Weather on May 18
San Francisco, CA
55 Years of Data
Avg High
64°F
Avg Low
51°F
Warmest
1978
71°F avg
Coldest
1974
50°F avg
About This Date
May 18th in San Francisco, CA typically brings mild spring weather, with average highs around 64°F and lows near 51°F. Over 55 years of records, the warmest May 18th was in 1978 (71°F average), while the coldest was 1974 (50°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 18th dates historically, with the wettest May 18th recording 1.96" 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 May 18th in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 50° | 57° | — | — |
| 2024 | 62° | 53° | 58° | — | — |
| 2023 | 59° | 51° | 55° | — | — |
| 2022 | 77° | 50° | 64° | — | — |
| 2021 | 63° | 50° | 56° | — | — |
| 2020 | 63° | 55° | 59° | 0.3" | — |
| 2019 | 56° | 52° | 54° | 1.96" | — |
| 2018 | 60° | 52° | 56° | — | — |
| 2017 | 71° | 50° | 61° | — | — |
| 2016 | 70° | 55° | 62° | — | — |
| 2015 | 59° | 53° | 56° | — | — |
| 2014 | 63° | 53° | 58° | — | — |
| 2013 | 66° | 50° | 58° | — | — |
| 2012 | 66° | 49° | 57° | — | — |
| 2011 | 62° | 51° | 57° | — | — |
| 2010 | 64° | 53° | 59° | 0.03" | — |
| 2009 | 59° | 50° | 55° | — | — |
| 2008 | 61° | 50° | 55° | — | — |
| 2007 | 60° | 50° | 55° | — | — |
| 2006 | 59° | 49° | 54° | — | — |
| 2005 | 66° | 58° | 62° | 0.76" | — |
| 2004 | 61° | 52° | 56° | — | — |
| 2003 | 68° | 51° | 60° | — | — |
| 2002 | 57° | 48° | 53° | — | — |
| 2001 | 69° | 52° | 60° | — | — |
| 2000 | 70° | 53° | 61° | — | — |
| 1999 | 60° | 49° | 54° | — | — |
| 1998 | 66° | 51° | 59° | — | — |
| 1997 | 73° | 56° | 64° | — | — |
| 1996 | 66° | 56° | 61° | — | — |
| 1995 | 69° | 52° | 60° | — | — |
| 1994 | 62° | 51° | 57° | — | — |
| 1993 | 76° | 55° | 65° | — | — |
| 1992 | 69° | 58° | 63° | — | — |
| 1991 | 60° | 48° | 54° | — | — |
| 1990 | 60° | 49° | 54° | — | — |
| 1989 | 65° | 49° | 57° | — | — |
| 1988 | 71° | 51° | 61° | — | — |
| 1987 | 60° | 52° | 56° | — | — |
| 1986 | 61° | 51° | 56° | — | — |
| 1985 | 63° | 52° | 57° | — | — |
| 1984 | 65° | 50° | 57° | — | — |
| 1983 | 77° | 54° | 65° | — | — |
| 1982 | 63° | 48° | 55° | — | — |
| 1981 | 62° | 53° | 58° | 0.38" | — |
| 1980 | 62° | 50° | 56° | — | — |
| 1979 | 61° | 51° | 56° | — | — |
| 1978warmest | 86° | 56° | 71° | — | — |
| 1977 | 56° | 48° | 52° | 0.2" | — |
| 1976 | 58° | 48° | 53° | — | — |
| 1975 | 58° | 50° | 54° | — | — |
| 1974coldest | 54° | 47° | 50° | — | — |
| 1973 | 59° | 50° | 55° | — | — |
| 1972 | 60° | 49° | 54° | — | — |
| 1971 | 68° | 50° | 59° | — | — |
55 years of data from SAN FRANCISCO DWTN