Weather on February 18
San Marcos, CA
55 Years of Data
Avg High
68°F
Avg Low
44°F
Warmest
1981
66°F avg
Coldest
1975
48°F avg
About This Date
February 18th in San Marcos, CA typically brings mild winter weather, with average highs around 68°F and lows near 44°F. Over 56 years of records, the warmest February 18th was in 1981 (66°F average), while the coldest was 1975 (48°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 27% of February 18th dates historically, with the wettest February 18th recording 4.98" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for February 18th in San Marcos, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 60° | 48° | 54° | 1.98" | — |
| 2025 | 72° | 50° | 61° | — | — |
| 2024 | 72° | 47° | 59° | — | — |
| 2023 | 70° | 39° | 54° | — | — |
| 2022 | 76° | 40° | 58° | — | — |
| 2021 | 69° | 42° | 56° | — | — |
| 2020 | 71° | 51° | 61° | — | — |
| 2019 | 57° | 40° | 48° | 0.13" | — |
| 2018 | 71° | 45° | 58° | — | — |
| 2017 | 61° | 50° | 55° | 4.19" | — |
| 2016 | 68° | 56° | 62° | 0.33" | — |
| 2015 | 75° | 51° | 63° | — | — |
| 2014 | 70° | 49° | 59° | — | — |
| 2013 | 63° | 47° | 55° | — | — |
| 2012 | 65° | 39° | 52° | — | — |
| 2011 | 66° | 46° | 56° | 0.58" | — |
| 2010 | 62° | 48° | 55° | — | — |
| 2009 | 62° | 44° | 53° | — | — |
| 2008 | 66° | 32° | 49° | — | — |
| 2007 | 69° | 54° | 61° | 0.51" | — |
| 2006 | 59° | 45° | 52° | — | — |
| 2005 | 66° | 51° | 59° | 1.55" | — |
| 2004 | 74° | 45° | 59° | 0.91" | — |
| 2003 | 69° | 48° | 59° | — | — |
| 2002 | 60° | 41° | 51° | 0.2" | — |
| 2001 | 71° | 35° | 53° | — | — |
| 2000 | 69° | 40° | 54° | — | — |
| 1999 | 65° | 48° | 56° | — | — |
| 1998 | 65° | 41° | 53° | — | — |
| 1997 | 71° | 44° | 58° | 0.13" | — |
| 1996 | 69° | 55° | 62° | — | — |
| 1995 | 80° | 45° | 62° | — | — |
| 1994 | 59° | 41° | 50° | 0.25" | — |
| 1993 | 69° | 53° | 61° | 0.97" | — |
| 1992 | 66° | 46° | 56° | — | — |
| 1991 | 74° | 42° | 58° | — | — |
| 1990 | 56° | 47° | 51° | 2.03" | — |
| 1989 | 69° | 40° | 54° | — | — |
| 1988 | 69° | 38° | 53° | — | — |
| 1987 | 70° | 38° | 54° | — | — |
| 1986 | 71° | 45° | 58° | — | — |
| 1985 | 64° | 38° | 51° | — | — |
| 1984 | 70° | 35° | 52° | — | — |
| 1983 | 73° | 42° | 58° | — | — |
| 1982 | 78° | 44° | 61° | — | — |
| 1981warmest | 85° | 48° | 66° | — | — |
| 1980 | 71° | 57° | 64° | 4.98" | — |
| 1979 | 68° | 36° | 52° | — | — |
| 1978 | 68° | 35° | 52° | — | — |
| 1977 | 78° | 43° | 60° | — | — |
| 1976 | 72° | 41° | 56° | — | — |
| 1975coldest | 66° | 31° | 48° | — | — |
| 1974 | 62° | 37° | 50° | — | — |
| 1973 | 70° | 38° | 54° | — | — |
| 1972 | 75° | 46° | 61° | — | — |
| 1971 | 62° | 48° | 55° | 0.05" | — |
56 years of data from ESCONDIDO #2