Weather on December 17
El Cajon, CA
55 Years of Data
Avg High
69°F
Avg Low
41°F
Warmest
1998
66°F avg
Coldest
1971
45°F avg
About This Date
December 17th in El Cajon, CA typically brings mild winter weather, with average highs around 69°F and lows near 41°F — a 28°F daily swing. Over 55 years of records, the warmest December 17th was in 1998 (66°F average), while the coldest was 1971 (45°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 17th dates historically, with the wettest December 17th recording 5.59" of rain. The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in El Cajon, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 44° | 59° | — | — |
| 2024 | 78° | 40° | 59° | — | — |
| 2023 | 76° | 39° | 57° | — | — |
| 2022 | 67° | 32° | 49° | — | — |
| 2021 | 69° | 46° | 58° | — | — |
| 2020 | 65° | 39° | 52° | — | — |
| 2019 | 70° | 34° | 52° | — | — |
| 2018 | 68° | 50° | 59° | — | — |
| 2017 | 74° | 42° | 58° | — | — |
| 2016 | 61° | 41° | 51° | — | — |
| 2015 | 69° | 34° | 51° | — | — |
| 2014 | 64° | 53° | 59° | 1.3" | — |
| 2013 | 81° | 48° | 64° | — | — |
| 2012 | 63° | 53° | 58° | 0.13" | — |
| 2011 | 67° | 39° | 53° | — | — |
| 2010 | 64° | 44° | 54° | 0.03" | — |
| 2009 | 78° | 39° | 59° | — | — |
| 2008 | 57° | 48° | 53° | 5.59" | — |
| 2007 | 65° | 38° | 51° | — | — |
| 2006 | 57° | 44° | 51° | — | — |
| 2005 | 61° | 47° | 54° | — | — |
| 2004 | 80° | 38° | 59° | — | — |
| 2003 | 76° | 34° | 55° | — | — |
| 2002 | 60° | 51° | 56° | 2.29" | — |
| 2001 | 69° | 33° | 51° | — | — |
| 2000 | 82° | 39° | 61° | — | — |
| 1999 | 84° | 40° | 62° | — | — |
| 1998warmest | 84° | 48° | 66° | — | — |
| 1997 | 72° | 45° | 58° | — | — |
| 1996 | 76° | 40° | 58° | — | — |
| 1995 | 69° | 41° | 55° | — | — |
| 1994 | 72° | 33° | 52° | — | — |
| 1993 | 65° | 35° | 50° | — | — |
| 1992 | 60° | 38° | 49° | — | — |
| 1991 | 60° | 43° | 51° | 0.13" | — |
| 1990 | 62° | 37° | 50° | — | — |
| 1989 | 68° | 36° | 52° | — | — |
| 1988 | 61° | 47° | 54° | — | — |
| 1987 | 60° | 45° | 52° | 3.05" | — |
| 1986 | 70° | 44° | 57° | — | — |
| 1985 | 77° | 38° | 57° | — | — |
| 1984 | 59° | 32° | 46° | — | — |
| 1983 | 61° | 52° | 56° | — | — |
| 1982 | 69° | 41° | 55° | — | — |
| 1981 | 77° | 38° | 57° | — | — |
| 1980 | 80° | 46° | 63° | — | — |
| 1979 | 81° | 33° | 57° | — | — |
| 1978 | 57° | 50° | 54° | 2.92" | — |
| 1977 | 70° | 40° | 55° | — | — |
| 1976 | 73° | 35° | 54° | — | — |
| 1975 | 69° | 31° | 50° | — | — |
| 1974 | 74° | 39° | 56° | — | — |
| 1973 | 73° | 39° | 56° | — | — |
| 1972 | 68° | 39° | 54° | — | — |
| 1971coldest | 62° | 29° | 45° | — | — |
55 years of data from GILLESPIE FLD