Weather on October 31
Fullerton, CA
55 Years of Data
Avg High
78°F
Avg Low
54°F
Warmest
2008
78°F avg
Coldest
1971
52°F avg
About This Date
October 31st in Fullerton, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 54°F. Over 55 years of records, the warmest October 31st was in 2008 (78°F average), while the coldest was 1971 (52°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 7% of October 31st dates historically, with the wettest October 31st recording 1.7" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 59° | 69° | — | — |
| 2024 | 72° | 50° | 61° | — | — |
| 2023 | 89° | 67° | 78° | — | — |
| 2022 | 85° | 56° | 70° | — | — |
| 2021 | 73° | 61° | 67° | — | — |
| 2020 | 84° | 53° | 69° | — | — |
| 2019 | 82° | 61° | 71° | — | — |
| 2018 | 85° | 56° | 70° | — | — |
| 2017 | 71° | 62° | 67° | — | — |
| 2016 | 72° | 59° | 65° | — | — |
| 2015 | 91° | 58° | 74° | — | — |
| 2014 | 79° | 58° | 68° | — | — |
| 2013 | 83° | 51° | 67° | — | — |
| 2012 | 77° | 53° | 65° | — | — |
| 2011 | 81° | 51° | 66° | — | — |
| 2010 | 73° | 52° | 62° | — | — |
| 2009 | 90° | 50° | 70° | — | — |
| 2008warmest | 92° | 65° | 78° | — | — |
| 2007 | 80° | 55° | 68° | — | — |
| 2006 | 69° | 60° | 65° | — | — |
| 2005 | 90° | 51° | 70° | — | — |
| 2004 | 75° | 50° | 63° | — | — |
| 2003 | 68° | 53° | 61° | — | — |
| 2002 | 69° | 46° | 58° | — | — |
| 2001 | 72° | 55° | 63° | — | — |
| 2000 | 68° | 49° | 58° | — | — |
| 1999 | 93° | 61° | 77° | — | — |
| 1998 | 74° | 55° | 64° | — | — |
| 1997 | 83° | 55° | 69° | — | — |
| 1996 | 67° | 47° | 57° | 0.03" | — |
| 1995 | 72° | 57° | 64° | — | — |
| 1994 | 84° | 50° | 67° | — | — |
| 1993 | 80° | 56° | 68° | — | — |
| 1992 | 75° | 55° | 65° | — | — |
| 1991 | 74° | 55° | 64° | — | — |
| 1990 | 77° | 53° | 65° | — | — |
| 1989 | 80° | 52° | 66° | — | — |
| 1988 | 81° | 55° | 68° | — | — |
| 1987 | 69° | 58° | 63° | 1.7" | — |
| 1986 | 73° | 61° | 67° | — | — |
| 1985 | 75° | 69° | 72° | — | — |
| 1984 | 71° | 55° | 63° | — | — |
| 1983 | 75° | 63° | 69° | — | — |
| 1982 | 80° | 52° | 66° | — | — |
| 1981 | 85° | 60° | 72° | — | — |
| 1980 | 88° | 57° | 72° | — | — |
| 1979 | 79° | 42° | 60° | — | — |
| 1978 | 72° | 46° | 59° | 0.05" | — |
| 1977 | 76° | 47° | 61° | — | — |
| 1976 | 81° | 45° | 63° | — | — |
| 1975 | 71° | 42° | 57° | — | — |
| 1974 | 67° | 44° | 55° | 0.05" | — |
| 1973 | 90° | 55° | 72° | — | — |
| 1972 | 72° | 38° | 55° | — | — |
| 1971coldest | 69° | 36° | 52° | — | — |
55 years of data from ANAHEIM