Weather on March 31
San Marcos, CA
55 Years of Data
Avg High
72°F
Avg Low
48°F
Warmest
2005
72°F avg
Coldest
1977
48°F avg
About This Date
March 31st in San Marcos, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 48°F. Over 56 years of records, the warmest March 31st was in 2005 (72°F average), while the coldest was 1977 (48°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 11% of March 31st dates historically, with the wettest March 31st recording 1.45" 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 March 31st in San Marcos, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 69° | 63° | 66° | — | — |
| 2025 | 63° | 54° | 58° | 0.43" | — |
| 2024 | 61° | 49° | 55° | 1.42" | — |
| 2023 | 66° | 42° | 54° | — | — |
| 2022 | 64° | 55° | 60° | — | — |
| 2021 | 88° | 50° | 69° | — | — |
| 2020 | 77° | 53° | 65° | — | — |
| 2019 | 87° | 51° | 69° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 71° | 49° | 60° | — | — |
| 2016 | 69° | 44° | 57° | — | — |
| 2015 | 80° | 54° | 67° | — | — |
| 2014 | 71° | 47° | 59° | — | — |
| 2013 | 72° | 51° | 61° | — | — |
| 2012 | 60° | 53° | 57° | — | — |
| 2011 | 90° | 55° | 72° | — | — |
| 2010 | 60° | 50° | 55° | — | — |
| 2009 | 65° | 49° | 57° | — | — |
| 2008 | 59° | 50° | 55° | — | — |
| 2007 | 68° | 48° | 58° | — | — |
| 2006 | 59° | 51° | 55° | — | — |
| 2005warmest | 75° | 68° | 72° | — | — |
| 2004 | 63° | 55° | 59° | — | — |
| 2003 | 87° | 35° | 61° | — | — |
| 2002 | 73° | 50° | 62° | — | — |
| 2001 | 78° | 56° | 67° | — | — |
| 2000 | 79° | 43° | 61° | — | — |
| 1999 | 63° | 49° | 56° | — | — |
| 1998 | 59° | 43° | 51° | — | — |
| 1997 | 67° | 55° | 61° | — | — |
| 1996 | 75° | 43° | 59° | — | — |
| 1995 | 80° | 43° | 61° | — | — |
| 1994 | 76° | 52° | 64° | — | — |
| 1993 | 74° | 46° | 60° | — | — |
| 1992 | 69° | 52° | 60° | 0.3" | — |
| 1991 | 75° | 44° | 60° | — | — |
| 1990 | 64° | 46° | 55° | — | — |
| 1989 | 87° | 53° | 70° | — | — |
| 1988 | 76° | 47° | 61° | — | — |
| 1987 | 89° | 44° | 67° | — | — |
| 1986 | 79° | 52° | 65° | — | — |
| 1985 | 78° | 40° | 59° | — | — |
| 1984 | 68° | 45° | 56° | 0.05" | — |
| 1983 | 73° | 49° | 61° | — | — |
| 1982 | 68° | 39° | 54° | — | — |
| 1981 | 73° | 44° | 59° | — | — |
| 1980 | 72° | 46° | 59° | — | — |
| 1979 | 73° | 39° | 56° | — | — |
| 1978 | 67° | 50° | 58° | 1.45" | — |
| 1977coldest | 58° | 39° | 48° | — | — |
| 1976 | 80° | 42° | 61° | — | — |
| 1975 | 66° | 42° | 54° | 0.33" | — |
| 1974 | 69° | 49° | 59° | — | — |
| 1973 | 63° | 45° | 54° | — | — |
| 1972 | 81° | 39° | 60° | — | — |
| 1971 | 74° | 52° | 63° | — | — |
56 years of data from ESCONDIDO #2