Weather on August 20
El Cajon, CA
55 Years of Data
Avg High
87°F
Avg Low
64°F
Warmest
1986
85°F avg
Coldest
1979
69°F avg
About This Date
August 20th in El Cajon, CA typically brings warm summer weather, with average highs around 87°F and lows near 64°F. Over 55 years of records, the warmest August 20th was in 1986 (85°F average), while the coldest was 1979 (69°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 20th dates historically, with the wettest August 20th recording 3.05" 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 20th 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° | 61° | 76° | — | — |
| 2024 | 99° | 64° | 81° | — | — |
| 2023 | 75° | 71° | 73° | 3.05" | — |
| 2022 | 82° | 65° | 73° | — | — |
| 2021 | 79° | 68° | 73° | — | — |
| 2020 | 96° | 71° | 84° | — | — |
| 2019 | 90° | 62° | 76° | — | — |
| 2018 | 85° | 70° | 77° | — | — |
| 2017 | 81° | 65° | 73° | — | — |
| 2016 | 88° | 66° | 77° | — | — |
| 2015 | 83° | 68° | 75° | — | — |
| 2014 | 83° | 67° | 75° | — | — |
| 2013 | 89° | 62° | 76° | — | — |
| 2012 | 87° | 70° | 78° | — | — |
| 2011 | 84° | 61° | 72° | — | — |
| 2010 | 97° | 68° | 82° | — | — |
| 2009 | 86° | 63° | 74° | — | — |
| 2008 | 87° | 61° | 74° | — | — |
| 2007 | 93° | 67° | 80° | — | — |
| 2006 | 86° | 62° | 74° | — | — |
| 2005 | 82° | 61° | 71° | — | — |
| 2004 | 86° | 63° | 74° | — | — |
| 2003 | 88° | 65° | 76° | — | — |
| 2002 | 80° | 64° | 72° | — | — |
| 2001 | 92° | 64° | 78° | — | — |
| 2000 | 100° | 55° | 78° | — | — |
| 1999 | 91° | 60° | 76° | — | — |
| 1998 | 86° | 63° | 74° | — | — |
| 1997 | 96° | 71° | 84° | — | — |
| 1996 | 87° | 62° | 75° | — | — |
| 1995 | 82° | 66° | 74° | — | — |
| 1994 | 87° | 68° | 78° | — | — |
| 1993 | 86° | 58° | 72° | — | — |
| 1992 | 92° | 70° | 81° | — | — |
| 1991 | 85° | 60° | 72° | — | — |
| 1990 | 80° | 59° | 70° | — | — |
| 1989 | 78° | 65° | 71° | — | — |
| 1988 | 81° | 63° | 72° | — | — |
| 1987 | 82° | 61° | 71° | — | — |
| 1986warmest | 98° | 71° | 85° | — | — |
| 1985 | 83° | 61° | 72° | — | — |
| 1984 | 83° | 69° | 76° | — | — |
| 1983 | 84° | 66° | 75° | — | — |
| 1982 | 98° | 61° | 79° | — | — |
| 1981 | 96° | 63° | 79° | — | — |
| 1980 | 86° | 61° | 73° | — | — |
| 1979coldest | 80° | 58° | 69° | — | — |
| 1978 | 87° | 57° | 72° | — | — |
| 1977 | 95° | 67° | 81° | — | — |
| 1976 | 85° | 63° | 74° | — | — |
| 1975 | 81° | 61° | 71° | — | — |
| 1974 | 77° | 64° | 71° | — | — |
| 1973 | 92° | 70° | 81° | — | — |
| 1972 | 89° | 57° | 73° | — | — |
| 1971 | 85° | 67° | 76° | — | — |
55 years of data from GILLESPIE FLD