Weather on August 17
El Cajon, CA
55 Years of Data
Avg High
87°F
Avg Low
65°F
Warmest
1992
87°F avg
Coldest
1978
66°F avg
About This Date
August 17th in El Cajon, CA typically brings warm summer weather, with average highs around 87°F and lows near 65°F. Over 55 years of records, the warmest August 17th was in 1992 (87°F average), while the coldest was 1978 (66°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 17th dates historically, with the wettest August 17th recording 3.81" 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 August 17th in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 61° | 72° | — | — |
| 2024 | 83° | 65° | 74° | — | — |
| 2023 | 95° | 67° | 81° | — | — |
| 2022 | 91° | 66° | 79° | — | — |
| 2021 | 83° | 69° | 76° | — | — |
| 2020 | 98° | 72° | 85° | — | — |
| 2019 | 83° | 62° | 72° | — | — |
| 2018 | 88° | 71° | 79° | — | — |
| 2017 | 84° | 61° | 72° | — | — |
| 2016 | 102° | 66° | 84° | — | — |
| 2015 | 86° | 70° | 78° | — | — |
| 2014 | 95° | 67° | 81° | — | — |
| 2013 | 90° | 65° | 77° | — | — |
| 2012 | 97° | 68° | 82° | — | — |
| 2011 | 88° | 66° | 77° | — | — |
| 2010 | 95° | 65° | 80° | — | — |
| 2009 | 83° | 60° | 71° | — | — |
| 2008 | 90° | 68° | 79° | — | — |
| 2007 | 84° | 66° | 75° | — | — |
| 2006 | 89° | 61° | 75° | — | — |
| 2005 | 81° | 62° | 71° | — | — |
| 2004 | 85° | 62° | 73° | — | — |
| 2003 | 99° | 68° | 83° | — | — |
| 2002 | 81° | 64° | 72° | — | — |
| 2001 | 97° | 65° | 81° | — | — |
| 2000 | 99° | 67° | 83° | — | — |
| 1999 | 94° | 62° | 78° | — | — |
| 1998 | 81° | 68° | 74° | — | — |
| 1997 | 85° | 67° | 76° | — | — |
| 1996 | 91° | 67° | 79° | — | — |
| 1995 | 85° | 61° | 73° | — | — |
| 1994 | 89° | 69° | 79° | — | — |
| 1993 | 83° | 61° | 72° | — | — |
| 1992warmest | 102° | 72° | 87° | — | — |
| 1991 | 84° | 66° | 75° | — | — |
| 1990 | 83° | 63° | 73° | — | — |
| 1989 | 82° | 64° | 73° | — | — |
| 1988 | 83° | 61° | 72° | — | — |
| 1987 | 77° | 63° | 70° | — | — |
| 1986 | 93° | 62° | 78° | 0.33" | — |
| 1985 | 75° | 66° | 71° | — | — |
| 1984 | 87° | 69° | 78° | — | — |
| 1983 | 92° | 73° | 82° | — | — |
| 1982 | 90° | 61° | 75° | — | — |
| 1981 | 88° | 66° | 77° | — | — |
| 1980 | 83° | 64° | 73° | — | — |
| 1979 | 82° | 64° | 73° | — | — |
| 1978coldest | 75° | 58° | 66° | — | — |
| 1977 | 78° | 72° | 75° | 3.81" | — |
| 1976 | 77° | 57° | 67° | — | — |
| 1975 | 82° | 58° | 70° | — | — |
| 1974 | 89° | 54° | 71° | — | — |
| 1973 | 85° | 63° | 74° | — | — |
| 1972 | 80° | 54° | 67° | — | — |
| 1971 | 84° | 66° | 75° | — | — |
55 years of data from GILLESPIE FLD