Weather on April 15
San Mateo, CA
55 Years of Data
Avg High
64°F
Avg Low
48°F
Warmest
1999
66°F avg
Coldest
1975
46°F avg
About This Date
April 15th in San Mateo, CA typically brings mild spring weather, with average highs around 64°F and lows near 48°F. Over 55 years of records, the warmest April 15th was in 1999 (66°F average), while the coldest was 1975 (46°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 13% of April 15th dates historically, with the wettest April 15th recording 2.79" 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 April 15th in San Mateo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 51° | 58° | — | — |
| 2024 | 65° | 50° | 57° | — | — |
| 2023 | 59° | 49° | 54° | — | — |
| 2022 | 64° | 47° | 55° | — | — |
| 2021 | 65° | 47° | 56° | — | — |
| 2020 | 73° | 50° | 62° | — | — |
| 2019 | 61° | 49° | 55° | 0.08" | — |
| 2018 | 64° | 50° | 57° | 0.13" | — |
| 2017 | 67° | 46° | 56° | — | — |
| 2016 | 66° | 49° | 57° | — | — |
| 2015 | 69° | 48° | 59° | — | — |
| 2014 | 65° | 52° | 58° | — | — |
| 2013 | 57° | 46° | 52° | — | — |
| 2012 | 64° | 51° | 58° | — | — |
| 2011 | 65° | 49° | 57° | — | — |
| 2010 | 66° | 47° | 56° | — | — |
| 2009 | 57° | 41° | 49° | — | — |
| 2008 | 59° | 45° | 52° | — | — |
| 2007 | 63° | 47° | 55° | — | — |
| 2006 | 58° | 51° | 54° | 0.23" | — |
| 2005 | 66° | 45° | 55° | — | — |
| 2004 | 59° | 49° | 54° | — | — |
| 2003 | 59° | 48° | 54° | — | — |
| 2002 | 59° | 48° | 54° | — | — |
| 2001 | 59° | 42° | 51° | — | — |
| 2000 | 63° | 53° | 58° | — | — |
| 1999warmest | 81° | 52° | 66° | — | — |
| 1998 | 59° | 44° | 52° | — | — |
| 1997 | 78° | 51° | 65° | — | — |
| 1996 | 66° | 55° | 61° | 0.05" | — |
| 1995 | 53° | 42° | 48° | 0.74" | — |
| 1994 | 71° | 51° | 61° | — | — |
| 1993 | 62° | 52° | 57° | — | — |
| 1992 | 65° | 54° | 59° | — | — |
| 1991 | 57° | 48° | 53° | — | — |
| 1990 | 66° | 54° | 60° | — | — |
| 1989 | 62° | 51° | 57° | — | — |
| 1988 | 58° | 50° | 54° | — | — |
| 1987 | 81° | 46° | 63° | — | — |
| 1986 | 57° | 50° | 54° | 0.28" | — |
| 1985 | 64° | 52° | 58° | — | — |
| 1984 | 72° | 50° | 61° | — | — |
| 1983 | 67° | 42° | 54° | — | — |
| 1982 | 57° | 45° | 51° | — | — |
| 1981 | 62° | 44° | 53° | — | — |
| 1980 | 70° | 46° | 58° | — | — |
| 1979 | 66° | 50° | 58° | — | — |
| 1978 | 57° | 49° | 53° | 2.79" | — |
| 1977 | 72° | 40° | 56° | — | — |
| 1976 | 62° | 49° | 55° | — | — |
| 1975coldest | 55° | 37° | 46° | — | — |
| 1974 | 73° | 46° | 60° | — | — |
| 1973 | 60° | 50° | 55° | — | — |
| 1972 | 71° | 42° | 57° | — | — |
| 1971 | 63° | 46° | 54° | — | — |
55 years of data from BURLINGAME