Weather on August 4
San Marcos, CA
55 Years of Data
Avg High
87°F
Avg Low
63°F
Warmest
2018
84°F avg
Coldest
2010
66°F avg
About This Date
August 4th in San Marcos, CA typically brings warm summer weather, with average highs around 87°F and lows near 63°F. Over 55 years of records, the warmest August 4th was in 2018 (84°F average), while the coldest was 2010 (66°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 4th dates historically. The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
Planning for August 4th in San Marcos, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 62° | 76° | — | — |
| 2024 | 98° | 68° | 83° | — | — |
| 2023 | 88° | 62° | 75° | — | — |
| 2022 | 91° | 67° | 79° | — | — |
| 2021 | 90° | 65° | 77° | — | — |
| 2020 | 91° | 65° | 78° | — | — |
| 2019 | 92° | 65° | 78° | — | — |
| 2018warmest | 99° | 69° | 84° | — | — |
| 2017 | 92° | 70° | 81° | — | — |
| 2016 | 87° | 69° | 78° | — | — |
| 2015 | 93° | 65° | 79° | — | — |
| 2014 | 92° | 70° | 81° | 0.03" | — |
| 2013 | 84° | 61° | 72° | — | — |
| 2012 | 81° | 63° | 72° | — | — |
| 2011 | 91° | 60° | 76° | — | — |
| 2010coldest | 70° | 63° | 66° | — | — |
| 2009 | 81° | 68° | 74° | — | — |
| 2008 | 79° | 69° | 74° | — | — |
| 2007 | 74° | 67° | 70° | — | — |
| 2006 | 74° | 65° | 69° | — | — |
| 2005 | 74° | 63° | 68° | — | — |
| 2004 | 69° | 64° | 67° | — | — |
| 2003 | 87° | 60° | 74° | — | — |
| 2002 | 85° | 59° | 72° | — | — |
| 2001 | 86° | 60° | 73° | — | — |
| 2000 | 89° | 64° | 77° | — | — |
| 1999 | 92° | 61° | 76° | — | — |
| 1998 | 73° | 63° | 68° | — | — |
| 1997 | 97° | 67° | 82° | — | — |
| 1996 | 83° | 64° | 73° | — | — |
| 1995 | 93° | 61° | 77° | — | — |
| 1994 | 84° | 58° | 71° | — | — |
| 1993 | 89° | 65° | 77° | — | — |
| 1992 | 89° | 67° | 78° | — | — |
| 1991 | 78° | 61° | 69° | — | — |
| 1990 | 83° | 64° | 73° | — | — |
| 1989 | 89° | 61° | 75° | — | — |
| 1988 | 83° | 66° | 74° | — | — |
| 1987 | 91° | 63° | 77° | — | — |
| 1986 | 92° | 65° | 78° | — | — |
| 1985 | 89° | 55° | 72° | — | — |
| 1984 | 88° | 63° | 75° | — | — |
| 1983 | 85° | 60° | 72° | — | — |
| 1982 | 88° | 56° | 72° | — | — |
| 1981 | 90° | 60° | 75° | — | — |
| 1980 | 87° | 63° | 75° | — | — |
| 1979 | 89° | 59° | 74° | — | — |
| 1978 | 94° | 63° | 78° | — | — |
| 1977 | 91° | 62° | 77° | — | — |
| 1976 | 83° | 54° | 68° | — | — |
| 1975 | 90° | 58° | 74° | — | — |
| 1974 | 85° | 66° | 75° | — | — |
| 1973 | 84° | 62° | 73° | — | — |
| 1972 | 87° | 62° | 75° | — | — |
| 1971 | 96° | 66° | 81° | — | — |
55 years of data from ESCONDIDO #2