Weather on March 20
Fullerton, CA
55 Years of Data
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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 94° | 63° | 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° | — | — |
Fullerton, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Fullerton, CA Monthly Precipitation
Average rainfall per month, in inches.
Fullerton, 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 Fullerton, CA
Fullerton, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.