Weather on May 31
San Marcos, CA
55 Years of Data
Avg High
77°F
Avg Low
57°F
Warmest
1997
76°F avg
Coldest
1980
60°F avg
About This Date
May 31st in San Marcos, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 57°F. Over 55 years of records, the warmest May 31st was in 1997 (76°F average), while the coldest was 1980 (60°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 31st dates historically. 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 31st in San Marcos, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 63° | 76° | — | — |
| 2024 | 78° | 58° | 68° | — | — |
| 2023 | 65° | 56° | 60° | 0.3" | — |
| 2022 | 81° | 59° | 70° | — | — |
| 2021 | 80° | 58° | 69° | — | — |
| 2020 | 82° | 59° | 71° | — | — |
| 2019 | 77° | 59° | 68° | — | — |
| 2018 | 76° | 60° | 68° | — | — |
| 2017 | 73° | 60° | 67° | — | — |
| 2016 | 74° | 59° | 66° | — | — |
| 2015 | 79° | 60° | 69° | — | — |
| 2014 | 86° | 57° | 72° | — | — |
| 2013 | 82° | 60° | 71° | — | — |
| 2012 | 80° | 56° | 68° | — | — |
| 2011 | 79° | 51° | 65° | — | — |
| 2010 | 65° | 58° | 61° | — | — |
| 2009 | 63° | 59° | 61° | — | — |
| 2008 | 65° | 60° | 62° | — | — |
| 2007 | 76° | 52° | 64° | — | — |
| 2006 | 74° | 61° | 67° | — | — |
| 2005 | 69° | 59° | 64° | — | — |
| 2004 | 93° | 56° | 74° | — | — |
| 2003 | 78° | 60° | 69° | — | — |
| 2002 | 82° | 59° | 71° | — | — |
| 2001 | 68° | 60° | 64° | — | — |
| 2000 | 80° | 59° | 70° | — | — |
| 1999 | 78° | 54° | 66° | — | — |
| 1998 | 77° | 53° | 65° | — | — |
| 1997warmest | 90° | 62° | 76° | — | — |
| 1996 | 78° | 52° | 65° | — | — |
| 1995 | 83° | 57° | 70° | — | — |
| 1994 | 78° | 58° | 68° | — | — |
| 1993 | 80° | 60° | 70° | — | — |
| 1992 | 84° | 65° | 74° | — | — |
| 1991 | 68° | 52° | 60° | — | — |
| 1990 | 71° | 56° | 63° | — | — |
| 1989 | 78° | 53° | 66° | — | — |
| 1988 | 76° | 48° | 62° | — | — |
| 1987 | 83° | 55° | 69° | — | — |
| 1986 | 76° | 57° | 66° | — | — |
| 1985 | 75° | 56° | 65° | — | — |
| 1984 | 82° | 63° | 72° | — | — |
| 1983 | 76° | 59° | 67° | — | — |
| 1982 | 73° | 52° | 62° | — | — |
| 1981 | 81° | 60° | 70° | — | — |
| 1980coldest | 69° | 51° | 60° | — | — |
| 1979 | 74° | 56° | 65° | — | — |
| 1978 | 77° | 54° | 65° | — | — |
| 1977 | 85° | 54° | 69° | — | — |
| 1976 | 77° | 55° | 66° | — | — |
| 1975 | 79° | 57° | 68° | — | — |
| 1974 | 74° | 55° | 64° | — | — |
| 1973 | 64° | 58° | 61° | 0.13" | — |
| 1972 | 89° | 60° | 75° | — | — |
| 1971 | 69° | 54° | 61° | — | — |
55 years of data from ESCONDIDO #2