Weather on September 1
El Cajon, CA
55 Years of Data
Avg High
88°F
Avg Low
64°F
Warmest
2017
88°F avg
Coldest
1973
67°F avg
About This Date
September 1st in El Cajon, CA typically brings warm fall weather, with average highs around 88°F and lows near 64°F. Over 54 years of records, the warmest September 1st was in 2017 (88°F average), while the coldest was 1973 (67°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 1st dates historically. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for September 1st 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 | 93° | 66° | 80° | — | — |
| 2024 | 88° | 64° | 76° | — | — |
| 2023 | 83° | 67° | 75° | — | — |
| 2022 | 97° | 70° | 83° | — | — |
| 2021 | 80° | 67° | 73° | — | — |
| 2020 | 85° | 66° | 75° | — | — |
| 2019 | 92° | 67° | 79° | — | — |
| 2018 | 79° | 67° | 73° | — | — |
| 2017warmest | 106° | 71° | 88° | — | — |
| 2016 | 84° | 67° | 75° | — | — |
| 2015 | 81° | 68° | 74° | — | — |
| 2014 | 85° | 66° | 75° | — | — |
| 2013 | 90° | 74° | 82° | — | — |
| 2012 | 98° | 64° | 81° | — | — |
| 2011 | 87° | 60° | 74° | — | — |
| 2010 | 88° | 58° | 73° | — | — |
| 2009 | 96° | 68° | 82° | — | — |
| 2008 | 85° | 67° | 76° | — | — |
| 2007 | 96° | 70° | 83° | — | — |
| 2006 | 96° | 61° | 78° | — | — |
| 2005 | 76° | 60° | 68° | — | — |
| 2004 | 99° | 60° | 79° | — | — |
| 2003 | 86° | 78° | 82° | — | — |
| 2002 | 97° | 72° | 84° | — | — |
| 2001 | 88° | 62° | 75° | — | — |
| 2000 | 80° | 59° | 70° | — | — |
| 1999 | 83° | 60° | 71° | — | — |
| 1998 | 93° | 71° | 82° | — | — |
| 1996 | — | 63° | — | — | — |
| 1995 | 97° | 67° | 82° | — | — |
| 1994 | 80° | 62° | 71° | — | — |
| 1993 | 84° | 64° | 74° | — | — |
| 1992 | 80° | 64° | 72° | — | — |
| 1991 | 83° | 64° | 73° | — | — |
| 1990 | 84° | 61° | 72° | — | — |
| 1989 | 92° | 56° | 74° | — | — |
| 1988 | 91° | 67° | 79° | — | — |
| 1987 | 106° | 66° | 86° | 0.13" | — |
| 1986 | 80° | 62° | 71° | — | — |
| 1985 | 94° | 66° | 80° | — | — |
| 1984 | 90° | 66° | 78° | — | — |
| 1983 | 93° | 63° | 78° | 0.15" | — |
| 1982 | 102° | 58° | 80° | — | — |
| 1981 | 85° | 62° | 73° | — | — |
| 1980 | 83° | 63° | 73° | — | — |
| 1979 | 83° | 61° | 72° | — | — |
| 1978 | 88° | 61° | 74° | — | — |
| 1977 | 83° | 63° | 73° | — | — |
| 1976 | 86° | 65° | 75° | — | — |
| 1975 | 83° | 61° | 72° | — | — |
| 1974 | 92° | 59° | 75° | — | — |
| 1973coldest | 79° | 56° | 67° | — | — |
| 1972 | 88° | 68° | 78° | — | — |
| 1971 | 81° | 62° | 71° | — | — |
54 years of data from GILLESPIE FLD