Weather on September 4
San Mateo, CA
55 Years of Data
Avg High
74°F
Avg Low
56°F
Warmest
2004
79°F avg
Coldest
2012
58°F avg
About This Date
September 4th in San Mateo, CA typically brings pleasant fall weather, with average highs around 74°F and lows near 56°F. Over 55 years of records, the warmest September 4th was in 2004 (79°F average), while the coldest was 2012 (58°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 September 4th in San Mateo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 58° | 64° | — | — |
| 2024 | 72° | 55° | 63° | — | — |
| 2023 | 70° | 59° | 64° | — | — |
| 2022 | 89° | 58° | 73° | — | — |
| 2021 | 73° | 54° | 63° | — | — |
| 2020 | 72° | 57° | 64° | — | — |
| 2019 | 74° | 58° | 66° | — | — |
| 2018 | 70° | 56° | 63° | — | — |
| 2017 | 84° | 68° | 76° | — | — |
| 2016 | 67° | 56° | 61° | — | — |
| 2015 | 69° | 56° | 62° | — | — |
| 2014 | 76° | 60° | 68° | — | — |
| 2013 | 74° | 61° | 67° | — | — |
| 2012coldest | 64° | 51° | 58° | — | — |
| 2011 | 66° | 55° | 61° | — | — |
| 2010 | 67° | 56° | 61° | — | — |
| 2009 | 69° | 56° | 62° | — | — |
| 2008 | 92° | 59° | 75° | — | — |
| 2007 | 69° | 58° | 63° | — | — |
| 2006 | 65° | 54° | 59° | — | — |
| 2005 | 68° | 54° | 61° | — | — |
| 2004warmest | 92° | 66° | 79° | — | — |
| 2003 | 73° | 60° | 67° | — | — |
| 2002 | 70° | 56° | 63° | — | — |
| 2001 | 70° | 56° | 63° | — | — |
| 2000 | 68° | 56° | 62° | — | — |
| 1999 | 68° | 51° | 60° | — | — |
| 1998 | 83° | 57° | 70° | — | — |
| 1997 | 83° | 60° | 71° | — | — |
| 1996 | 69° | 54° | 61° | — | — |
| 1995 | 72° | 55° | 63° | — | — |
| 1994 | 82° | 54° | 68° | — | — |
| 1993 | 67° | 57° | 62° | — | — |
| 1992 | 76° | 56° | 66° | — | — |
| 1991 | 72° | 55° | 63° | — | — |
| 1990 | 76° | 59° | 67° | — | — |
| 1989 | 71° | 50° | 61° | — | — |
| 1988 | 77° | 54° | 65° | — | — |
| 1987 | 71° | 55° | 63° | — | — |
| 1986 | 69° | 54° | 61° | — | — |
| 1985 | 72° | 56° | 64° | — | — |
| 1984 | 88° | 54° | 71° | — | — |
| 1983 | 86° | 59° | 73° | — | — |
| 1982 | 79° | 53° | 66° | — | — |
| 1981 | 67° | 53° | 60° | — | — |
| 1980 | 68° | 54° | 61° | — | — |
| 1979 | 72° | 60° | 66° | — | — |
| 1978 | 86° | 63° | 74° | — | — |
| 1977 | 76° | 49° | 62° | — | — |
| 1976 | 69° | 54° | 61° | — | — |
| 1975 | 84° | 51° | 68° | — | — |
| 1974 | 73° | 51° | 62° | — | — |
| 1973 | 71° | 46° | 59° | — | — |
| 1972 | 72° | 54° | 63° | — | — |
| 1971 | 91° | 54° | 72° | — | — |
55 years of data from BURLINGAME