Weather on September 30
El Cajon, CA
55 Years of Data
Avg High
86°F
Avg Low
60°F
Warmest
2020
86°F avg
Coldest
1971
62°F avg
About This Date
September 30th in El Cajon, CA typically brings warm fall weather, with average highs around 86°F and lows near 60°F — a 26°F daily swing. Over 54 years of records, the warmest September 30th was in 2020 (86°F average), while the coldest was 1971 (62°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 30th dates historically, with the wettest September 30th recording 0.71" of rain. 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 30th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 62° | 70° | — | — |
| 2024 | 88° | 52° | 70° | — | — |
| 2023 | 69° | 63° | 66° | — | — |
| 2022 | 80° | 64° | 72° | — | — |
| 2021 | 90° | 57° | 73° | — | — |
| 2020warmest | 107° | 64° | 86° | — | — |
| 2019 | 76° | 49° | 62° | — | — |
| 2018 | 91° | 63° | 77° | — | — |
| 2017 | 81° | 56° | 68° | — | — |
| 2016 | 93° | 66° | 80° | — | — |
| 2015 | 94° | 59° | 76° | — | — |
| 2014 | 88° | 60° | 74° | — | — |
| 2013 | 88° | 51° | 69° | — | — |
| 2012 | 97° | 62° | 79° | — | — |
| 2011 | 87° | 58° | 72° | — | — |
| 2010 | 85° | 69° | 77° | 0.71" | — |
| 2009 | 85° | 60° | 72° | — | — |
| 2008 | 103° | 65° | 84° | — | — |
| 2007 | 80° | 56° | 68° | — | — |
| 2006 | 91° | 55° | 73° | — | — |
| 2005 | 95° | 64° | 80° | — | — |
| 2004 | 76° | 58° | 67° | — | — |
| 2003 | 74° | 63° | 68° | — | — |
| 2002 | 74° | 54° | 64° | — | — |
| 2001 | 97° | 62° | 79° | — | — |
| 2000 | 80° | 65° | 72° | — | — |
| 1999 | 101° | 58° | 79° | — | — |
| 1998 | 71° | 59° | 65° | — | — |
| 1996 | 82° | 59° | 71° | — | — |
| 1995 | 93° | 54° | 73° | — | — |
| 1994 | 77° | 62° | 70° | — | — |
| 1993 | 93° | 61° | 77° | — | — |
| 1992 | 100° | 61° | 80° | — | — |
| 1991 | 91° | 62° | 77° | — | — |
| 1990 | 83° | 63° | 73° | — | — |
| 1989 | 85° | 58° | 71° | — | — |
| 1988 | 80° | 57° | 69° | — | — |
| 1987 | 95° | 63° | 79° | — | — |
| 1986 | 83° | 53° | 68° | — | — |
| 1985 | 82° | 65° | 73° | — | — |
| 1984 | 94° | 62° | 78° | — | — |
| 1983 | 76° | 53° | 64° | 0.18" | — |
| 1982 | 77° | 49° | 63° | — | — |
| 1981 | 78° | 61° | 69° | — | — |
| 1980 | 105° | 58° | 81° | — | — |
| 1979 | 79° | 62° | 70° | — | — |
| 1978 | 87° | 63° | 75° | — | — |
| 1977 | 80° | 66° | 73° | — | — |
| 1976 | 81° | 64° | 72° | — | — |
| 1975 | 77° | 61° | 69° | — | — |
| 1974 | 83° | 60° | 71° | — | — |
| 1973 | 87° | 58° | 72° | — | — |
| 1972 | 92° | 58° | 75° | — | — |
| 1971coldest | 72° | 53° | 62° | — | — |
54 years of data from GILLESPIE FLD