Weather on September 12
El Cajon, CA
55 Years of Data
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.
| 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° | — | — |
El Cajon, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
El Cajon, CA Monthly Precipitation
Average rainfall per month, in inches.
El Cajon, 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 El Cajon, CA
El Cajon, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.