Weather on May 15
San Mateo, CA
55 Years of Data
Avg High
68°F
Avg Low
52°F
Warmest
2008
80°F avg
Coldest
1999
53°F avg
About This Date
May 15th in San Mateo, CA typically brings mild spring weather, with average highs around 68°F and lows near 52°F. Over 55 years of records, the warmest May 15th was in 2008 (80°F average), while the coldest was 1999 (53°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 15th dates historically, with the wettest May 15th recording 2.62" 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 May 15th in San Mateo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 51° | 60° | — | — |
| 2024 | 68° | 53° | 61° | — | — |
| 2023 | 68° | 55° | 62° | — | — |
| 2022 | 64° | 52° | 58° | — | — |
| 2021 | 64° | 52° | 58° | — | — |
| 2020 | 67° | 55° | 61° | — | — |
| 2019 | 65° | 53° | 59° | 1.19" | — |
| 2018 | 67° | 56° | 61° | — | — |
| 2017 | 63° | 50° | 56° | — | — |
| 2016 | 66° | 56° | 61° | — | — |
| 2015 | 62° | 53° | 58° | — | — |
| 2014 | 84° | 58° | 71° | — | — |
| 2013 | 62° | 52° | 57° | — | — |
| 2012 | 61° | 51° | 56° | — | — |
| 2011 | 60° | 46° | 53° | 0.2" | — |
| 2010 | 64° | 50° | 57° | — | — |
| 2009 | 64° | 52° | 58° | — | — |
| 2008warmest | 96° | 64° | 80° | — | — |
| 2007 | 56° | 50° | 53° | — | — |
| 2006 | 80° | 58° | 69° | — | — |
| 2005 | 72° | 59° | 65° | — | — |
| 2004 | 64° | 52° | 58° | — | — |
| 2003 | 61° | 50° | 55° | — | — |
| 2002 | 61° | 52° | 56° | — | — |
| 2001 | 71° | 55° | 63° | — | — |
| 2000 | 65° | 54° | 59° | 0.3" | — |
| 1999coldest | 61° | 45° | 53° | — | — |
| 1998 | 64° | 51° | 58° | — | — |
| 1997 | 82° | 58° | 70° | — | — |
| 1996 | 65° | 60° | 62° | 2.62" | — |
| 1995 | 65° | 49° | 57° | — | — |
| 1994 | 64° | 53° | 59° | 0.03" | — |
| 1993 | 69° | 52° | 60° | — | — |
| 1992 | 65° | 54° | 59° | — | — |
| 1991 | 69° | 48° | 59° | — | — |
| 1990 | 67° | 50° | 58° | — | — |
| 1989 | 70° | 52° | 61° | — | — |
| 1988 | 67° | 51° | 59° | — | — |
| 1987 | 69° | 55° | 62° | — | — |
| 1986 | 64° | 50° | 57° | — | — |
| 1985 | 83° | 48° | 65° | — | — |
| 1984 | 65° | 47° | 56° | — | — |
| 1983 | 62° | 50° | 56° | — | — |
| 1982 | 64° | 46° | 55° | — | — |
| 1981 | 63° | 50° | 56° | — | — |
| 1980 | 63° | 48° | 55° | — | — |
| 1979 | 60° | 50° | 55° | — | — |
| 1978 | 65° | 55° | 60° | 0.05" | — |
| 1977 | 61° | 49° | 55° | — | — |
| 1976 | 83° | 44° | 63° | — | — |
| 1975 | 76° | 51° | 63° | — | — |
| 1974 | — | 46° | — | — | — |
| 1973 | 83° | 50° | 66° | — | — |
| 1972 | 71° | 49° | 60° | — | — |
| 1971 | 65° | 51° | 58° | — | — |
55 years of data from BURLINGAME