Weather on August 12
San Marcos, CA
55 Years of Data
Avg High
88°F
Avg Low
65°F
Warmest
1994
92°F avg
Coldest
2010
65°F avg
About This Date
August 12th in San Marcos, CA typically brings warm summer weather, with average highs around 88°F and lows near 65°F. Over 55 years of records, the warmest August 12th was in 1994 (92°F average), while the coldest was 2010 (65°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for August 12th 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 | 89° | 64° | 77° | — | — |
| 2024 | 97° | 71° | 84° | — | — |
| 2023 | 87° | 67° | 77° | — | — |
| 2022 | 95° | 68° | 82° | — | — |
| 2021 | 98° | 71° | 85° | — | — |
| 2020 | 90° | 62° | 76° | — | — |
| 2019 | 85° | 61° | 73° | — | — |
| 2018 | 92° | 72° | 82° | — | — |
| 2017 | 90° | 67° | 78° | — | — |
| 2016 | 86° | 66° | 76° | — | — |
| 2015 | 88° | 61° | 74° | — | — |
| 2014 | 87° | 68° | 78° | — | — |
| 2013 | 86° | 61° | 73° | — | — |
| 2012 | 95° | 72° | 83° | — | — |
| 2011 | 80° | 61° | 70° | — | — |
| 2010coldest | 70° | 61° | 65° | — | — |
| 2009 | 72° | 65° | 68° | — | — |
| 2008 | 73° | 64° | 69° | — | — |
| 2007 | 91° | 63° | 77° | — | — |
| 2006 | 76° | 68° | 72° | — | — |
| 2005 | 73° | 65° | 69° | — | — |
| 2004 | 94° | 63° | 78° | — | — |
| 2003 | 99° | 68° | 83° | — | — |
| 2002 | 92° | 65° | 78° | — | — |
| 2001 | 87° | 64° | 76° | — | — |
| 2000 | 100° | 65° | 82° | — | — |
| 1999 | 85° | 57° | 71° | — | — |
| 1998 | 94° | 71° | 82° | — | — |
| 1997 | 82° | 63° | 72° | — | — |
| 1996 | 94° | 66° | 80° | — | — |
| 1995 | 94° | 67° | 80° | — | — |
| 1994warmest | 109° | 75° | 92° | — | — |
| 1993 | 85° | 61° | 73° | — | — |
| 1992 | 94° | 67° | 80° | — | — |
| 1991 | 98° | 69° | 84° | — | — |
| 1990 | 91° | 68° | 80° | — | — |
| 1989 | 88° | 65° | 76° | — | — |
| 1988 | 82° | 68° | 75° | — | — |
| 1987 | 84° | 64° | 74° | — | — |
| 1986 | 87° | 64° | 76° | — | — |
| 1985 | 82° | 59° | 71° | — | — |
| 1984 | 87° | 65° | 76° | — | — |
| 1983 | 90° | 64° | 77° | — | — |
| 1982 | 91° | 63° | 77° | — | — |
| 1981 | 86° | 62° | 74° | — | — |
| 1980 | 91° | 68° | 80° | — | — |
| 1979 | 78° | 62° | 70° | — | — |
| 1978 | 83° | 68° | 75° | — | — |
| 1977 | 85° | 60° | 72° | — | — |
| 1976 | 88° | 52° | 70° | — | — |
| 1975 | 82° | 58° | 70° | — | — |
| 1974 | 81° | 64° | 72° | — | — |
| 1973 | 86° | 60° | 73° | — | — |
| 1972 | 85° | 68° | 76° | — | — |
| 1971 | 92° | 64° | 78° | — | — |
55 years of data from ESCONDIDO #2