Weather on July 17
San Marcos, CA
55 Years of Data
Avg High
86°F
Avg Low
63°F
Warmest
1998
86°F avg
Coldest
1987
66°F avg
About This Date
July 17th in San Marcos, CA typically brings warm summer weather, with average highs around 86°F and lows near 63°F. Over 55 years of records, the warmest July 17th was in 1998 (86°F average), while the coldest was 1987 (66°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 17th dates historically. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for July 17th 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 | 87° | 63° | 75° | — | — |
| 2024 | 87° | 67° | 77° | — | — |
| 2023 | 101° | 68° | 84° | — | — |
| 2022 | 90° | 67° | 78° | — | — |
| 2021 | 90° | 65° | 77° | — | — |
| 2020 | 87° | 64° | 76° | — | — |
| 2019 | 87° | 62° | 75° | — | — |
| 2018 | 88° | 70° | 79° | — | — |
| 2017 | 89° | 67° | 78° | — | — |
| 2016 | 88° | 65° | 76° | — | — |
| 2015 | 88° | 58° | 73° | — | — |
| 2014 | 83° | 66° | 74° | — | — |
| 2013 | 90° | 58° | 74° | — | — |
| 2012 | 81° | 61° | 71° | — | — |
| 2011 | 80° | 62° | 71° | — | — |
| 2010 | 76° | 66° | 71° | — | — |
| 2009 | 79° | 66° | 72° | — | — |
| 2008 | 72° | 64° | 68° | — | — |
| 2007 | 71° | 64° | 68° | — | — |
| 2006 | 83° | 70° | 76° | — | — |
| 2005 | 74° | 63° | 68° | — | — |
| 2004 | 96° | 64° | 80° | — | — |
| 2003 | 90° | 67° | 78° | — | — |
| 2002 | 86° | 62° | 74° | — | — |
| 2001 | 82° | 58° | 70° | — | — |
| 2000 | 85° | 59° | 72° | — | — |
| 1999 | 74° | 66° | 70° | — | — |
| 1998warmest | 105° | 67° | 86° | — | — |
| 1997 | 87° | 64° | 76° | — | — |
| 1996 | 82° | 65° | 73° | — | — |
| 1995 | 93° | 62° | 78° | — | — |
| 1994 | 84° | 65° | 74° | — | — |
| 1993 | 84° | 57° | 71° | — | — |
| 1992 | 96° | 64° | 80° | — | — |
| 1991 | 78° | 61° | 69° | — | — |
| 1990 | 87° | 66° | 77° | — | — |
| 1989 | 85° | 59° | 72° | — | — |
| 1988 | 91° | 64° | 78° | — | — |
| 1987coldest | 73° | 59° | 66° | 0.13" | — |
| 1986 | 84° | 60° | 72° | — | — |
| 1985 | 91° | 65° | 78° | — | — |
| 1984 | 95° | 68° | 82° | — | — |
| 1983 | 83° | 55° | 69° | — | — |
| 1982 | 83° | 60° | 71° | — | — |
| 1981 | 90° | 62° | 76° | — | — |
| 1980 | 90° | 59° | 74° | — | — |
| 1979 | 97° | 64° | 80° | — | — |
| 1978 | 88° | 61° | 74° | — | — |
| 1977 | 90° | 65° | 77° | — | — |
| 1976 | 86° | 63° | 74° | — | — |
| 1975 | 81° | 60° | 70° | — | — |
| 1974 | 93° | 60° | 77° | — | — |
| 1973 | 82° | 62° | 72° | — | — |
| 1972 | 85° | 62° | 73° | — | — |
| 1971 | 90° | 60° | 75° | — | — |
55 years of data from ESCONDIDO #2