Weather on March 18
San Diego, CA
55 Years of Data
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.
| 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° | — | — |
San Diego, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Diego, CA Monthly Precipitation
Average rainfall per month, in inches.
San Diego, 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 Diego, CA
Most pleasant months in San Diego, CA: June.