Weather on May 23
San Mateo, CA
55 Years of Data
Avg High
68°F
Avg Low
52°F
Warmest
2000
75°F avg
Coldest
1980
53°F avg
About This Date
May 23rd 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 23rd was in 2000 (75°F average), while the coldest was 1980 (53°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 23rd dates historically, with the wettest May 23rd recording 0.53" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for May 23rd in San Mateo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 52° | 56° | — | — |
| 2024 | 66° | 52° | 59° | — | — |
| 2023 | 67° | 54° | 60° | — | — |
| 2022 | 69° | 52° | 60° | — | — |
| 2021 | 65° | 53° | 59° | — | — |
| 2020 | 74° | 50° | 62° | — | — |
| 2019 | 71° | 52° | 61° | — | — |
| 2018 | 63° | 55° | 59° | — | — |
| 2017 | 69° | 52° | 60° | — | — |
| 2016 | 66° | 54° | 60° | — | — |
| 2015 | 63° | 54° | 58° | — | — |
| 2014 | 69° | 54° | 61° | — | — |
| 2013 | 62° | 48° | 55° | — | — |
| 2012 | 64° | 52° | 58° | — | — |
| 2011 | 64° | 50° | 57° | — | — |
| 2010 | 63° | 47° | 55° | — | — |
| 2009 | 56° | 50° | 53° | — | — |
| 2008 | 67° | 47° | 57° | — | — |
| 2007 | 82° | 54° | 68° | — | — |
| 2006 | 73° | 59° | 66° | — | — |
| 2005 | 70° | 52° | 61° | — | — |
| 2004 | 65° | 54° | 59° | — | — |
| 2003 | 67° | 52° | 59° | — | — |
| 2002 | 75° | 49° | 62° | — | — |
| 2001 | 69° | 51° | 60° | — | — |
| 2000warmest | 88° | 62° | 75° | — | — |
| 1999 | 68° | 53° | 61° | — | — |
| 1998 | 65° | 55° | 60° | — | — |
| 1997 | 71° | 59° | 65° | 0.53" | — |
| 1996 | 67° | 48° | 57° | — | — |
| 1995 | 67° | 50° | 58° | — | — |
| 1994 | 71° | 51° | 61° | — | — |
| 1993 | 69° | 56° | 62° | — | — |
| 1992 | 73° | 52° | 62° | — | — |
| 1991 | 71° | 47° | 59° | — | — |
| 1990 | 62° | 52° | 57° | 0.2" | — |
| 1989 | 66° | 51° | 59° | 0.1" | — |
| 1988 | 64° | 51° | 58° | — | — |
| 1987 | 63° | 50° | 56° | — | — |
| 1986 | 62° | 50° | 56° | — | — |
| 1985 | 69° | 54° | 61° | — | — |
| 1984 | 69° | 52° | 60° | — | — |
| 1983 | 63° | 52° | 57° | — | — |
| 1982 | 88° | 49° | 68° | — | — |
| 1981 | 69° | 52° | 60° | — | — |
| 1980coldest | 60° | 47° | 53° | — | — |
| 1979 | 69° | 53° | 61° | — | — |
| 1978 | 69° | 50° | 60° | — | — |
| 1977 | 66° | 51° | 59° | — | — |
| 1976 | 68° | 50° | 59° | — | — |
| 1975 | 70° | 52° | 61° | — | — |
| 1974 | — | 47° | — | — | — |
| 1973 | 65° | 52° | 58° | — | — |
| 1972 | 65° | 50° | 57° | — | — |
| 1971 | 75° | 48° | 62° | — | — |
55 years of data from BURLINGAME