Weather on September 17
El Cajon, CA
55 Years of Data
Avg High
84°F
Avg Low
62°F
Warmest
2014
88°F avg
Coldest
1988
65°F avg
About This Date
September 17th in El Cajon, CA typically brings warm fall weather, with average highs around 84°F and lows near 62°F. Over 53 years of records, the warmest September 17th was in 2014 (88°F average), while the coldest was 1988 (65°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 8% of September 17th dates historically. 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 September 17th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 71° | 79° | 0.08" | — |
| 2024 | 74° | 56° | 65° | — | — |
| 2023 | 71° | 65° | 68° | 0.13" | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 81° | 62° | 71° | — | — |
| 2020 | 102° | 61° | 81° | — | — |
| 2019 | 86° | 62° | 74° | — | — |
| 2018 | 91° | 61° | 76° | — | — |
| 2017 | 80° | 66° | 73° | — | — |
| 2016 | 85° | 57° | 71° | — | — |
| 2015 | 84° | 63° | 73° | — | — |
| 2014warmest | 99° | 77° | 88° | — | — |
| 2013 | 81° | 65° | 73° | — | — |
| 2012 | 86° | 65° | 75° | — | — |
| 2011 | 75° | 61° | 68° | — | — |
| 2010 | 83° | 57° | 70° | — | — |
| 2009 | 88° | 61° | 74° | — | — |
| 2008 | 88° | 63° | 75° | — | — |
| 2007 | 74° | 60° | 67° | — | — |
| 2006 | 91° | 54° | 72° | — | — |
| 2005 | 75° | 59° | 67° | — | — |
| 2004 | 87° | 65° | 76° | — | — |
| 2003 | 83° | 66° | 74° | — | — |
| 2002 | 79° | 56° | 67° | — | — |
| 2001 | 83° | 61° | 72° | — | — |
| 2000 | 100° | 66° | 83° | — | — |
| 1999 | 79° | 60° | 69° | — | — |
| 1998 | 76° | 63° | 69° | — | — |
| 1995 | 89° | 64° | 77° | — | — |
| 1994 | 83° | 63° | 73° | — | — |
| 1993 | 73° | 58° | 65° | — | — |
| 1992 | 94° | 65° | 79° | — | — |
| 1991 | — | 58° | — | — | — |
| 1990 | 80° | 62° | 71° | — | — |
| 1989 | 65° | 78° | 71° | 0.23" | — |
| 1988coldest | 74° | 57° | 65° | — | — |
| 1987 | 82° | 60° | 71° | — | — |
| 1986 | 84° | 54° | 69° | — | — |
| 1985 | 78° | 59° | 69° | — | — |
| 1984 | 97° | 71° | 84° | — | — |
| 1983 | 94° | 63° | 78° | — | — |
| 1982 | 78° | 56° | 67° | 0.1" | — |
| 1981 | 95° | 62° | 79° | — | — |
| 1980 | 97° | 62° | 79° | — | — |
| 1979 | 99° | 71° | 85° | — | — |
| 1978 | 75° | 62° | 69° | — | — |
| 1977 | 79° | 53° | 66° | — | — |
| 1976 | 77° | 60° | 69° | — | — |
| 1975 | 95° | 67° | 81° | — | — |
| 1974 | 82° | 60° | 71° | — | — |
| 1973 | 79° | 58° | 68° | — | — |
| 1972 | 82° | 60° | 71° | — | — |
| 1971 | 78° | 69° | 74° | — | — |
53 years of data from GILLESPIE FLD