Weather on November 18
San Marcos, CA
55 Years of Data
Avg High
72°F
Avg Low
47°F
Warmest
2005
73°F avg
Coldest
1971
47°F avg
About This Date
November 18th in San Marcos, CA typically brings pleasant fall weather, with average highs around 72°F and lows near 47°F — a 25°F daily swing. Over 55 years of records, the warmest November 18th was in 2005 (73°F average), while the coldest was 1971 (47°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 15% of November 18th dates historically, with the wettest November 18th recording 3.63" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for November 18th in San Marcos, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 46° | 54° | — | — |
| 2024 | 69° | 41° | 55° | — | — |
| 2023 | 68° | 60° | 64° | 0.18" | — |
| 2022 | 74° | 42° | 58° | — | — |
| 2021 | 70° | 50° | 60° | — | — |
| 2020 | 72° | 52° | 62° | — | — |
| 2019 | 92° | 53° | 72° | — | — |
| 2018 | 76° | 48° | 62° | — | — |
| 2017 | 80° | 50° | 65° | — | — |
| 2016 | 81° | 46° | 63° | — | — |
| 2015 | 79° | 42° | 60° | — | — |
| 2014 | 79° | 44° | 61° | — | — |
| 2013 | 68° | 47° | 57° | — | — |
| 2012 | 70° | 58° | 64° | — | — |
| 2011 | 60° | 50° | 55° | — | — |
| 2010 | 73° | 47° | 60° | — | — |
| 2009 | 65° | 47° | 56° | — | — |
| 2008 | 80° | 56° | 68° | — | — |
| 2007 | 74° | 50° | 62° | — | — |
| 2006 | 86° | 50° | 68° | — | — |
| 2005warmest | 88° | 58° | 73° | — | — |
| 2004 | 76° | 47° | 61° | — | — |
| 2003 | 79° | 44° | 61° | — | — |
| 2002 | 84° | 43° | 63° | — | — |
| 2001 | 74° | 49° | 61° | — | — |
| 2000 | 72° | 36° | 54° | — | — |
| 1999 | 69° | 44° | 57° | — | — |
| 1998 | 68° | 46° | 57° | — | — |
| 1997 | 75° | 43° | 59° | — | — |
| 1996 | 72° | 46° | 59° | — | — |
| 1995 | 81° | 47° | 64° | — | — |
| 1994 | 62° | 45° | 53° | — | — |
| 1993 | 71° | 41° | 56° | — | — |
| 1992 | 69° | 50° | 60° | — | — |
| 1991 | 66° | 51° | 59° | — | — |
| 1990 | 73° | 55° | 64° | — | — |
| 1989 | 84° | 51° | 68° | — | — |
| 1988 | 66° | 40° | 53° | — | — |
| 1987 | 76° | 52° | 64° | 0.18" | — |
| 1986 | 70° | 51° | 60° | 3.63" | — |
| 1985 | 62° | 44° | 53° | — | — |
| 1984 | 64° | 47° | 55° | — | — |
| 1983 | 68° | 55° | 62° | 0.36" | — |
| 1982 | 66° | 45° | 55° | — | — |
| 1981 | 74° | 47° | 60° | 0.03" | — |
| 1980 | 75° | 42° | 59° | — | — |
| 1979 | 80° | 52° | 66° | 0.03" | — |
| 1978 | 71° | 38° | 54° | — | — |
| 1977 | 62° | 53° | 58° | — | — |
| 1976 | 83° | 47° | 65° | — | — |
| 1975 | 60° | 41° | 51° | — | — |
| 1974 | 68° | 44° | 56° | — | — |
| 1973 | 59° | 49° | 54° | 2.08" | — |
| 1972 | 69° | 39° | 54° | 0.05" | — |
| 1971coldest | 56° | 38° | 47° | — | — |
55 years of data from ESCONDIDO #2