Weather on December 18
San Diego, CA
55 Years of Data
Avg High
66°F
Avg Low
49°F
Warmest
2018
64°F avg
Coldest
2006
50°F avg
About This Date
December 18th in San Diego, CA typically brings mild winter weather, with average highs around 66°F and lows near 49°F. Over 55 years of records, the warmest December 18th was in 2018 (64°F average), while the coldest was 2006 (50°F) — a 14°F range across recorded history. Rain or other precipitation has occurred on about 18% of December 18th dates historically, with the wettest December 18th recording 1.09" 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 18th in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 50° | 62° | — | — |
| 2024 | 70° | 47° | 58° | — | — |
| 2023 | 73° | 52° | 62° | — | — |
| 2022 | 63° | 46° | 54° | — | — |
| 2021 | 65° | 39° | 52° | — | — |
| 2020 | 67° | 50° | 58° | — | — |
| 2019 | 65° | 41° | 53° | — | — |
| 2018warmest | 71° | 58° | 64° | — | — |
| 2017 | 70° | 49° | 59° | — | — |
| 2016 | 62° | 42° | 52° | — | — |
| 2015 | 69° | 47° | 58° | — | — |
| 2014 | 65° | 53° | 59° | — | — |
| 2013 | 68° | 58° | 63° | — | — |
| 2012 | 61° | 54° | 57° | 0.13" | — |
| 2011 | 60° | 52° | 56° | — | — |
| 2010 | 63° | 59° | 61° | 0.03" | — |
| 2009 | 74° | 50° | 62° | — | — |
| 2008 | 58° | 49° | 53° | — | — |
| 2007 | 61° | 47° | 54° | — | — |
| 2006coldest | 58° | 43° | 50° | — | — |
| 2005 | 61° | 52° | 56° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 71° | 47° | 59° | — | — |
| 2002 | 60° | 49° | 54° | 0.13" | — |
| 2001 | 61° | 44° | 52° | — | — |
| 2000 | 77° | 49° | 63° | — | — |
| 1999 | 67° | 49° | 58° | — | — |
| 1998 | 60° | 57° | 59° | — | — |
| 1997 | 64° | 54° | 59° | 0.08" | — |
| 1996 | 69° | 46° | 58° | — | — |
| 1995 | 65° | 45° | 55° | — | — |
| 1994 | 65° | 43° | 54° | — | — |
| 1993 | 62° | 45° | 53° | — | — |
| 1992 | 58° | 48° | 53° | 0.3" | — |
| 1991 | 64° | 54° | 59° | 0.05" | — |
| 1990 | 62° | 44° | 53° | — | — |
| 1989 | 61° | 47° | 54° | — | — |
| 1988 | 59° | 49° | 54° | 0.2" | — |
| 1987 | 63° | 45° | 54° | — | — |
| 1986 | 67° | 49° | 58° | — | — |
| 1985 | 78° | 45° | 61° | — | — |
| 1984 | 60° | 50° | 55° | 1.09" | — |
| 1983 | 70° | 52° | 61° | — | — |
| 1982 | 69° | 50° | 60° | — | — |
| 1981 | 72° | 50° | 61° | — | — |
| 1980 | 63° | 54° | 58° | — | — |
| 1979 | 75° | 50° | 63° | — | — |
| 1978 | 61° | 55° | 58° | 0.97" | — |
| 1977 | 66° | 58° | 62° | 0.79" | — |
| 1976 | 70° | 52° | 61° | — | — |
| 1975 | 70° | 44° | 57° | — | — |
| 1974 | 72° | 49° | 60° | — | — |
| 1973 | 65° | 53° | 59° | — | — |
| 1972 | 73° | 52° | 62° | — | — |
| 1971 | 61° | 48° | 54° | — | — |
55 years of data from SAN DIEGO INTL AP