Weather on October 15
San Marcos, CA
55 Years of Data
Avg High
80°F
Avg Low
56°F
Warmest
1991
83°F avg
Coldest
1988
54°F avg
About This Date
October 15th in San Marcos, CA typically brings warm fall weather, with average highs around 80°F and lows near 56°F. Over 55 years of records, the warmest October 15th was in 1991 (83°F average), while the coldest was 1988 (54°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 9% of October 15th dates historically. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for October 15th in San Marcos, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 51° | 60° | 0.05" | — |
| 2024 | 75° | 63° | 69° | — | — |
| 2023 | 91° | 56° | 73° | — | — |
| 2022 | 69° | 61° | 65° | — | — |
| 2021 | 90° | 51° | 70° | — | — |
| 2020 | 99° | 63° | 81° | — | — |
| 2019 | 84° | 54° | 69° | — | — |
| 2018 | 80° | 54° | 67° | — | — |
| 2017 | 97° | 54° | 75° | — | — |
| 2016 | 77° | 58° | 67° | — | — |
| 2015 | 83° | 72° | 77° | — | — |
| 2014 | 79° | 65° | 72° | — | — |
| 2013 | 87° | 52° | 69° | — | — |
| 2012 | 91° | 59° | 75° | — | — |
| 2011 | 81° | 60° | 70° | — | — |
| 2010 | 67° | 62° | 64° | — | — |
| 2009 | 71° | 60° | 66° | 0.03" | — |
| 2008 | 85° | 57° | 71° | — | — |
| 2007 | 64° | 60° | 62° | 0.03" | — |
| 2006 | 67° | 57° | 62° | 0.03" | — |
| 2005 | 70° | 58° | 64° | — | — |
| 2004 | 81° | 57° | 69° | — | — |
| 2003 | 69° | 60° | 65° | — | — |
| 2002 | 67° | 55° | 61° | — | — |
| 2001 | 87° | 54° | 70° | — | — |
| 2000 | 70° | 53° | 61° | — | — |
| 1999 | 82° | 56° | 69° | — | — |
| 1998 | 72° | 58° | 65° | — | — |
| 1997 | 98° | 55° | 77° | — | — |
| 1996 | 80° | 56° | 68° | — | — |
| 1995 | 80° | 59° | 70° | — | — |
| 1994 | 70° | 57° | 63° | — | — |
| 1993 | 77° | 56° | 66° | — | — |
| 1992 | 76° | 64° | 70° | — | — |
| 1991warmest | 84° | 83° | 83° | — | — |
| 1990 | 77° | 60° | 69° | — | — |
| 1989 | 75° | 56° | 65° | — | — |
| 1988coldest | 78° | 31° | 54° | — | — |
| 1987 | 75° | 59° | 67° | — | — |
| 1986 | 82° | 50° | 66° | — | — |
| 1985 | 88° | 54° | 71° | — | — |
| 1984 | 77° | 61° | 69° | — | — |
| 1983 | 74° | 61° | 67° | — | — |
| 1982 | 88° | 54° | 71° | — | — |
| 1981 | 70° | 49° | 59° | — | — |
| 1980 | 70° | 51° | 60° | 0.05" | — |
| 1979 | 77° | 57° | 67° | — | — |
| 1978 | 89° | 54° | 71° | — | — |
| 1977 | 84° | 53° | 69° | — | — |
| 1976 | 77° | 58° | 67° | — | — |
| 1975 | 86° | 46° | 66° | — | — |
| 1974 | 95° | 50° | 73° | — | — |
| 1973 | 90° | 47° | 68° | — | — |
| 1972 | 78° | 48° | 63° | — | — |
| 1971 | 76° | 57° | 66° | — | — |
55 years of data from ESCONDIDO #2