Weather on August 3
San Marcos, CA
55 Years of Data
Avg High
87°F
Avg Low
64°F
Warmest
2018
85°F avg
Coldest
2010
67°F avg
About This Date
August 3rd in San Marcos, CA typically brings warm summer weather, with average highs around 87°F and lows near 64°F. Over 55 years of records, the warmest August 3rd was in 2018 (85°F average), while the coldest was 2010 (67°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 3rd dates historically. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for August 3rd 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 | 90° | 61° | 75° | — | — |
| 2024 | 97° | 68° | 82° | — | — |
| 2023 | 91° | 64° | 78° | — | — |
| 2022 | 90° | 68° | 79° | — | — |
| 2021 | 92° | 65° | 78° | — | — |
| 2020 | 91° | 65° | 78° | — | — |
| 2019 | 91° | 65° | 78° | — | — |
| 2018warmest | 99° | 71° | 85° | — | — |
| 2017 | 95° | 74° | 84° | — | — |
| 2016 | 89° | 68° | 79° | — | — |
| 2015 | 93° | 67° | 80° | — | — |
| 2014 | 88° | 71° | 79° | 0.1" | — |
| 2013 | 79° | 61° | 70° | — | — |
| 2012 | 80° | 63° | 71° | — | — |
| 2011 | 91° | 64° | 78° | — | — |
| 2010coldest | 71° | 62° | 67° | — | — |
| 2009 | 81° | 66° | 73° | — | — |
| 2008 | 77° | 65° | 71° | — | — |
| 2007 | 76° | 68° | 72° | — | — |
| 2006 | 71° | 67° | 69° | 0.1" | — |
| 2005 | 73° | 65° | 69° | — | — |
| 2004 | 84° | 62° | 73° | — | — |
| 2003 | 84° | 67° | 75° | — | — |
| 2002 | 82° | 64° | 73° | — | — |
| 2001 | 83° | 62° | 72° | — | — |
| 2000 | 93° | 65° | 79° | — | — |
| 1999 | 96° | 61° | 78° | — | — |
| 1998 | 99° | 63° | 81° | — | — |
| 1997 | 97° | 69° | 83° | — | — |
| 1996 | 86° | 61° | 73° | — | — |
| 1995 | 98° | 62° | 80° | — | — |
| 1994 | 95° | 58° | 76° | — | — |
| 1993 | 90° | 66° | 78° | — | — |
| 1992 | 92° | 67° | 79° | — | — |
| 1991 | 77° | 61° | 69° | — | — |
| 1990 | 80° | 64° | 72° | — | — |
| 1989 | 86° | 62° | 74° | — | — |
| 1988 | 83° | 66° | 74° | — | — |
| 1987 | 91° | 66° | 79° | — | — |
| 1986 | 92° | 66° | 79° | — | — |
| 1985 | 88° | 61° | 74° | — | — |
| 1984 | 87° | 65° | 76° | — | — |
| 1983 | 85° | 63° | 74° | — | — |
| 1982 | 85° | 62° | 73° | — | — |
| 1981 | 91° | 59° | 75° | — | — |
| 1980 | 89° | 66° | 78° | — | — |
| 1979 | 80° | 58° | 69° | — | — |
| 1978 | 84° | 63° | 73° | — | — |
| 1977 | 96° | 63° | 79° | — | — |
| 1976 | 79° | 61° | 70° | — | — |
| 1975 | 90° | 58° | 74° | — | — |
| 1974 | 86° | 64° | 75° | — | — |
| 1973 | 89° | 62° | 76° | — | — |
| 1972 | 83° | 61° | 72° | — | — |
| 1971 | 96° | 67° | 81° | — | — |
55 years of data from ESCONDIDO #2