Weather on December 22
San Marcos, CA
55 Years of Data
Avg High
67°F
Avg Low
42°F
Warmest
2014
62°F avg
Coldest
1990
42°F avg
About This Date
December 22nd in San Marcos, CA typically brings mild winter weather, with average highs around 67°F and lows near 42°F — a 25°F daily swing. Over 55 years of records, the warmest December 22nd was in 2014 (62°F average), while the coldest was 1990 (42°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 22nd dates historically, with the wettest December 22nd recording 7.67" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for December 22nd in San Marcos, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 49° | 62° | — | — |
| 2024 | 71° | 43° | 57° | — | — |
| 2023 | 65° | 54° | 59° | 1.04" | — |
| 2022 | 75° | 42° | 59° | — | — |
| 2021 | 70° | 46° | 58° | — | — |
| 2020 | 76° | 45° | 60° | — | — |
| 2019 | 65° | 47° | 56° | — | — |
| 2018 | 73° | 43° | 58° | — | — |
| 2017 | 68° | 35° | 52° | — | — |
| 2016 | 61° | 56° | 58° | 2.72" | — |
| 2015 | 60° | 52° | 56° | 1.24" | — |
| 2014warmest | 78° | 47° | 62° | — | — |
| 2013 | 70° | 40° | 55° | — | — |
| 2012 | 60° | 35° | 48° | — | — |
| 2011 | 66° | 46° | 56° | — | — |
| 2010 | 58° | 56° | 57° | 7.67" | — |
| 2009 | 58° | 47° | 52° | 0.08" | — |
| 2008 | 57° | 46° | 52° | 0.69" | — |
| 2007 | 64° | 39° | 52° | — | — |
| 2006 | 64° | 35° | 50° | — | — |
| 2005 | 65° | 51° | 58° | 0.03" | — |
| 2004 | 68° | 42° | 55° | — | — |
| 2003 | 76° | 40° | 58° | — | — |
| 2002 | 59° | 47° | 53° | 0.13" | — |
| 2001 | 60° | 38° | 49° | — | — |
| 2000 | 74° | 38° | 56° | — | — |
| 1999 | 73° | 49° | 61° | — | — |
| 1998 | 58° | 32° | 45° | — | — |
| 1997 | 68° | 43° | 55° | — | — |
| 1996 | 59° | 52° | 55° | 0.41" | — |
| 1995 | 64° | 40° | 52° | — | — |
| 1994 | 67° | 39° | 53° | 0.03" | — |
| 1993 | 70° | 34° | 52° | — | — |
| 1992 | 68° | 33° | 51° | — | — |
| 1991 | 70° | 44° | 57° | — | — |
| 1990coldest | 53° | 31° | 42° | 0.05" | — |
| 1989 | 81° | 38° | 59° | — | — |
| 1988 | 62° | 36° | 49° | — | — |
| 1987 | 67° | 34° | 50° | — | — |
| 1986 | 71° | 38° | 54° | — | — |
| 1985 | 74° | 40° | 57° | — | — |
| 1984 | 69° | 38° | 53° | — | — |
| 1983 | 62° | 44° | 53° | — | — |
| 1982 | 62° | 46° | 54° | 0.08" | — |
| 1981 | 65° | 38° | 51° | — | — |
| 1980 | 76° | 42° | 59° | — | — |
| 1979 | 60° | 45° | 52° | — | — |
| 1978 | 68° | 34° | 51° | — | — |
| 1977 | 66° | 55° | 61° | — | — |
| 1976 | 72° | 34° | 53° | — | — |
| 1975 | 67° | 39° | 53° | — | — |
| 1974 | 65° | 38° | 51° | — | — |
| 1973 | 59° | 44° | 52° | 0.1" | — |
| 1972 | 75° | 41° | 58° | — | — |
| 1971 | 59° | 51° | 55° | 2.69" | — |
55 years of data from ESCONDIDO #2