Weather on December 28
San Marcos, CA
55 Years of Data
Avg High
67°F
Avg Low
42°F
Warmest
2017
63°F avg
Coldest
1971
44°F avg
About This Date
December 28th 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 28th was in 2017 (63°F average), while the coldest was 1971 (44°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 31% of December 28th dates historically, with the wettest December 28th recording 1.93" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for December 28th in San Marcos, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 41° | 57° | — | — |
| 2024 | 70° | 45° | 57° | — | — |
| 2023 | 69° | 53° | 61° | — | — |
| 2022 | 64° | 55° | 60° | 1.93" | — |
| 2021 | 56° | 46° | 51° | 1.04" | — |
| 2020 | 60° | 49° | 54° | 1.02" | — |
| 2019 | 62° | 38° | 50° | — | — |
| 2018 | 61° | 40° | 50° | — | — |
| 2017warmest | 83° | 43° | 63° | — | — |
| 2016 | 79° | 43° | 61° | — | — |
| 2015 | 58° | 35° | 46° | 0.08" | — |
| 2014 | 61° | 34° | 47° | — | — |
| 2013 | 76° | 48° | 62° | — | — |
| 2012 | 63° | 36° | 49° | — | — |
| 2011 | 79° | 38° | 58° | — | — |
| 2010 | 68° | 40° | 54° | — | — |
| 2009 | 67° | 49° | 58° | — | — |
| 2008 | 61° | 40° | 50° | — | — |
| 2007 | 78° | 28° | 53° | — | — |
| 2006 | 71° | 37° | 54° | 0.51" | — |
| 2005 | 63° | 50° | 56° | — | — |
| 2004 | 62° | 39° | 51° | 1.7" | — |
| 2003 | 63° | 31° | 47° | — | — |
| 2002 | 69° | 40° | 54° | 0.2" | — |
| 2001 | 68° | 42° | 55° | — | — |
| 2000 | 75° | 37° | 56° | — | — |
| 1999 | 75° | 46° | 61° | — | — |
| 1998 | 77° | 40° | 58° | — | — |
| 1997 | 74° | 40° | 57° | — | — |
| 1996 | 62° | 53° | 58° | — | — |
| 1995 | 66° | 37° | 52° | — | — |
| 1994 | 59° | 49° | 54° | — | — |
| 1993 | 71° | 40° | 55° | — | — |
| 1992 | 60° | 50° | 55° | 1.78" | — |
| 1991 | 61° | 49° | 55° | 0.91" | — |
| 1990 | 65° | 35° | 50° | — | — |
| 1989 | 63° | 52° | 57° | 0.03" | — |
| 1988 | 56° | 37° | 46° | 0.05" | — |
| 1987 | 61° | 31° | 46° | — | — |
| 1986 | 69° | 37° | 53° | — | — |
| 1985 | 72° | 40° | 56° | — | — |
| 1984 | 63° | 44° | 53° | 1.19" | — |
| 1983 | 68° | 53° | 61° | 0.08" | — |
| 1982 | 65° | 43° | 54° | — | — |
| 1981 | 63° | 40° | 51° | — | — |
| 1980 | 75° | 45° | 60° | — | — |
| 1979 | 71° | 34° | 52° | — | — |
| 1978 | 60° | 46° | 53° | — | — |
| 1977 | 66° | 54° | 60° | 0.86" | — |
| 1976 | 76° | 32° | 54° | — | — |
| 1975 | 78° | 40° | 59° | — | — |
| 1974 | 54° | 38° | 46° | 0.81" | — |
| 1973 | 60° | 50° | 55° | 0.1" | — |
| 1972 | 65° | 41° | 53° | — | — |
| 1971coldest | 52° | 37° | 44° | 0.91" | — |
55 years of data from ESCONDIDO #2