Weather on March 18
San Diego, CA
55 Years of Data
Avg High
67°F
Avg Low
54°F
Warmest
2026
72°F avg
Coldest
2002
53°F avg
About This Date
March 18th in San Diego, CA typically brings mild spring weather, with average highs around 67°F and lows near 54°F. Over 56 years of records, the warmest March 18th was in 2026 (72°F average), while the coldest was 2002 (53°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 18th dates historically, with the wettest March 18th recording 1.42" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in San Diego, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 85° | 60° | 72° | — | — |
| 2025 | 64° | 52° | 58° | — | — |
| 2024 | 76° | 51° | 63° | — | — |
| 2023 | 76° | 50° | 63° | — | — |
| 2022 | 74° | 50° | 62° | — | — |
| 2021 | 63° | 50° | 56° | — | — |
| 2020 | 62° | 52° | 57° | 0.58" | — |
| 2019 | 66° | 56° | 61° | — | — |
| 2018 | 63° | 51° | 57° | — | — |
| 2017 | 69° | 55° | 62° | — | — |
| 2016 | 70° | 60° | 65° | — | — |
| 2015 | 68° | 63° | 65° | — | — |
| 2014 | 67° | 62° | 64° | — | — |
| 2013 | 62° | 56° | 59° | — | — |
| 2012 | 57° | 48° | 53° | 0.33" | — |
| 2011 | 69° | 53° | 61° | — | — |
| 2010 | 64° | 57° | 61° | — | — |
| 2009 | 74° | 52° | 63° | — | — |
| 2008 | 66° | 48° | 57° | — | — |
| 2007 | 59° | 55° | 57° | — | — |
| 2006 | 61° | 52° | 56° | 0.08" | — |
| 2005 | 63° | 56° | 59° | 0.03" | — |
| 2004 | 65° | 57° | 61° | — | — |
| 2003 | 65° | 52° | 58° | — | — |
| 2002coldest | 60° | 47° | 53° | 0.15" | — |
| 2001 | 73° | 54° | 63° | — | — |
| 2000 | 70° | 56° | 63° | — | — |
| 1999 | 65° | 51° | 58° | — | — |
| 1998 | 66° | 58° | 62° | — | — |
| 1997 | 75° | 53° | 64° | — | — |
| 1996 | 65° | 56° | 60° | — | — |
| 1995 | 68° | 60° | 64° | — | — |
| 1994 | 73° | 59° | 66° | 0.2" | — |
| 1993 | 67° | 58° | 62° | — | — |
| 1992 | 65° | 54° | 59° | — | — |
| 1991 | 64° | 47° | 55° | 1.09" | — |
| 1990 | 70° | 50° | 60° | — | — |
| 1989 | 67° | 52° | 59° | — | — |
| 1988 | 74° | 49° | 61° | — | — |
| 1987 | 62° | 51° | 57° | — | — |
| 1986 | 65° | 50° | 57° | — | — |
| 1985 | 62° | 57° | 60° | 0.05" | — |
| 1984 | 75° | 55° | 65° | — | — |
| 1983 | 65° | 53° | 59° | 1.42" | — |
| 1982 | 63° | 50° | 56° | 0.74" | — |
| 1981 | 69° | 55° | 62° | — | — |
| 1980 | 65° | 52° | 58° | 0.1" | — |
| 1979 | 61° | 52° | 56° | 0.1" | — |
| 1978 | 72° | 64° | 68° | — | — |
| 1977 | 62° | 49° | 55° | — | — |
| 1976 | 67° | 55° | 61° | — | — |
| 1975 | 68° | 49° | 58° | — | — |
| 1974 | 63° | 57° | 60° | — | — |
| 1973 | 64° | 55° | 60° | — | — |
| 1972 | 63° | 56° | 59° | — | — |
| 1971 | 69° | 51° | 60° | — | — |
56 years of data from SAN DIEGO INTL AP