Weather on July 9
San Mateo, CA
55 Years of Data
Avg High
73°F
Avg Low
55°F
Warmest
1985
77°F avg
Coldest
1998
57°F avg
About This Date
July 9th in San Mateo, CA typically brings pleasant summer weather, with average highs around 73°F and lows near 55°F. Over 55 years of records, the warmest July 9th was in 1985 (77°F average), while the coldest was 1998 (57°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 9th dates historically. 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 July 9th in San Mateo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 54° | 60° | — | — |
| 2024 | 72° | 58° | 65° | — | — |
| 2023 | 64° | 55° | 60° | — | — |
| 2022 | 70° | 57° | 63° | — | — |
| 2021 | 75° | 58° | 66° | — | — |
| 2020 | 74° | 53° | 63° | — | — |
| 2019 | 71° | 58° | 64° | — | — |
| 2018 | 90° | 56° | 73° | — | — |
| 2017 | 70° | 53° | 61° | — | — |
| 2016 | 72° | 58° | 65° | — | — |
| 2015 | 68° | 59° | 64° | — | — |
| 2014 | 75° | 59° | 67° | — | — |
| 2013 | 71° | 54° | 62° | — | — |
| 2012 | 65° | 53° | 59° | — | — |
| 2011 | 66° | 52° | 59° | — | — |
| 2010 | 67° | 55° | 61° | — | — |
| 2009 | 67° | 53° | 60° | — | — |
| 2008 | 83° | 62° | 72° | — | — |
| 2007 | 73° | 56° | 64° | — | — |
| 2006 | 68° | 54° | 61° | — | — |
| 2005 | 70° | 59° | 64° | — | — |
| 2004 | 71° | 56° | 63° | — | — |
| 2003 | 75° | 53° | 64° | — | — |
| 2002 | 90° | 58° | 74° | — | — |
| 2001 | 68° | 57° | 63° | — | — |
| 2000 | 71° | 54° | 62° | — | — |
| 1999 | 72° | 51° | 61° | — | — |
| 1998coldest | 62° | 51° | 57° | — | — |
| 1997 | 71° | 55° | 63° | — | — |
| 1996 | 73° | 53° | 63° | — | — |
| 1995 | 70° | 57° | 63° | — | — |
| 1994 | 66° | 52° | 59° | — | — |
| 1993 | 74° | 56° | 65° | — | — |
| 1992 | 87° | 59° | 73° | — | — |
| 1991 | 64° | 53° | 59° | — | — |
| 1990 | 74° | 57° | 65° | — | — |
| 1989 | 73° | 53° | 63° | — | — |
| 1988 | 73° | 51° | 62° | — | — |
| 1987 | 77° | 54° | 65° | — | — |
| 1986 | 69° | 53° | 61° | — | — |
| 1985warmest | 93° | 61° | 77° | — | — |
| 1984 | 71° | 53° | 62° | — | — |
| 1983 | 81° | 49° | 65° | — | — |
| 1982 | 73° | 52° | 62° | — | — |
| 1981 | 70° | 52° | 61° | — | — |
| 1980 | 72° | 54° | 63° | — | — |
| 1979 | 78° | 57° | 68° | — | — |
| 1978 | 85° | 55° | 70° | — | — |
| 1977 | 74° | 47° | 60° | — | — |
| 1976 | 72° | 56° | 64° | — | — |
| 1975 | 68° | 52° | 60° | — | — |
| 1974 | 69° | 59° | 64° | 0.03" | — |
| 1973 | 84° | 51° | 68° | — | — |
| 1972 | 81° | 54° | 67° | — | — |
| 1971 | 70° | 52° | 61° | — | — |
55 years of data from BURLINGAME