Weather on March 31
Fullerton, CA
55 Years of Data
Avg High
74°F
Avg Low
50°F
Warmest
2003
75°F avg
Coldest
1977
49°F avg
About This Date
March 31st in Fullerton, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 50°F. Over 56 years of records, the warmest March 31st was in 2003 (75°F average), while the coldest was 1977 (49°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of March 31st dates historically, with the wettest March 31st recording 1.63" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 72° | 63° | 67° | 0.13" | — |
| 2025 | 68° | 55° | 62° | 0.08" | — |
| 2024 | 59° | 50° | 55° | 1.63" | — |
| 2023 | 69° | 45° | 57° | — | — |
| 2022 | 70° | 58° | 64° | — | — |
| 2021 | 91° | 54° | 72° | — | — |
| 2020 | 78° | 54° | 66° | — | — |
| 2019 | 89° | 54° | 71° | — | — |
| 2018 | 82° | 52° | 67° | — | — |
| 2017 | 72° | 55° | 63° | — | — |
| 2016 | 71° | 48° | 60° | — | — |
| 2015 | 76° | 58° | 67° | — | — |
| 2014 | 72° | 52° | 62° | — | — |
| 2013 | 70° | 55° | 62° | — | — |
| 2012 | 69° | 53° | 61° | — | — |
| 2011 | 93° | 57° | 75° | — | — |
| 2010 | 66° | 54° | 60° | — | — |
| 2009 | 73° | 49° | 61° | — | — |
| 2008 | 69° | 48° | 59° | — | — |
| 2007 | 84° | 48° | 66° | — | — |
| 2006 | 62° | 51° | 57° | 0.03" | — |
| 2005 | 79° | 54° | 66° | — | — |
| 2004 | 74° | 54° | 64° | — | — |
| 2003warmest | 90° | 60° | 75° | — | — |
| 2002 | 72° | 52° | 62° | — | — |
| 2001 | 76° | 59° | 67° | — | — |
| 2000 | 82° | 46° | 64° | — | — |
| 1999 | 63° | 50° | 56° | — | — |
| 1998 | 63° | 44° | 53° | — | — |
| 1997 | 67° | 56° | 61° | — | — |
| 1996 | 73° | 45° | 59° | — | — |
| 1995 | 80° | 49° | 64° | — | — |
| 1994 | 75° | 53° | 64° | — | — |
| 1993 | 72° | 49° | 60° | — | — |
| 1992 | 65° | 51° | 58° | — | — |
| 1991 | 74° | 53° | 63° | — | — |
| 1990 | 66° | 47° | 56° | — | — |
| 1989 | 84° | 54° | 69° | — | — |
| 1988 | 78° | 48° | 63° | — | — |
| 1987 | 82° | 48° | 65° | — | — |
| 1986 | 75° | 56° | 65° | — | — |
| 1985 | 82° | 46° | 64° | — | — |
| 1984 | 68° | 50° | 59° | — | — |
| 1983 | 74° | 52° | 63° | — | — |
| 1982 | 67° | 38° | 52° | — | — |
| 1981 | 75° | 44° | 60° | — | — |
| 1980 | 74° | 48° | 61° | — | — |
| 1979 | 76° | 40° | 58° | — | — |
| 1978 | 67° | 49° | 58° | 1.27" | — |
| 1977coldest | 62° | 35° | 49° | — | — |
| 1976 | 80° | 41° | 61° | — | — |
| 1975 | 75° | 36° | 55° | 0.25" | — |
| 1974 | 71° | 43° | 57° | — | — |
| 1973 | 65° | 40° | 52° | — | — |
| 1972 | 80° | 43° | 61° | — | — |
| 1971 | 74° | 52° | 63° | — | — |
56 years of data from ANAHEIM