Weather on October 17
Fullerton, CA
55 Years of Data
Avg High
81°F
Avg Low
57°F
Warmest
2017
80°F avg
Coldest
1971
53°F avg
About This Date
October 17th in Fullerton, CA typically brings warm fall weather, with average highs around 81°F and lows near 57°F. Over 55 years of records, the warmest October 17th was in 2017 (80°F average), while the coldest was 1971 (53°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 17th dates historically, with the wettest October 17th recording 4.65" of rain. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for October 17th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 54° | 69° | — | — |
| 2024 | 70° | 62° | 66° | — | — |
| 2023 | 83° | 62° | 72° | — | — |
| 2022 | 84° | 61° | 72° | — | — |
| 2021 | 91° | 57° | 74° | — | — |
| 2020 | 89° | 62° | 76° | — | — |
| 2019 | 85° | 62° | 73° | — | — |
| 2018 | 86° | 57° | 72° | — | — |
| 2017warmest | 96° | 65° | 80° | — | — |
| 2016 | 75° | 62° | 69° | 0.56" | — |
| 2015 | 84° | 70° | 77° | — | — |
| 2014 | 79° | 60° | 69° | — | — |
| 2013 | 86° | 57° | 72° | — | — |
| 2012 | 96° | 61° | 78° | — | — |
| 2011 | 82° | 57° | 70° | — | — |
| 2010 | 67° | 61° | 64° | 0.05" | — |
| 2009 | 95° | 61° | 78° | — | — |
| 2008 | 96° | 59° | 78° | — | — |
| 2007 | 73° | 57° | 65° | — | — |
| 2006 | 74° | 59° | 66° | — | — |
| 2005 | 67° | 55° | 61° | 0.46" | — |
| 2004 | 72° | 58° | 65° | 4.65" | — |
| 2003 | 90° | 57° | 73° | — | — |
| 2002 | 67° | 55° | 61° | — | — |
| 2001 | 82° | 55° | 69° | — | — |
| 2000 | 82° | 52° | 67° | — | — |
| 1999 | 88° | 53° | 70° | — | — |
| 1998 | 81° | 59° | 70° | — | — |
| 1997 | 96° | 61° | 78° | — | — |
| 1996 | 78° | 62° | 70° | — | — |
| 1995 | 79° | 54° | 66° | — | — |
| 1994 | 77° | 51° | 64° | — | — |
| 1993 | 71° | 55° | 63° | — | — |
| 1992 | 79° | 54° | 66° | — | — |
| 1991 | 80° | 61° | 70° | — | — |
| 1990 | 80° | 63° | 71° | — | — |
| 1989 | 86° | 53° | 70° | — | — |
| 1988 | 90° | 63° | 76° | — | — |
| 1987 | 78° | 64° | 71° | — | — |
| 1986 | 74° | 58° | 66° | — | — |
| 1985 | 75° | 61° | 68° | — | — |
| 1984 | 73° | 53° | 63° | 0.38" | — |
| 1983 | 75° | 64° | 70° | — | — |
| 1982 | 84° | 48° | 66° | — | — |
| 1981 | 84° | 42° | 63° | — | — |
| 1980 | 75° | 45° | 60° | — | — |
| 1979 | 73° | 49° | 61° | — | — |
| 1978 | 78° | 59° | 69° | — | — |
| 1977 | 80° | 54° | 67° | — | — |
| 1976 | 80° | 55° | 68° | — | — |
| 1975 | 79° | 49° | 64° | — | — |
| 1974 | 94° | 58° | 76° | — | — |
| 1973 | 95° | 50° | 73° | — | — |
| 1972 | 73° | 54° | 63° | — | — |
| 1971coldest | 65° | 41° | 53° | 0.08" | — |
55 years of data from ANAHEIM