Weather on December 23
San Marcos, CA
55 Years of Data
Avg High
67°F
Avg Low
43°F
Warmest
2014
65°F avg
Coldest
1990
41°F avg
About This Date
December 23rd in San Marcos, CA typically brings mild winter weather, with average highs around 67°F and lows near 43°F. Over 55 years of records, the warmest December 23rd was in 2014 (65°F average), while the coldest was 1990 (41°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 31% of December 23rd dates historically, with the wettest December 23rd recording 2.95" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for December 23rd in San Marcos, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 54° | 58° | 0.15" | — |
| 2024 | 73° | 45° | 59° | — | — |
| 2023 | 68° | 51° | 60° | — | — |
| 2022 | 72° | 43° | 57° | — | — |
| 2021 | 65° | 51° | 58° | 0.08" | — |
| 2020 | 74° | 42° | 58° | — | — |
| 2019 | 57° | 50° | 54° | 0.66" | — |
| 2018 | 68° | 45° | 56° | — | — |
| 2017 | 68° | 38° | 53° | — | — |
| 2016 | 60° | 56° | 58° | 0.3" | — |
| 2015 | 64° | 55° | 60° | 0.48" | — |
| 2014warmest | 82° | 48° | 65° | — | — |
| 2013 | 78° | 43° | 60° | — | — |
| 2012 | 62° | 44° | 53° | — | — |
| 2011 | 68° | 34° | 51° | — | — |
| 2010 | 60° | 46° | 53° | 0.05" | — |
| 2009 | 59° | 41° | 50° | — | — |
| 2008 | 56° | 48° | 52° | 0.05" | — |
| 2007 | 74° | 43° | 58° | — | — |
| 2006 | 61° | 42° | 51° | 1.02" | — |
| 2005 | 76° | 49° | 62° | — | — |
| 2004 | 67° | 44° | 55° | — | — |
| 2003 | 67° | 44° | 55° | 0.08" | — |
| 2002 | 60° | 35° | 48° | — | — |
| 2001 | 60° | 40° | 50° | 0.13" | — |
| 2000 | 68° | 36° | 52° | — | — |
| 1999 | 74° | 45° | 59° | — | — |
| 1998 | 68° | 32° | 50° | — | — |
| 1997 | 73° | 56° | 64° | — | — |
| 1996 | 63° | 44° | 53° | 0.15" | — |
| 1995 | 58° | 40° | 49° | 0.79" | — |
| 1994 | 72° | 52° | 62° | 0.36" | — |
| 1993 | 71° | 34° | 52° | — | — |
| 1992 | 75° | 34° | 54° | — | — |
| 1991 | 69° | 45° | 57° | — | — |
| 1990coldest | 55° | 26° | 41° | — | — |
| 1989 | 89° | 40° | 64° | — | — |
| 1988 | 62° | 45° | 53° | 0.3" | — |
| 1987 | 61° | 42° | 51° | — | — |
| 1986 | 71° | 38° | 54° | — | — |
| 1985 | 72° | 43° | 57° | — | — |
| 1984 | 67° | 36° | 51° | — | — |
| 1983 | 63° | 44° | 53° | — | — |
| 1982 | 60° | 46° | 53° | 2.95" | — |
| 1981 | 65° | 33° | 49° | — | — |
| 1980 | 78° | 44° | 61° | — | — |
| 1979 | 66° | 36° | 51° | — | — |
| 1978 | 67° | 33° | 50° | — | — |
| 1977 | 62° | 55° | 59° | 0.41" | — |
| 1976 | 68° | 35° | 52° | — | — |
| 1975 | 65° | 43° | 54° | — | — |
| 1974 | 58° | 32° | 45° | — | — |
| 1973 | 62° | 37° | 50° | — | — |
| 1972 | 70° | 45° | 57° | — | — |
| 1971 | 65° | 50° | 57° | 0.76" | — |
55 years of data from ESCONDIDO #2