Weather on March 20
San Mateo, CA
55 Years of Data
Avg High
63°F
Avg Low
48°F
Warmest
2026
73°F avg
Coldest
1976
45°F avg
About This Date
March 20th in San Mateo, CA typically brings mild spring weather, with average highs around 63°F and lows near 48°F. Over 56 years of records, the warmest March 20th was in 2026 (73°F average), while the coldest was 1976 (45°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 32% of March 20th dates historically, with the wettest March 20th recording 2.57" 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 March 20th in San Mateo, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 58° | 73° | — | — |
| 2025 | 60° | 46° | 53° | — | — |
| 2024 | 64° | 49° | 56° | — | — |
| 2023 | 57° | 49° | 53° | 0.15" | — |
| 2022 | 61° | 47° | 54° | — | — |
| 2021 | 58° | 48° | 53° | 0.08" | — |
| 2020 | 63° | 44° | 53° | — | — |
| 2019 | 62° | 49° | 55° | 1.42" | — |
| 2018 | 58° | 53° | 55° | 1.07" | — |
| 2017 | 62° | 55° | 59° | 1.32" | — |
| 2016 | 66° | 54° | 60° | 0.28" | — |
| 2015 | 71° | 52° | 61° | — | — |
| 2014 | 69° | 51° | 60° | — | — |
| 2013 | 62° | 50° | 56° | 0.03" | — |
| 2012 | 62° | 50° | 56° | — | — |
| 2011 | 57° | 47° | 52° | 0.18" | — |
| 2010 | 63° | 50° | 56° | — | — |
| 2009 | 58° | 50° | 54° | — | — |
| 2008 | 58° | 46° | 52° | — | — |
| 2007 | 57° | 52° | 54° | 0.33" | — |
| 2006 | 52° | 44° | 48° | 1.02" | — |
| 2005 | 62° | 55° | 59° | 0.38" | — |
| 2004 | 78° | 47° | 62° | — | — |
| 2003 | 60° | 51° | 56° | — | — |
| 2002 | 69° | 46° | 58° | — | — |
| 2001 | 74° | 55° | 64° | — | — |
| 2000 | 64° | 47° | 55° | — | — |
| 1999 | 57° | 45° | 51° | — | — |
| 1998 | 61° | 54° | 57° | — | — |
| 1997 | 67° | 50° | 58° | — | — |
| 1996 | 65° | 47° | 56° | — | — |
| 1995 | 57° | 49° | 53° | 2.57" | — |
| 1994 | 60° | 45° | 52° | — | — |
| 1993 | 65° | 49° | 57° | — | — |
| 1992 | 67° | 55° | 61° | 0.36" | — |
| 1991 | 53° | 47° | 50° | 0.81" | — |
| 1990 | 71° | 47° | 59° | — | — |
| 1989 | 72° | 47° | 59° | — | — |
| 1988 | 67° | 45° | 56° | — | — |
| 1987 | 57° | 39° | 48° | — | — |
| 1986 | 69° | 47° | 58° | — | — |
| 1985 | 62° | 43° | 52° | — | — |
| 1984 | 69° | 52° | 60° | — | — |
| 1983 | 54° | 44° | 49° | 1.27" | — |
| 1982 | 59° | 38° | 48° | — | — |
| 1981 | 55° | 41° | 48° | 1.78" | — |
| 1980 | 60° | 46° | 53° | 0.05" | — |
| 1979 | 61° | 48° | 54° | — | — |
| 1978 | 71° | 53° | 62° | — | — |
| 1977 | 59° | 42° | 51° | — | — |
| 1976coldest | 58° | 32° | 45° | — | — |
| 1975 | 58° | 43° | 50° | — | — |
| 1974 | 72° | 43° | 57° | — | — |
| 1973 | 59° | 44° | 52° | 1.07" | — |
| 1972 | 65° | 45° | 55° | — | — |
| 1971 | 72° | 41° | 56° | — | — |
56 years of data from BURLINGAME