Weather on September 12
El Cajon, CA
55 Years of Data
Avg High
86°F
Avg Low
63°F
Warmest
1971
87°F avg
Coldest
1978
64°F avg
About This Date
September 12th in El Cajon, CA typically brings warm fall weather, with average highs around 86°F and lows near 63°F. Over 54 years of records, the warmest September 12th was in 1971 (87°F average), while the coldest was 1978 (64°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for September 12th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 66° | 72° | — | — |
| 2024 | 79° | 61° | 70° | — | — |
| 2023 | 84° | 68° | 76° | — | — |
| 2022 | 86° | 71° | 79° | — | — |
| 2021 | 98° | 69° | 84° | — | — |
| 2020 | 89° | 56° | 72° | — | — |
| 2019 | 90° | 60° | 75° | — | — |
| 2018 | 86° | 63° | 74° | — | — |
| 2017 | 88° | 70° | 79° | — | — |
| 2016 | 80° | 64° | 72° | — | — |
| 2015 | 94° | 74° | 84° | — | — |
| 2014 | 95° | 67° | 81° | — | — |
| 2013 | 87° | 59° | 73° | — | — |
| 2012 | 89° | 69° | 79° | — | — |
| 2011 | 88° | 57° | 72° | — | — |
| 2010 | 87° | 58° | 72° | — | — |
| 2009 | 90° | 65° | 77° | — | — |
| 2008 | 83° | 63° | 73° | — | — |
| 2007 | 90° | 61° | 75° | — | — |
| 2006 | 93° | 63° | 78° | — | — |
| 2005 | 72° | 57° | 64° | — | — |
| 2004 | 90° | 68° | 79° | — | — |
| 2003 | 91° | 63° | 77° | — | — |
| 2002 | 91° | 60° | 76° | — | — |
| 2001 | 83° | 60° | 71° | — | — |
| 2000 | 102° | 56° | 79° | — | — |
| 1999 | 89° | 59° | 74° | — | — |
| 1998 | 78° | 60° | 69° | — | — |
| 1996 | 96° | 59° | 78° | — | — |
| 1995 | 95° | 61° | 78° | — | — |
| 1994 | 75° | 64° | 70° | — | — |
| 1993 | 73° | 64° | 69° | — | — |
| 1992 | 84° | 58° | 71° | — | — |
| 1991 | 76° | 56° | 66° | — | — |
| 1990 | 96° | 65° | 80° | — | — |
| 1989 | 82° | 62° | 72° | — | — |
| 1988 | 76° | 63° | 69° | — | — |
| 1987 | 72° | 63° | 67° | — | — |
| 1986 | 78° | 59° | 69° | — | — |
| 1985 | 85° | 49° | 67° | — | — |
| 1984 | 83° | 69° | 76° | — | — |
| 1983 | 100° | 67° | 83° | — | — |
| 1982 | 83° | 60° | 71° | — | — |
| 1981 | 93° | 57° | 75° | — | — |
| 1980 | 82° | 63° | 72° | — | — |
| 1979 | 95° | 65° | 80° | — | — |
| 1978coldest | 68° | 61° | 64° | — | — |
| 1977 | 81° | 65° | 73° | — | — |
| 1976 | 79° | 65° | 72° | — | — |
| 1975 | 76° | 64° | 70° | — | — |
| 1974 | 78° | 65° | 71° | — | — |
| 1973 | 79° | 59° | 69° | — | — |
| 1972 | 81° | 59° | 70° | — | — |
| 1971warmest | 108° | 67° | 87° | — | — |
54 years of data from GILLESPIE FLD