Weather on March 20
Fullerton, CA
55 Years of Data
Avg High
73°F
Avg Low
51°F
Warmest
2026
78°F avg
Coldest
1979
51°F avg
About This Date
March 20th in Fullerton, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 51°F. Over 56 years of records, the warmest March 20th was in 2026 (78°F average), while the coldest was 1979 (51°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 20th dates historically, with the wettest March 20th recording 2.34" 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 March 20th in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 94° | 62° | 78° | — | — |
| 2025 | 72° | 51° | 61° | — | — |
| 2024 | 73° | 53° | 63° | — | — |
| 2023 | 62° | 54° | 58° | 0.89" | — |
| 2022 | 75° | 55° | 65° | 0.3" | — |
| 2021 | 74° | 56° | 65° | — | — |
| 2020 | 67° | 51° | 59° | 0.3" | — |
| 2019 | 69° | 58° | 63° | — | — |
| 2018 | 75° | 54° | 64° | — | — |
| 2017 | 75° | 58° | 66° | — | — |
| 2016 | 76° | 55° | 65° | — | — |
| 2015 | 80° | 58° | 69° | — | — |
| 2014 | 77° | 52° | 64° | — | — |
| 2013 | 73° | 52° | 62° | — | — |
| 2012 | 73° | 43° | 58° | — | — |
| 2011 | 61° | 53° | 57° | 0.05" | — |
| 2010 | 83° | 52° | 67° | — | — |
| 2009 | 66° | 55° | 61° | — | — |
| 2008 | 72° | 50° | 61° | — | — |
| 2007 | 66° | 53° | 60° | — | — |
| 2006 | 61° | 45° | 53° | 0.69" | — |
| 2005 | 67° | 52° | 59° | 0.15" | — |
| 2004 | 78° | 56° | 67° | — | — |
| 2003 | 67° | 61° | 64° | — | — |
| 2002 | 80° | 46° | 63° | — | — |
| 2001 | 88° | 54° | 71° | — | — |
| 2000 | 72° | 55° | 63° | — | — |
| 1999 | 65° | 48° | 56° | 0.23" | — |
| 1998 | 73° | 49° | 61° | — | — |
| 1997 | 92° | 58° | 75° | — | — |
| 1996 | 76° | 55° | 65° | — | — |
| 1995 | 71° | 60° | 66° | — | — |
| 1994 | 71° | 56° | 63° | — | — |
| 1993 | 73° | 56° | 64° | — | — |
| 1992 | 66° | 54° | 60° | 0.56" | — |
| 1991 | 59° | 48° | 54° | 2.24" | — |
| 1990 | 87° | 57° | 72° | — | — |
| 1989 | 85° | 51° | 68° | — | — |
| 1988 | 90° | 54° | 72° | — | — |
| 1987 | 67° | 44° | 55° | — | — |
| 1986 | 83° | 47° | 65° | — | — |
| 1985 | 66° | 50° | 58° | — | — |
| 1984 | 82° | 52° | 67° | — | — |
| 1983 | 64° | 47° | 55° | — | — |
| 1982 | 70° | 34° | 52° | — | — |
| 1981 | 65° | 48° | 56° | 1.27" | — |
| 1980 | 70° | 43° | 56° | — | — |
| 1979coldest | 60° | 43° | 51° | 0.51" | — |
| 1978 | 69° | 52° | 60° | — | — |
| 1977 | 70° | 40° | 55° | — | — |
| 1976 | 82° | 40° | 61° | — | — |
| 1975 | 67° | 45° | 56° | — | — |
| 1974 | 62° | 50° | 56° | — | — |
| 1973 | 59° | 45° | 52° | 2.34" | — |
| 1972 | 70° | 48° | 59° | — | — |
| 1971 | 73° | 40° | 56° | — | — |
56 years of data from ANAHEIM