Weather on March 18
San Francisco, CA
55 Years of Data
Avg High
64°F
Avg Low
49°F
Warmest
1978
70°F avg
Coldest
1982
48°F avg
About This Date
March 18th in San Francisco, CA typically brings mild spring weather, with average highs around 64°F and lows near 49°F. Over 56 years of records, the warmest March 18th was in 1978 (70°F average), while the coldest was 1982 (48°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 25% of March 18th dates historically, with the wettest March 18th recording 3.99" of rain. The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.0°F cooler on this date compared to 20-30 years ago.
Planning for March 18th in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 84° | 51° | 68° | — | — |
| 2025 | 59° | 45° | 52° | — | — |
| 2024 | 60° | 51° | 56° | — | — |
| 2023 | 64° | 49° | 56° | 0.05" | — |
| 2022 | 64° | 48° | 56° | — | — |
| 2021 | 54° | 49° | 51° | 1.09" | — |
| 2020 | 55° | 47° | 51° | 0.08" | — |
| 2019 | 73° | 51° | 62° | — | — |
| 2018 | 56° | 45° | 50° | — | — |
| 2017 | 64° | 53° | 59° | — | — |
| 2016 | 61° | 52° | 56° | — | — |
| 2015 | 66° | 52° | 59° | — | — |
| 2014 | 69° | 50° | 60° | — | — |
| 2013 | 62° | 47° | 54° | — | — |
| 2012 | 51° | 44° | 48° | — | — |
| 2011 | 54° | 48° | 51° | 2.46" | — |
| 2010 | 72° | 50° | 61° | — | — |
| 2009 | 67° | 49° | 58° | — | — |
| 2008 | 62° | 49° | 55° | — | — |
| 2007 | 63° | 49° | 56° | — | — |
| 2006 | 58° | 44° | 51° | — | — |
| 2005 | 57° | 53° | 55° | 1.42" | — |
| 2004 | 81° | 52° | 66° | — | — |
| 2003 | 61° | 48° | 54° | — | — |
| 2002 | 59° | 44° | 52° | — | — |
| 2001 | 73° | 49° | 61° | — | — |
| 2000 | 70° | 52° | 61° | — | — |
| 1999 | 60° | 47° | 53° | — | — |
| 1998 | 70° | 48° | 59° | — | — |
| 1997 | 76° | 52° | 64° | — | — |
| 1996 | 79° | 53° | 66° | — | — |
| 1995 | 64° | 52° | 58° | 0.64" | — |
| 1994 | 62° | 52° | 57° | — | — |
| 1993 | 66° | 54° | 60° | 0.3" | — |
| 1992 | 71° | 50° | 61° | — | — |
| 1991 | 61° | 44° | 52° | — | — |
| 1990 | 65° | 49° | 57° | — | — |
| 1989 | 57° | 52° | 54° | 3.99" | — |
| 1988 | 74° | 47° | 60° | — | — |
| 1987 | 57° | 48° | 53° | 0.15" | — |
| 1986 | 74° | 54° | 64° | — | — |
| 1985 | 58° | 47° | 52° | 0.18" | — |
| 1984 | 63° | 47° | 55° | — | — |
| 1983 | 59° | 48° | 54° | — | — |
| 1982coldest | 52° | 44° | 48° | 0.23" | — |
| 1981 | 56° | 50° | 53° | 1.6" | — |
| 1980 | 64° | 49° | 56° | — | — |
| 1979 | 54° | 50° | 52° | 0.1" | — |
| 1978warmest | 77° | 62° | 70° | — | — |
| 1977 | 62° | 48° | 55° | — | — |
| 1976 | 55° | 48° | 52° | 0.61" | — |
| 1975 | 63° | 52° | 57° | — | — |
| 1974 | 60° | 49° | 54° | — | — |
| 1973 | 56° | 43° | 49° | — | — |
| 1972 | 63° | 48° | 55° | — | — |
| 1971 | 67° | 50° | 58° | — | — |
56 years of data from SAN FRANCISCO DWTN