Weather on December 22
San Marcos, CA
55 Years of Data
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.
| 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" | — |
San Marcos, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Marcos, CA Monthly Precipitation
Average rainfall per month, in inches.
San Marcos, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Marcos, CA
Most pleasant months in San Marcos, CA: June.