Weather on May 20
San Francisco, CA
55 Years of Data
Avg High
64°F
Avg Low
52°F
Warmest
1988
73°F avg
Coldest
1974
52°F avg
About This Date
May 20th in San Francisco, CA typically brings mild spring weather, with average highs around 64°F and lows near 52°F. Over 55 years of records, the warmest May 20th was in 1988 (73°F average), while the coldest was 1974 (52°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 20th dates historically, with the wettest May 20th recording 0.64" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 51° | 58° | — | — |
| 2024 | 65° | 50° | 57° | — | — |
| 2023 | 59° | 51° | 55° | 0.05" | — |
| 2022 | 69° | 50° | 60° | — | — |
| 2021 | 60° | 48° | 54° | — | — |
| 2020 | 65° | 53° | 59° | — | — |
| 2019 | 61° | 51° | 56° | 0.03" | — |
| 2018 | 59° | 52° | 55° | — | — |
| 2017 | 77° | 51° | 64° | — | — |
| 2016 | 58° | 50° | 54° | — | — |
| 2015 | 59° | 53° | 56° | 0.08" | — |
| 2014 | 64° | 53° | 59° | — | — |
| 2013 | 79° | 52° | 65° | — | — |
| 2012 | 68° | 51° | 60° | — | — |
| 2011 | 59° | 51° | 55° | — | — |
| 2010 | 63° | 49° | 56° | — | — |
| 2009 | 61° | 49° | 55° | — | — |
| 2008 | 60° | 51° | 56° | — | — |
| 2007 | 63° | 50° | 56° | — | — |
| 2006 | 67° | 52° | 59° | — | — |
| 2005 | 65° | 54° | 59° | — | — |
| 2004 | 61° | 51° | 56° | — | — |
| 2003 | 75° | 53° | 64° | — | — |
| 2002 | 60° | 48° | 54° | 0.64" | — |
| 2001 | 69° | 52° | 60° | — | — |
| 2000 | 71° | 53° | 62° | — | — |
| 1999 | 58° | 48° | 53° | — | — |
| 1998 | 61° | 50° | 55° | — | — |
| 1997 | 65° | 55° | 60° | — | — |
| 1996 | 67° | 53° | 60° | — | — |
| 1995 | 60° | 52° | 56° | — | — |
| 1994 | 65° | 52° | 58° | — | — |
| 1993 | 70° | 60° | 65° | — | — |
| 1992 | 72° | 57° | 64° | — | — |
| 1991 | 60° | 49° | 54° | — | — |
| 1990 | 64° | 55° | 60° | 0.56" | — |
| 1989 | 61° | 51° | 56° | — | — |
| 1988warmest | 92° | 55° | 73° | — | — |
| 1987 | 63° | 52° | 57° | — | — |
| 1986 | 64° | 52° | 58° | — | — |
| 1985 | 64° | 52° | 58° | — | — |
| 1984 | 65° | 51° | 58° | — | — |
| 1983 | 78° | 56° | 67° | — | — |
| 1982 | 60° | 48° | 54° | — | — |
| 1981 | 62° | 50° | 56° | — | — |
| 1980 | 60° | 53° | 57° | — | — |
| 1979 | 64° | 56° | 60° | — | — |
| 1978 | 58° | 51° | 54° | — | — |
| 1977 | 60° | 50° | 55° | — | — |
| 1976 | 64° | 50° | 57° | — | — |
| 1975 | 69° | 49° | 59° | — | — |
| 1974coldest | 56° | 49° | 52° | — | — |
| 1973 | 58° | 51° | 54° | — | — |
| 1972 | 62° | 53° | 58° | — | — |
| 1971 | 61° | 48° | 54° | — | — |
55 years of data from SAN FRANCISCO DWTN