Weather on December 21
Oceanside, CA
55 Years of Data
Avg High
65°F
Avg Low
42°F
Warmest
1972
63°F avg
Coldest
2012
45°F avg
About This Date
December 21st in Oceanside, CA typically brings mild winter weather, with average highs around 65°F and lows near 42°F. Over 53 years of records, the warmest December 21st was in 1972 (63°F average), while the coldest was 2012 (45°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 21% of December 21st dates historically, with the wettest December 21st recording 7.54" 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 December 21st in Oceanside, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 51° | 59° | — | — |
| 2024 | 65° | 36° | 50° | — | — |
| 2023 | 71° | 53° | 62° | 0.51" | — |
| 2022 | 69° | 33° | 51° | — | — |
| 2021 | 66° | 44° | 55° | — | — |
| 2020 | 78° | 41° | 60° | — | — |
| 2019 | 73° | 40° | 56° | — | — |
| 2018 | 66° | 43° | 54° | — | — |
| 2017 | 60° | 32° | 46° | — | — |
| 2016 | 68° | 55° | 62° | 1.83" | — |
| 2015 | 63° | 36° | 49° | 0.18" | — |
| 2014 | 67° | 46° | 56° | — | — |
| 2013 | 62° | 38° | 50° | — | — |
| 2012coldest | 61° | 29° | 45° | — | — |
| 2011 | 62° | 35° | 49° | — | — |
| 2010 | 61° | 54° | 57° | 7.54" | — |
| 2009 | 66° | 43° | 54° | — | — |
| 2008 | 61° | 38° | 49° | 0.03" | — |
| 2007 | 64° | 38° | 51° | 0.05" | — |
| 2006 | 62° | 36° | 49° | — | — |
| 2005 | 80° | 44° | 62° | — | — |
| 2004 | 65° | 42° | 53° | — | — |
| 2003 | 66° | 43° | 54° | — | — |
| 2002 | 57° | 44° | 51° | 0.56" | — |
| 2001 | 59° | 42° | 51° | 0.41" | — |
| 2000 | 62° | 31° | 46° | — | — |
| 1999 | 74° | 31° | 52° | — | — |
| 1998 | 60° | 38° | 49° | — | — |
| 1997 | 73° | 44° | 59° | 0.43" | — |
| 1996 | 59° | 47° | 53° | — | — |
| 1995 | 62° | 42° | 52° | — | — |
| 1994 | 62° | 40° | 51° | — | — |
| 1993 | 64° | 46° | 55° | — | — |
| 1992 | 61° | 37° | 49° | — | — |
| 1991 | 71° | 46° | 59° | — | — |
| 1990 | 53° | 40° | 46° | — | — |
| 1989 | 61° | 42° | 51° | — | — |
| 1988 | 59° | 53° | 56° | — | — |
| 1987 | 61° | 40° | 50° | — | — |
| 1985 | 70° | 46° | 58° | — | — |
| 1984 | 60° | 41° | 51° | — | — |
| 1983 | 61° | 46° | 53° | — | — |
| 1982 | 65° | 50° | 57° | — | — |
| 1981 | 63° | 43° | 53° | — | — |
| 1980 | 62° | 43° | 52° | — | — |
| 1979 | 62° | 52° | 57° | 0.41" | — |
| 1977 | 68° | 40° | 54° | — | — |
| 1976 | 74° | 40° | 57° | — | — |
| 1975 | 62° | 44° | 53° | 0.18" | — |
| 1974 | 61° | 42° | 51° | — | — |
| 1973 | 66° | 44° | 55° | — | — |
| 1972warmest | 76° | 50° | 63° | — | — |
| 1971 | 59° | 40° | 49° | — | — |
53 years of data from OCEANSIDE MUNI AP