Weather on May 21
Oceanside, CA
55 Years of Data
Avg High
68°F
Avg Low
55°F
Warmest
2013
68°F avg
Coldest
2002
55°F avg
About This Date
May 21st in Oceanside, CA typically brings mild spring weather, with average highs around 68°F and lows near 55°F. Over 54 years of records, the warmest May 21st was in 2013 (68°F average), while the coldest was 2002 (55°F) — a 13°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 21st dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 21st in Oceanside, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 48° | 61° | — | — |
| 2024 | 71° | 55° | 63° | — | — |
| 2023 | 71° | 60° | 66° | — | — |
| 2022 | 67° | 60° | 63° | — | — |
| 2021 | 69° | 54° | 61° | — | — |
| 2020 | 75° | 48° | 62° | — | — |
| 2019 | 68° | 50° | 59° | — | — |
| 2018 | 68° | 59° | 64° | 0.05" | — |
| 2017 | 78° | 51° | 65° | — | — |
| 2016 | 67° | 56° | 61° | — | — |
| 2015 | 69° | 61° | 65° | — | — |
| 2014 | 71° | 49° | 60° | — | — |
| 2013warmest | 74° | 63° | 68° | — | — |
| 2012 | 72° | 56° | 64° | — | — |
| 2011 | 68° | 53° | 61° | — | — |
| 2010 | 70° | 58° | 64° | — | — |
| 2009 | 70° | 58° | 64° | — | — |
| 2008 | 71° | 58° | 64° | — | — |
| 2007 | 66° | 62° | 64° | — | — |
| 2006 | 68° | 52° | 60° | — | — |
| 2005 | 79° | 53° | 66° | 0.03" | — |
| 2004 | 70° | 56° | 63° | — | — |
| 2003 | 72° | 51° | 61° | — | — |
| 2002coldest | 66° | 45° | 55° | — | — |
| 2001 | 69° | 60° | 65° | 0.03" | — |
| 2000 | 71° | 52° | 61° | — | — |
| 1999 | 64° | 57° | 61° | — | — |
| 1998 | 64° | 56° | 60° | — | — |
| 1997 | 68° | 63° | 65° | — | — |
| 1996 | 67° | 57° | 62° | — | — |
| 1995 | 61° | 57° | 59° | — | — |
| 1994 | 64° | 49° | 56° | — | — |
| 1993 | 66° | 60° | 63° | — | — |
| 1992 | 67° | 61° | 64° | — | — |
| 1991 | 60° | 54° | 57° | — | — |
| 1990 | 65° | 54° | 59° | — | — |
| 1989 | 66° | 52° | 59° | — | — |
| 1987 | 65° | 55° | 60° | — | — |
| 1986 | 66° | 59° | 63° | — | — |
| 1985 | 63° | 62° | 62° | — | — |
| 1984 | 70° | 61° | 65° | — | — |
| 1983 | 67° | 53° | 60° | — | — |
| 1982 | 65° | 61° | 63° | — | — |
| 1981 | 66° | 59° | 63° | — | — |
| 1980 | 66° | 58° | 62° | 0.13" | — |
| 1979 | 67° | 59° | 63° | — | — |
| 1978 | 75° | 53° | 64° | — | — |
| 1977 | 67° | 50° | 58° | — | — |
| 1976 | 71° | 52° | 61° | — | — |
| 1975 | 68° | 46° | 57° | — | — |
| 1974 | 71° | 49° | 60° | — | — |
| 1973 | 70° | 54° | 62° | — | — |
| 1972 | 69° | 46° | 58° | — | — |
| 1971 | 66° | 53° | 60° | — | — |
54 years of data from OCEANSIDE MUNI AP