Weather on April 21
Oceanside, CA
55 Years of Data
Avg High
68°F
Avg Low
51°F
Warmest
2009
70°F avg
Coldest
2001
50°F avg
About This Date
April 21st in Oceanside, CA typically brings mild spring weather, with average highs around 68°F and lows near 51°F. Over 53 years of records, the warmest April 21st was in 2009 (70°F average), while the coldest was 2001 (50°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 21st dates historically, with the wettest April 21st recording 1.14" of rain. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Oceanside, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 46° | 56° | — | — |
| 2024 | 67° | 56° | 61° | — | — |
| 2023 | 83° | 47° | 65° | — | — |
| 2022 | 69° | 44° | 57° | — | — |
| 2021 | 67° | 57° | 62° | — | — |
| 2020 | 69° | 55° | 62° | — | — |
| 2019 | 66° | 46° | 56° | — | — |
| 2018 | 73° | 44° | 59° | — | — |
| 2017 | 81° | 48° | 64° | — | — |
| 2016 | 74° | 43° | 58° | — | — |
| 2015 | 70° | 52° | 61° | — | — |
| 2014 | 70° | 58° | 64° | — | — |
| 2013 | 70° | 43° | 56° | — | — |
| 2012 | 65° | 56° | 60° | — | — |
| 2011 | 70° | 57° | 63° | — | — |
| 2010 | 63° | 49° | 56° | 1.14" | — |
| 2009warmest | 86° | 54° | 70° | — | — |
| 2008 | 64° | 42° | 53° | — | — |
| 2007 | 65° | 46° | 55° | — | — |
| 2006 | 69° | 50° | 60° | — | — |
| 2005 | 70° | 45° | 57° | — | — |
| 2004 | 70° | 52° | 61° | — | — |
| 2003 | 63° | 55° | 59° | — | — |
| 2002 | 68° | 42° | 55° | — | — |
| 2001coldest | 58° | 43° | 50° | 0.41" | — |
| 2000 | 65° | 51° | 58° | 0.1" | — |
| 1999 | 63° | 57° | 60° | — | — |
| 1998 | 64° | 53° | 59° | — | — |
| 1997 | 64° | 59° | 62° | — | — |
| 1996 | 63° | 47° | 55° | — | — |
| 1995 | 59° | 47° | 53° | — | — |
| 1994 | 60° | 56° | 58° | — | — |
| 1993 | 70° | 53° | 61° | — | — |
| 1992 | 72° | 53° | 62° | — | — |
| 1991 | 61° | 53° | 57° | — | — |
| 1990 | 63° | 61° | 62° | — | — |
| 1989 | 64° | 57° | 61° | — | — |
| 1988 | 63° | 51° | 57° | 0.91" | — |
| 1987 | 72° | 58° | 65° | — | — |
| 1986 | 71° | 52° | 61° | — | — |
| 1985 | 60° | 54° | 57° | 0.18" | — |
| 1984 | 70° | 46° | 58° | — | — |
| 1983 | 64° | 57° | 61° | — | — |
| 1982 | 83° | 56° | 69° | — | — |
| 1981 | 72° | 54° | 63° | — | — |
| 1980 | 64° | 57° | 61° | — | — |
| 1978 | 64° | 45° | 54° | — | — |
| 1977 | 66° | 43° | 54° | — | — |
| 1976 | 71° | 48° | 60° | — | — |
| 1975 | 66° | 42° | 54° | — | — |
| 1974 | 69° | 56° | 62° | — | — |
| 1972 | 68° | 44° | 56° | — | — |
| 1971 | 62° | 50° | 56° | — | — |
53 years of data from OCEANSIDE MUNI AP