Weather on May 18
San Francisco, CA
55 Years of Data
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 56 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 |
|---|---|---|---|---|---|
| 2026 | 79° | 55° | 67° | — | — |
| 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° | — | — |
San Francisco, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Francisco, CA Monthly Precipitation
Average rainfall per month, in inches.
San Francisco, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Francisco, CA
Most pleasant months in San Francisco, CA: July, August.