Weather on August 11
San Marcos, CA
55 Years of Data
Avg High
87°F
Avg Low
65°F
Warmest
1994
86°F avg
Coldest
2010
68°F avg
About This Date
August 11th in San Marcos, CA typically brings warm summer weather, with average highs around 87°F and lows near 65°F. Over 55 years of records, the warmest August 11th was in 1994 (86°F average), while the coldest was 2010 (68°F) — a 18°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for August 11th in San Marcos, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 65° | 78° | — | — |
| 2024 | 96° | 71° | 84° | — | — |
| 2023 | 85° | 69° | 77° | — | — |
| 2022 | 94° | 70° | 82° | — | — |
| 2021 | 95° | 70° | 82° | — | — |
| 2020 | 88° | 63° | 75° | — | — |
| 2019 | 86° | 63° | 74° | — | — |
| 2018 | 92° | 72° | 82° | — | — |
| 2017 | 89° | 65° | 77° | — | — |
| 2016 | 85° | 66° | 75° | — | — |
| 2015 | 84° | 65° | 74° | — | — |
| 2014 | 92° | 67° | 79° | — | — |
| 2013 | 85° | 58° | 71° | — | — |
| 2012 | 96° | 72° | 84° | — | — |
| 2011 | 80° | 60° | 70° | — | — |
| 2010coldest | 73° | 63° | 68° | — | — |
| 2009 | 74° | 66° | 70° | — | — |
| 2008 | 73° | 65° | 69° | — | — |
| 2007 | 74° | 66° | 70° | — | — |
| 2006 | 79° | 68° | 73° | — | — |
| 2005 | 73° | 66° | 70° | — | — |
| 2004 | 74° | 66° | 70° | — | — |
| 2003 | 99° | 67° | 83° | — | — |
| 2002 | 92° | 64° | 78° | — | — |
| 2001 | 90° | 62° | 76° | — | — |
| 2000 | 100° | 63° | 81° | — | — |
| 1999 | 80° | 60° | 70° | — | — |
| 1998 | 96° | 71° | 84° | — | — |
| 1997 | 83° | 63° | 73° | — | — |
| 1996 | 90° | 65° | 77° | — | — |
| 1995 | 94° | 62° | 78° | — | — |
| 1994warmest | 99° | 74° | 86° | — | — |
| 1993 | 87° | 61° | 74° | — | — |
| 1992 | 96° | 68° | 82° | — | — |
| 1991 | 89° | 65° | 77° | — | — |
| 1990 | 92° | 66° | 79° | — | — |
| 1989 | 88° | 66° | 77° | — | — |
| 1988 | 81° | 62° | 71° | — | — |
| 1987 | 89° | 63° | 76° | — | — |
| 1986 | 84° | 59° | 72° | — | — |
| 1985 | 82° | 62° | 72° | — | — |
| 1984 | 89° | 64° | 77° | — | — |
| 1983 | 90° | 65° | 77° | — | — |
| 1982 | 91° | 63° | 77° | — | — |
| 1981 | 89° | 64° | 77° | — | — |
| 1980 | 94° | 65° | 79° | — | — |
| 1979 | 86° | 62° | 74° | — | — |
| 1978 | 92° | 66° | 79° | — | — |
| 1977 | 85° | 58° | 71° | — | — |
| 1976 | 91° | 53° | 72° | — | — |
| 1975 | 85° | 61° | 73° | — | — |
| 1974 | 83° | 62° | 72° | — | — |
| 1973 | 86° | 60° | 73° | — | — |
| 1972 | 87° | 65° | 76° | — | — |
| 1971 | 92° | 69° | 80° | — | — |
55 years of data from ESCONDIDO #2