Weather on February 18
San Mateo, CA
55 Years of Data
Avg High
60°F
Avg Low
46°F
Warmest
1986
60°F avg
Coldest
1990
43°F avg
About This Date
February 18th in San Mateo, CA typically brings mild winter weather, with average highs around 60°F and lows near 46°F. Over 56 years of records, the warmest February 18th was in 1986 (60°F average), while the coldest was 1990 (43°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 39% of February 18th dates historically, with the wettest February 18th recording 3.33" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for February 18th in San Mateo, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 54° | 40° | 47° | 0.43" | — |
| 2025 | 59° | 45° | 52° | — | — |
| 2024 | 66° | 47° | 56° | 0.81" | — |
| 2023 | 60° | 40° | 50° | — | — |
| 2022 | 64° | 45° | 54° | — | — |
| 2021 | 65° | 43° | 54° | — | — |
| 2020 | 67° | 49° | 58° | — | — |
| 2019 | 56° | 38° | 47° | — | — |
| 2018 | 58° | 45° | 51° | 0.05" | — |
| 2017 | 57° | 50° | 54° | 0.48" | — |
| 2016 | 61° | 50° | 55° | 0.43" | — |
| 2015 | 64° | 54° | 59° | — | — |
| 2014 | 62° | 48° | 55° | — | — |
| 2013 | 52° | 45° | 48° | — | — |
| 2012 | 57° | 46° | 52° | — | — |
| 2011 | 47° | 39° | 43° | 2.26" | — |
| 2010 | 58° | 50° | 54° | — | — |
| 2009 | 58° | 42° | 50° | — | — |
| 2008 | 54° | 47° | 50° | — | — |
| 2007 | 57° | 49° | 53° | — | — |
| 2006 | 49° | 38° | 43° | 0.66" | — |
| 2005 | 62° | 53° | 58° | 2.67" | — |
| 2004 | 58° | 50° | 54° | 0.99" | — |
| 2003 | 59° | 43° | 51° | — | — |
| 2002 | 55° | 47° | 51° | — | — |
| 2001 | 57° | 50° | 54° | 0.18" | — |
| 2000 | 61° | 46° | 53° | — | — |
| 1999 | 58° | 48° | 53° | 0.61" | — |
| 1998 | 57° | 46° | 52° | 0.05" | — |
| 1997 | 60° | 44° | 52° | — | — |
| 1996 | 63° | 55° | 59° | 1.07" | — |
| 1995 | 65° | 48° | 56° | — | — |
| 1994 | 52° | 43° | 47° | 0.79" | — |
| 1993 | 63° | 53° | 58° | 1.4" | — |
| 1992 | 59° | 48° | 54° | 0.28" | — |
| 1991 | 64° | 47° | 55° | — | — |
| 1990coldest | 51° | 36° | 43° | 0.03" | — |
| 1989 | 57° | 48° | 53° | — | — |
| 1988 | 63° | 43° | 53° | — | — |
| 1987 | 62° | 45° | 53° | — | — |
| 1986warmest | 67° | 54° | 60° | 3.33" | — |
| 1985 | 68° | 41° | 55° | — | — |
| 1984 | 59° | 41° | 50° | — | — |
| 1983 | 59° | 49° | 54° | 1.19" | — |
| 1982 | 62° | 44° | 53° | — | — |
| 1981 | 70° | 49° | 59° | — | — |
| 1980 | 64° | 54° | 59° | 1.42" | — |
| 1979 | 57° | 46° | 52° | 0.66" | — |
| 1978 | 69° | 46° | 58° | — | — |
| 1977 | 64° | 42° | 53° | — | — |
| 1976 | 59° | 44° | 52° | 0.08" | — |
| 1975 | 58° | 36° | 47° | — | — |
| 1974 | 60° | 39° | 50° | — | — |
| 1973 | 64° | 39° | 52° | — | — |
| 1972 | 59° | 47° | 53° | — | — |
| 1971 | 59° | 44° | 52° | — | — |
56 years of data from BURLINGAME