Weather on May 31
Fullerton, CA
55 Years of Data
Avg High
78°F
Avg Low
58°F
Warmest
2004
75°F avg
Coldest
1980
56°F avg
About This Date
May 31st in Fullerton, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 58°F. Over 55 years of records, the warmest May 31st was in 2004 (75°F average), while the coldest was 1980 (56°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 31st dates historically, with the wettest May 31st recording 6.35" 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 May 31st in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 63° | 75° | — | — |
| 2024 | 75° | 60° | 68° | — | — |
| 2023 | 66° | 58° | 62° | — | — |
| 2022 | 81° | 59° | 70° | — | — |
| 2021 | 79° | 61° | 70° | — | — |
| 2020 | 84° | 60° | 72° | — | — |
| 2019 | 75° | 61° | 68° | — | — |
| 2018 | 75° | 61° | 68° | — | — |
| 2017 | 74° | 61° | 67° | — | — |
| 2016 | 76° | 61° | 68° | — | — |
| 2015 | 81° | 59° | 70° | — | — |
| 2014 | 85° | 60° | 72° | — | — |
| 2013 | 79° | 62° | 70° | — | — |
| 2012 | 85° | 60° | 72° | — | — |
| 2011 | 80° | 52° | 66° | 6.35" | — |
| 2010 | 81° | 58° | 69° | — | — |
| 2009 | 73° | 61° | 67° | — | — |
| 2008 | 79° | 58° | 68° | — | — |
| 2007 | 76° | 58° | 67° | — | — |
| 2006 | 89° | 59° | 74° | — | — |
| 2005 | 79° | 59° | 69° | — | — |
| 2004warmest | 90° | 60° | 75° | — | — |
| 2003 | 79° | 62° | 70° | — | — |
| 2002 | 84° | 61° | 72° | — | — |
| 2001 | 82° | 59° | 71° | — | — |
| 2000 | 77° | 62° | 70° | — | — |
| 1999 | 73° | 57° | 65° | — | — |
| 1998 | 74° | 54° | 64° | — | — |
| 1997 | 82° | 64° | 73° | — | — |
| 1996 | 75° | 52° | 63° | — | — |
| 1995 | 81° | 60° | 70° | — | — |
| 1994 | 74° | 57° | 65° | — | — |
| 1993 | 78° | 62° | 70° | — | — |
| 1992 | 85° | 63° | 74° | — | — |
| 1991 | 82° | 51° | 67° | — | — |
| 1990 | 71° | 58° | 64° | — | — |
| 1989 | 75° | 56° | 65° | — | — |
| 1988 | 76° | 52° | 64° | — | — |
| 1987 | 80° | 57° | 69° | — | — |
| 1986 | 75° | 60° | 68° | — | — |
| 1985 | 69° | 58° | 63° | — | — |
| 1984 | 76° | 63° | 69° | — | — |
| 1983 | 70° | 59° | 64° | — | — |
| 1982 | 74° | 46° | 60° | — | — |
| 1981 | 79° | 60° | 69° | — | — |
| 1980coldest | 68° | 44° | 56° | — | — |
| 1979 | 75° | 50° | 63° | — | — |
| 1978 | 77° | 57° | 67° | — | — |
| 1977 | 85° | 55° | 70° | — | — |
| 1976 | 79° | 48° | 63° | — | — |
| 1975 | 78° | 56° | 67° | — | — |
| 1974 | 73° | 55° | 64° | — | — |
| 1973 | 69° | 58° | 63° | 0.03" | — |
| 1972 | 89° | 57° | 73° | — | — |
| 1971 | 69° | 52° | 60° | — | — |
55 years of data from ANAHEIM