Weather on December 19
San Marcos, CA
55 Years of Data
Avg High
69°F
Avg Low
43°F
Warmest
1997
71°F avg
Coldest
1992
46°F avg
About This Date
December 19th in San Marcos, CA typically brings mild winter weather, with average highs around 69°F and lows near 43°F — a 26°F daily swing. Over 55 years of records, the warmest December 19th was in 1997 (71°F average), while the coldest was 1992 (46°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 19th dates historically, with the wettest December 19th recording 2.46" of rain. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for December 19th 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 | 81° | 50° | 65° | — | — |
| 2024 | 83° | 46° | 64° | — | — |
| 2023 | 73° | 56° | 64° | 0.08" | — |
| 2022 | 68° | 37° | 53° | — | — |
| 2021 | 71° | 37° | 54° | — | — |
| 2020 | 74° | 41° | 57° | — | — |
| 2019 | 65° | 37° | 51° | — | — |
| 2018 | 75° | 46° | 61° | — | — |
| 2017 | 70° | 41° | 55° | — | — |
| 2016 | 72° | 38° | 55° | — | — |
| 2015 | 66° | 40° | 53° | — | — |
| 2014 | 67° | 45° | 56° | — | — |
| 2013 | 55° | 51° | 53° | 0.38" | — |
| 2012 | 60° | 35° | 48° | — | — |
| 2011 | 58° | 47° | 52° | — | — |
| 2010 | 58° | 54° | 56° | 0.84" | — |
| 2009 | 82° | 53° | 68° | — | — |
| 2008 | 57° | 42° | 50° | — | — |
| 2007 | 60° | 54° | 57° | 0.71" | — |
| 2006 | 59° | 32° | 46° | — | — |
| 2005 | 79° | 41° | 60° | — | — |
| 2004 | 82° | 45° | 63° | — | — |
| 2003 | 73° | 42° | 58° | — | — |
| 2002 | 64° | 34° | 49° | — | — |
| 2001 | 76° | 36° | 56° | — | — |
| 2000 | 80° | 42° | 61° | — | — |
| 1999 | 70° | 48° | 59° | — | — |
| 1998 | 81° | 44° | 62° | — | — |
| 1997warmest | 79° | 63° | 71° | 0.1" | — |
| 1996 | 73° | 37° | 55° | — | — |
| 1995 | 63° | 42° | 52° | — | — |
| 1994 | 73° | 38° | 55° | — | — |
| 1993 | 65° | 61° | 63° | 0.2" | — |
| 1992coldest | 58° | 34° | 46° | — | — |
| 1991 | 60° | 50° | 55° | 0.28" | — |
| 1990 | 58° | 46° | 52° | 0.28" | — |
| 1989 | 69° | 45° | 57° | — | — |
| 1988 | 61° | 42° | 51° | 0.46" | — |
| 1987 | 61° | 41° | 51° | 0.53" | — |
| 1986 | 66° | 43° | 54° | — | — |
| 1985 | 78° | 43° | 60° | — | — |
| 1984 | 62° | 48° | 55° | 2.46" | — |
| 1983 | 60° | 43° | 51° | — | — |
| 1982 | 78° | 43° | 60° | — | — |
| 1981 | 73° | 44° | 59° | — | — |
| 1980 | 66° | 45° | 55° | — | — |
| 1979 | 73° | 37° | 55° | — | — |
| 1978 | 51° | 42° | 47° | 0.97" | — |
| 1977 | 64° | 38° | 51° | — | — |
| 1976 | 70° | 42° | 56° | — | — |
| 1975 | 65° | 32° | 48° | — | — |
| 1974 | 71° | 37° | 54° | — | — |
| 1973 | 77° | 37° | 57° | — | — |
| 1972 | 70° | 41° | 55° | — | — |
| 1971 | 66° | 37° | 52° | — | — |
55 years of data from ESCONDIDO #2