Weather on May 15
San Marcos, CA
55 Years of Data
Avg High
75°F
Avg Low
55°F
Warmest
2014
83°F avg
Coldest
2003
56°F avg
About This Date
May 15th in San Marcos, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 55°F. Over 55 years of records, the warmest May 15th was in 2014 (83°F average), while the coldest was 2003 (56°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 15th dates historically, with the wettest May 15th recording 1.19" 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 May 15th in San Marcos, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 55° | 67° | — | — |
| 2024 | 67° | 58° | 62° | — | — |
| 2023 | 77° | 60° | 69° | — | — |
| 2022 | 90° | 58° | 74° | — | — |
| 2021 | 74° | 57° | 65° | — | — |
| 2020 | 81° | 60° | 70° | — | — |
| 2019 | 71° | 59° | 65° | — | — |
| 2018 | 76° | 54° | 65° | — | — |
| 2017 | 67° | 54° | 60° | — | — |
| 2016 | 74° | 59° | 66° | — | — |
| 2015 | 66° | 52° | 59° | 1.19" | — |
| 2014warmest | 104° | 62° | 83° | — | — |
| 2013 | 80° | 59° | 70° | — | — |
| 2012 | 77° | 54° | 65° | — | — |
| 2011 | 64° | 54° | 59° | — | — |
| 2010 | 64° | 57° | 61° | — | — |
| 2009 | 67° | 58° | 62° | — | — |
| 2008 | 71° | 57° | 64° | — | — |
| 2007 | 62° | 57° | 60° | — | — |
| 2006 | 68° | 60° | 64° | — | — |
| 2005 | 79° | 57° | 68° | — | — |
| 2004 | 90° | 53° | 71° | — | — |
| 2003coldest | 72° | 41° | 56° | — | — |
| 2002 | 78° | 57° | 68° | — | — |
| 2001 | 77° | 57° | 67° | — | — |
| 2000 | 72° | 50° | 61° | — | — |
| 1999 | 71° | 55° | 63° | — | — |
| 1998 | 72° | 47° | 59° | — | — |
| 1997 | 94° | 59° | 76° | — | — |
| 1996 | 84° | 61° | 72° | — | — |
| 1995 | 69° | 50° | 60° | 0.41" | — |
| 1994 | 68° | 57° | 63° | — | — |
| 1993 | 86° | 61° | 73° | — | — |
| 1992 | 76° | 61° | 68° | — | — |
| 1991 | 77° | 49° | 63° | — | — |
| 1990 | 69° | 57° | 63° | — | — |
| 1989 | 62° | 53° | 58° | 0.03" | — |
| 1988 | 82° | 53° | 68° | — | — |
| 1987 | 78° | 58° | 68° | — | — |
| 1986 | 73° | 56° | 64° | — | — |
| 1985 | 82° | 50° | 66° | — | — |
| 1984 | 73° | 53° | 63° | — | — |
| 1983 | 78° | 55° | 67° | — | — |
| 1982 | 75° | 55° | 65° | — | — |
| 1981 | 69° | 55° | 62° | 0.03" | — |
| 1980 | 68° | 56° | 62° | — | — |
| 1979 | 88° | 55° | 71° | — | — |
| 1978 | 78° | 60° | 69° | — | — |
| 1977 | 65° | 51° | 58° | — | — |
| 1976 | 85° | 53° | 69° | — | — |
| 1975 | 65° | 55° | 60° | — | — |
| 1974 | 70° | 55° | 62° | — | — |
| 1973 | 76° | 55° | 65° | — | — |
| 1972 | 83° | 54° | 68° | — | — |
| 1971 | 75° | 53° | 64° | — | — |
55 years of data from ESCONDIDO #2