Weather on May 20
El Cajon, CA
55 Years of Data
Avg High
77°F
Avg Low
56°F
Warmest
2005
78°F avg
Coldest
1975
55°F avg
About This Date
May 20th in El Cajon, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 56°F. Over 55 years of records, the warmest May 20th was in 2005 (78°F average), while the coldest was 1975 (55°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 20th dates historically, with the wettest May 20th recording 0.89" of rain. The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in El Cajon, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 55° | 72° | — | — |
| 2024 | 73° | 54° | 63° | — | — |
| 2023 | 74° | 61° | 67° | — | — |
| 2022 | 67° | 57° | 62° | — | — |
| 2021 | 68° | 57° | 63° | — | — |
| 2020 | 76° | 50° | 63° | — | — |
| 2019 | 67° | 54° | 60° | 0.89" | — |
| 2018 | 70° | 59° | 64° | — | — |
| 2017 | 94° | 56° | 75° | — | — |
| 2016 | 74° | 60° | 67° | — | — |
| 2015 | 71° | 56° | 63° | — | — |
| 2014 | 70° | 59° | 64° | — | — |
| 2013 | 79° | 59° | 69° | — | — |
| 2012 | 82° | 57° | 70° | — | — |
| 2011 | 74° | 56° | 65° | — | — |
| 2010 | 85° | 54° | 69° | — | — |
| 2009 | 83° | 59° | 71° | — | — |
| 2008 | 91° | 63° | 77° | — | — |
| 2007 | 67° | 57° | 62° | — | — |
| 2006 | 81° | 59° | 70° | — | — |
| 2005warmest | 89° | 66° | 78° | — | — |
| 2004 | 79° | 57° | 68° | — | — |
| 2003 | 88° | 55° | 71° | — | — |
| 2002 | 70° | 57° | 63° | — | — |
| 2001 | 88° | 59° | 73° | — | — |
| 2000 | 91° | 55° | 73° | — | — |
| 1999 | 73° | 57° | 65° | — | — |
| 1998 | 74° | 55° | 64° | — | — |
| 1997 | 80° | 60° | 70° | — | — |
| 1996 | 78° | 59° | 69° | — | — |
| 1995 | 71° | 56° | 63° | — | — |
| 1994 | 74° | 48° | 61° | — | — |
| 1993 | 76° | 62° | 69° | — | — |
| 1992 | 75° | 61° | 68° | — | — |
| 1991 | 71° | 48° | 60° | — | — |
| 1990 | 73° | 54° | 63° | — | — |
| 1989 | 85° | 53° | 69° | — | — |
| 1988 | 93° | 57° | 75° | — | — |
| 1987 | 67° | 50° | 58° | — | — |
| 1986 | 78° | 57° | 68° | — | — |
| 1985 | 74° | 58° | 66° | — | — |
| 1984 | 80° | 53° | 67° | — | — |
| 1983 | 89° | 50° | 70° | — | — |
| 1982 | 72° | 59° | 65° | — | — |
| 1981 | 70° | 55° | 62° | — | — |
| 1980 | 77° | 57° | 67° | — | — |
| 1979 | 65° | 56° | 60° | 0.15" | — |
| 1978 | 83° | 58° | 70° | — | — |
| 1977 | 80° | 53° | 67° | — | — |
| 1976 | 73° | 56° | 64° | — | — |
| 1975coldest | 58° | 52° | 55° | 0.1" | — |
| 1974 | 76° | 41° | 58° | — | — |
| 1973 | 72° | 56° | 64° | — | — |
| 1972 | 67° | 49° | 58° | 0.64" | — |
| 1971 | 80° | 48° | 64° | — | — |
55 years of data from GILLESPIE FLD