Weather on December 16
San Marcos, CA
55 Years of Data
Avg High
69°F
Avg Low
43°F
Warmest
1997
69°F avg
Coldest
1971
47°F avg
About This Date
December 16th 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 16th was in 1997 (69°F average), while the coldest was 1971 (47°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 20% of December 16th dates historically, with the wettest December 16th recording 5.11" of rain. 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 December 16th in San Marcos, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 46° | 63° | — | — |
| 2024 | 72° | 42° | 57° | — | — |
| 2023 | 84° | 46° | 65° | — | — |
| 2022 | 72° | 45° | 58° | — | — |
| 2021 | 60° | 36° | 48° | — | — |
| 2020 | 72° | 41° | 56° | — | — |
| 2019 | 69° | 40° | 54° | — | — |
| 2018 | 74° | 44° | 59° | — | — |
| 2017 | 67° | 46° | 56° | — | — |
| 2016 | 61° | 53° | 57° | 5.11" | — |
| 2015 | 61° | 35° | 48° | — | — |
| 2014 | 61° | 49° | 55° | 0.25" | — |
| 2013 | 86° | 48° | 67° | — | — |
| 2012 | 58° | 47° | 52° | 0.05" | — |
| 2011 | 64° | 40° | 52° | — | — |
| 2010 | 58° | 52° | 55° | 0.3" | — |
| 2009 | 70° | 47° | 58° | — | — |
| 2008 | 59° | 46° | 53° | 0.33" | — |
| 2007 | 64° | 44° | 54° | — | — |
| 2006 | 59° | 48° | 54° | 0.86" | — |
| 2005 | 61° | 41° | 51° | — | — |
| 2004 | 75° | — | — | — | — |
| 2003 | 70° | 40° | 55° | — | — |
| 2002 | 66° | 46° | 56° | — | — |
| 2001 | 64° | 33° | 49° | — | — |
| 2000 | 79° | 41° | 60° | — | — |
| 1999 | 74° | 49° | 61° | — | — |
| 1998 | 83° | 44° | 63° | — | — |
| 1997warmest | 81° | 58° | 69° | — | — |
| 1996 | 76° | 43° | 59° | — | — |
| 1995 | 63° | 47° | 55° | 0.03" | — |
| 1994 | 74° | 36° | 55° | — | — |
| 1993 | 61° | 37° | 49° | — | — |
| 1992 | 64° | 37° | 51° | — | — |
| 1991 | 77° | 44° | 61° | — | — |
| 1990 | 60° | 43° | 51° | 0.15" | — |
| 1989 | 64° | 44° | 54° | — | — |
| 1988 | 58° | 52° | 55° | 0.51" | — |
| 1987 | 57° | 42° | 50° | 1.55" | — |
| 1986 | 68° | 42° | 55° | — | — |
| 1985 | 74° | 44° | 59° | — | — |
| 1984 | 57° | 45° | 51° | 0.97" | — |
| 1983 | 70° | 46° | 58° | — | — |
| 1982 | 72° | 34° | 53° | — | — |
| 1981 | 76° | 42° | 59° | — | — |
| 1980 | 88° | 45° | 66° | — | — |
| 1979 | 78° | 33° | 56° | — | — |
| 1978 | 66° | 38° | 52° | — | — |
| 1977 | 69° | 48° | 59° | — | — |
| 1976 | 77° | 38° | 57° | — | — |
| 1975 | 65° | 29° | 47° | — | — |
| 1974 | 82° | 41° | 62° | — | — |
| 1973 | 80° | 38° | 59° | — | — |
| 1972 | 76° | 35° | 55° | — | — |
| 1971coldest | 64° | 30° | 47° | — | — |
55 years of data from ESCONDIDO #2