Weather on May 18
El Cajon, CA
55 Years of Data
Avg High
77°F
Avg Low
56°F
Warmest
1992
79°F avg
Coldest
2011
58°F avg
About This Date
May 18th 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 18th was in 1992 (79°F average), while the coldest was 2011 (58°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 18th dates historically, with the wettest May 18th recording 0.51" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in El Cajon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 55° | 61° | 0.23" | — |
| 2024 | 76° | 58° | 67° | — | — |
| 2023 | 76° | 57° | 66° | — | — |
| 2022 | 73° | 56° | 64° | — | — |
| 2021 | 74° | 57° | 65° | 0.05" | — |
| 2020 | 76° | 62° | 69° | — | — |
| 2019 | 73° | 49° | 61° | — | — |
| 2018 | 69° | 55° | 62° | 0.05" | — |
| 2017 | 75° | 57° | 66° | — | — |
| 2016 | 78° | 61° | 69° | — | — |
| 2015 | 69° | 58° | 63° | — | — |
| 2014 | 76° | 60° | 68° | — | — |
| 2013 | 73° | 59° | 66° | — | — |
| 2012 | 69° | 57° | 63° | — | — |
| 2011coldest | 63° | 54° | 58° | 0.51" | — |
| 2010 | 74° | 55° | 64° | — | — |
| 2009 | 84° | 59° | 72° | — | — |
| 2008 | 95° | 63° | 79° | — | — |
| 2007 | 69° | 56° | 62° | — | — |
| 2006 | 79° | 61° | 70° | — | — |
| 2005 | 80° | 56° | 68° | — | — |
| 2004 | 75° | 56° | 65° | — | — |
| 2003 | 82° | 51° | 67° | — | — |
| 2002 | 72° | 59° | 65° | — | — |
| 2001 | 78° | 59° | 69° | — | — |
| 2000 | 81° | 52° | 66° | — | — |
| 1999 | 78° | 54° | 66° | — | — |
| 1998 | 82° | 49° | 65° | — | — |
| 1997 | 78° | 63° | 70° | — | — |
| 1996 | 86° | 57° | 72° | — | — |
| 1995 | 75° | 51° | 63° | — | — |
| 1994 | 69° | 53° | 61° | — | — |
| 1993 | 78° | 59° | 69° | — | — |
| 1992warmest | 80° | 78° | 79° | — | — |
| 1991 | 71° | 56° | 63° | — | — |
| 1990 | 73° | 57° | 65° | — | — |
| 1989 | 76° | 58° | 67° | — | — |
| 1988 | 77° | 57° | 67° | — | — |
| 1987 | 72° | 60° | 66° | — | — |
| 1986 | 93° | 55° | 74° | — | — |
| 1985 | 75° | — | — | — | — |
| 1984 | 82° | 52° | 67° | — | — |
| 1983 | 94° | 49° | 71° | — | — |
| 1982 | 72° | 60° | 66° | — | — |
| 1981 | 83° | 52° | 67° | — | — |
| 1980 | 79° | 58° | 68° | — | — |
| 1979 | 75° | 53° | 64° | — | — |
| 1978 | 92° | 51° | 71° | — | — |
| 1977 | 74° | 52° | 63° | — | — |
| 1976 | 83° | 56° | 69° | — | — |
| 1975 | 72° | 58° | 65° | — | — |
| 1974 | 67° | 51° | 59° | — | — |
| 1973 | 77° | 58° | 67° | — | — |
| 1972 | 67° | 57° | 62° | — | — |
| 1971 | 87° | 47° | 67° | — | — |
55 years of data from GILLESPIE FLD