Weather on September 4
El Cajon, CA
55 Years of Data
Avg High
90°F
Avg Low
65°F
Warmest
1988
91°F avg
Coldest
1999
68°F avg
About This Date
September 4th in El Cajon, CA typically brings hot fall weather, with average highs around 90°F and lows near 65°F — a 25°F daily swing. Over 53 years of records, the warmest September 4th was in 1988 (91°F average), while the coldest was 1999 (68°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 6% of September 4th dates historically. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for September 4th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 67° | 79° | — | — |
| 2024 | 97° | 65° | 81° | — | — |
| 2023 | 80° | 65° | 72° | — | — |
| 2022 | 93° | 81° | 87° | 0.03" | — |
| 2021 | 100° | 62° | 81° | — | — |
| 2020 | 96° | 64° | 80° | — | — |
| 2019 | 96° | 72° | 84° | — | — |
| 2018 | 74° | 65° | 69° | — | — |
| 2017 | 80° | 70° | 75° | 0.03" | — |
| 2016 | 77° | 63° | 70° | — | — |
| 2015 | 80° | 66° | 73° | — | — |
| 2014 | 86° | 68° | 77° | — | — |
| 2013 | 100° | 73° | 87° | — | — |
| 2012 | 99° | 66° | 82° | — | — |
| 2011 | 88° | 62° | 75° | — | — |
| 2010 | 101° | 64° | 82° | — | — |
| 2009 | 97° | 69° | 83° | — | — |
| 2008 | 98° | 66° | 82° | — | — |
| 2007 | 86° | 66° | 76° | — | — |
| 2006 | 100° | 60° | 80° | — | — |
| 2005 | 82° | 60° | 71° | — | — |
| 2004 | 95° | 56° | 75° | — | — |
| 2003 | 98° | 66° | 82° | — | — |
| 2002 | 87° | 64° | 76° | — | — |
| 2001 | 92° | 66° | 79° | — | — |
| 2000 | 85° | 55° | 70° | — | — |
| 1999coldest | 81° | 56° | 68° | — | — |
| 1998 | 74° | 69° | 71° | — | — |
| 1996 | 89° | 66° | 78° | — | — |
| 1995 | 98° | 66° | 82° | — | — |
| 1993 | 93° | 66° | 80° | — | — |
| 1992 | 84° | 64° | 74° | — | — |
| 1991 | 83° | 65° | 74° | — | — |
| 1990 | 63° | 89° | 76° | — | — |
| 1989 | 92° | 58° | 75° | — | — |
| 1988warmest | 109° | 73° | 91° | — | — |
| 1987 | 85° | 65° | 75° | — | — |
| 1986 | 86° | 61° | 73° | — | — |
| 1985 | 76° | 62° | 69° | 0.05" | — |
| 1984 | 103° | 70° | 86° | — | — |
| 1983 | 91° | 62° | 77° | — | — |
| 1982 | 101° | 74° | 87° | — | — |
| 1981 | 86° | 62° | 74° | — | — |
| 1980 | 88° | 62° | 75° | — | — |
| 1979 | 91° | — | — | — | — |
| 1978 | 92° | 69° | 80° | — | — |
| 1977 | 94° | 61° | 77° | — | — |
| 1976 | 91° | 66° | 79° | — | — |
| 1975 | 95° | 63° | 79° | — | — |
| 1974 | 93° | 65° | 79° | — | — |
| 1973 | 74° | 64° | 69° | — | — |
| 1972 | 96° | 69° | 83° | — | — |
| 1971 | 85° | 55° | 70° | — | — |
53 years of data from GILLESPIE FLD