68° | 54° | 61° | — | — |
| 1983 | 68° | 53° | 61° | 1.73" | — |
| 1982 | 76° | 51° | 63° | — | — |
| 1981 | 65° | 55° | 60° | 0.25" | — |
| 1980 | 78° | 52° | 65° | — | — |
| 1979 | 67° | 48° | 57° | — | — |
| 1978 | 78° | 51° | 65° | — | — |
| 1977 | 71° | 57° | 64° | — | — |
| 1976 | 70° | 45° | 57° | — | — |
| 1975 | 67° | 43° | 55° | — | — |
| 1974 | 69° | 54° | 61° | — | — |
| 1973 | 68° | 51° | 60° | — | — |
| 1972 | 67° | 52° | 59° | — | — |
| 1971coldest | 66° | 44° | 55° | — | — |
55 years of data from SANTA ANA JOHN WAYNE AP