Weather on July 4
San Marcos, CA
55 Years of Data
About This Date
July 4th in San Marcos, CA typically brings warm summer weather, with average highs around 85°F and lows near 61°F. Over 55 years of records, the warmest July 4th was in 1981 (81°F average), while the coldest was 2010 (65°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 4th dates historically. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for July 4th in San Marcos, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 63° | 76° | — | — |
| 2024 | 91° | 65° | 78° | — | — |
| 2023 | 89° | 60° | 75° | — | — |
| 2022 | 83° | 62° | 72° | — | — |
| 2021 | 87° | 64° | 76° | — | — |
| 2020 | 88° | 64° | 76° | — | — |
| 2019 | 83° | 61° | 72° | — | — |
| 2018 | 91° | 63° | 77° | — | — |
| 2017 | 92° | 62° | 77° | — | — |
| 2016 | 84° | 62° | 73° | — | — |
| 2015 | 82° | 66° | 74° | — | — |
| 2014 | 93° | 66° | 80° | — | — |
| 2013 | 89° | 63° | 76° | — | — |
| 2012 | 71° | 62° | 67° | — | — |
| 2011 | 89° | 66° | 78° | — | — |
| 2010coldest | 68° | 62° | 65° | — | — |
| 2009 | 72° | 63° | 67° | — | — |
| 2008 | 75° | 63° | 69° | — | — |
| 2007 | 94° | 62° | 78° | — | — |
| 2006 | 82° | 69° | 76° | — | — |
| 2005 | 84° | 57° | 71° | — | — |
| 2004 | 83° | 59° | 71° | — | — |
| 2003 | 79° | 61° | 70° | 0.03" | — |
| 2002 | 85° | 61° | 73° | — | — |
| 2001 | 91° | 68° | 80° | — | — |
| 2000 | 83° | 60° | 71° | — | — |
| 1999 | 82° | 62° | 72° | — | — |
| 1998 | 80° | 58° | 69° | — | — |
| 1997 | 94° | 61° | 77° | — | — |
| 1996 | 95° | 65° | 80° | — | — |
| 1995 | 79° | 61° | 70° | — | — |
| 1994 | 84° | 64° | 74° | — | — |
| 1993 | 80° | 63° | 71° | — | — |
| 1992 | 84° | 60° | 72° | — | — |
| 1991 | 80° | 60° | 70° | — | — |
| 1990 | 85° | 60° | 72° | — | — |
| 1989 | 100° | 61° | 80° | — | — |
| 1988 | 82° | 60° | 71° | — | — |
| 1987 | 81° | 56° | 68° | — | — |
| 1986 | 84° | 63° | 73° | — | — |
| 1985 | 89° | 66° | 78° | — | — |
| 1984 | 90° | 64° | 77° | — | — |
| 1983 | 89° | 53° | 71° | — | — |
| 1982 | 84° | 57° | 71° | — | — |
| 1981warmest | 99° | 63° | 81° | — | — |
| 1980 | 87° | 62° | 75° | — | — |
| 1979 | 81° | 54° | 67° | — | — |
| 1978 | 85° | 55° | 70° | — | — |
| 1977 | 87° | 60° | 74° | — | — |
| 1976 | 84° | 60° | 72° | — | — |
| 1975 | 82° | 53° | 68° | — | — |
| 1974 | 88° | 59° | 73° | — | — |
| 1973 | 90° | 61° | 75° | — | — |
| 1972 | 88° | 56° | 72° | — | — |
| 1971 | 84° | 56° | 70° | — | — |
San Marcos, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Marcos, CA Monthly Precipitation
Average rainfall per month, in inches.
San Marcos, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Marcos, CA
Most pleasant months in San Marcos, CA: June.