Weather on October 15
San Mateo, CA
55 Years of Data
Avg High
72°F
Avg Low
53°F
Warmest
2020
77°F avg
Coldest
1971
56°F avg
About This Date
October 15th in San Mateo, CA typically brings pleasant fall weather, with average highs around 72°F and lows near 53°F. Over 55 years of records, the warmest October 15th was in 2020 (77°F average), while the coldest was 1971 (56°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 7% of October 15th dates historically, with the wettest October 15th recording 2.54" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for October 15th in San Mateo, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 55° | 59° | — | — |
| 2024 | 72° | 54° | 63° | — | — |
| 2023 | 77° | 57° | 67° | — | — |
| 2022 | 68° | 54° | 61° | — | — |
| 2021 | 79° | 51° | 65° | — | — |
| 2020warmest | 91° | 62° | 77° | — | — |
| 2019 | 65° | 49° | 57° | — | — |
| 2018 | 81° | 55° | 68° | — | — |
| 2017 | 81° | 52° | 66° | — | — |
| 2016 | 72° | 56° | 64° | 1.02" | — |
| 2015 | 71° | 61° | 66° | — | — |
| 2014 | 76° | 62° | 69° | — | — |
| 2013 | 80° | 53° | 67° | — | — |
| 2012 | 72° | 55° | 63° | — | — |
| 2011 | 72° | 60° | 66° | — | — |
| 2010 | 76° | 59° | 67° | — | — |
| 2009 | 72° | 64° | 68° | — | — |
| 2008 | 82° | 53° | 68° | — | — |
| 2007 | 65° | 52° | 58° | — | — |
| 2006 | 58° | 55° | 56° | — | — |
| 2005 | 66° | 54° | 60° | 0.08" | — |
| 2004 | 67° | 53° | 60° | — | — |
| 2003 | 63° | 51° | 57° | — | — |
| 2002 | 63° | 51° | 57° | — | — |
| 2001 | 80° | 56° | 68° | — | — |
| 2000 | 65° | 54° | 59° | — | — |
| 1999 | 82° | 53° | 68° | — | — |
| 1998 | 66° | 50° | 58° | — | — |
| 1997 | 84° | 55° | 70° | — | — |
| 1996 | 68° | 51° | 60° | — | — |
| 1995 | 68° | 55° | 62° | — | — |
| 1994 | 64° | 51° | 58° | — | — |
| 1993 | 68° | 58° | 63° | 1.02" | — |
| 1992 | 69° | 53° | 61° | — | — |
| 1991 | 69° | 52° | 60° | — | — |
| 1990 | 68° | 54° | 61° | — | — |
| 1989 | 63° | 50° | 56° | — | — |
| 1988 | 79° | 51° | 65° | — | — |
| 1987 | 70° | 53° | 61° | — | — |
| 1986 | 69° | 48° | 59° | — | — |
| 1985 | 82° | 50° | 66° | — | — |
| 1984 | 67° | 52° | 59° | — | — |
| 1983 | 70° | 54° | 62° | — | — |
| 1982 | 63° | 52° | 57° | — | — |
| 1981 | 70° | 48° | 59° | — | — |
| 1980 | 65° | 50° | 57° | — | — |
| 1979 | 73° | 61° | 67° | — | — |
| 1978 | 93° | 54° | 73° | — | — |
| 1977 | 73° | 46° | 60° | — | — |
| 1976 | 79° | 44° | 61° | — | — |
| 1975 | 72° | 45° | 58° | — | — |
| 1974 | 87° | 48° | 68° | — | — |
| 1973 | 73° | 48° | 61° | — | — |
| 1972 | 68° | 56° | 62° | 2.54" | — |
| 1971coldest | 62° | 50° | 56° | — | — |
55 years of data from BURLINGAME