Weather on September 15
El Cajon, CA
55 Years of Data
About This Date
September 15th in El Cajon, CA typically brings warm fall weather, with average highs around 85°F and lows near 63°F. Over 54 years of records, the warmest September 15th was in 1989 (100°F average), while the coldest was 1978 (65°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 15th 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 15th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 64° | 77° | — | — |
| 2024 | 72° | 64° | 68° | — | — |
| 2023 | 78° | 64° | 71° | — | — |
| 2022 | 80° | 61° | 70° | — | — |
| 2021 | 83° | 61° | 72° | — | — |
| 2020 | 98° | 60° | 79° | — | — |
| 2019 | 98° | 65° | 81° | — | — |
| 2018 | 91° | 60° | 76° | — | — |
| 2017 | 76° | 66° | 71° | — | — |
| 2016 | 84° | 53° | 69° | — | — |
| 2015 | 80° | 72° | 76° | 0.3" | — |
| 2014 | 102° | 73° | 88° | — | — |
| 2013 | 95° | 63° | 79° | — | — |
| 2012 | 103° | 66° | 84° | — | — |
| 2011 | 80° | 63° | 71° | — | — |
| 2010 | 88° | 58° | 73° | — | — |
| 2009 | 81° | 63° | 72° | — | — |
| 2008 | 96° | 61° | 78° | — | — |
| 2007 | 80° | 61° | 70° | — | — |
| 2006 | 73° | 58° | 65° | — | — |
| 2005 | 74° | 59° | 66° | — | — |
| 2004 | 83° | 67° | 75° | — | — |
| 2003 | 88° | 64° | 76° | — | — |
| 2002 | 96° | 60° | 78° | — | — |
| 2001 | 90° | 62° | 76° | — | — |
| 2000 | 97° | 64° | 80° | — | — |
| 1999 | 78° | 59° | 69° | — | — |
| 1998 | 76° | 64° | 70° | — | — |
| 1996 | 76° | 63° | 69° | — | — |
| 1995 | 90° | 62° | 76° | — | — |
| 1994 | 83° | 60° | 71° | — | — |
| 1993 | 71° | 63° | 67° | — | — |
| 1992 | 88° | 64° | 76° | — | — |
| 1991 | 78° | 62° | 70° | — | — |
| 1990 | 86° | 67° | 76° | — | — |
| 1989warmest | 108° | 93° | 100° | — | — |
| 1988 | 78° | 62° | 70° | — | — |
| 1987 | 86° | 56° | 71° | — | — |
| 1986 | 77° | 56° | 66° | — | — |
| 1985 | 85° | 54° | 69° | — | — |
| 1984 | 95° | 68° | 82° | — | — |
| 1983 | 92° | 62° | 77° | — | — |
| 1982 | 79° | 65° | 72° | — | — |
| 1981 | 92° | 60° | 76° | — | — |
| 1980 | 83° | 52° | 67° | — | — |
| 1979 | 104° | 70° | 87° | — | — |
| 1978coldest | 76° | 54° | 65° | — | — |
| 1977 | 79° | 64° | 71° | — | — |
| 1976 | 74° | 64° | 69° | — | — |
| 1975 | 91° | 63° | 77° | — | — |
| 1974 | 84° | 56° | 70° | — | — |
| 1973 | 79° | 63° | 71° | — | — |
| 1972 | 82° | 59° | 71° | — | — |
| 1971 | 81° | 67° | 74° | — | — |
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
Most pleasant months in El Cajon, CA: January, February, March, April, May, June, October, November, December.
What to expect on September 15th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 15th outlook →