Weather on August 17
Fullerton, CA
55 Years of Data
Avg High
86°F
Avg Low
64°F
Warmest
1992
85°F avg
Coldest
1975
66°F avg
About This Date
August 17th in Fullerton, CA typically brings warm summer weather, with average highs around 86°F and lows near 64°F. Over 55 years of records, the warmest August 17th was in 1992 (85°F average), while the coldest was 1975 (66°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 17th dates historically, with the wettest August 17th recording 6.12" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for August 17th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 67° | 74° | — | — |
| 2024 | 83° | 69° | 76° | — | — |
| 2023 | 95° | 67° | 81° | — | — |
| 2022 | 95° | 70° | 82° | — | — |
| 2021 | 88° | 70° | 79° | — | — |
| 2020 | 93° | 72° | 82° | — | — |
| 2019 | 82° | 65° | 73° | — | — |
| 2018 | 90° | 72° | 81° | — | — |
| 2017 | 85° | 64° | 74° | — | — |
| 2016 | 98° | 62° | 80° | — | — |
| 2015 | 85° | 70° | 77° | — | — |
| 2014 | 93° | 67° | 80° | — | — |
| 2013 | 90° | 64° | 77° | — | — |
| 2012 | 98° | 72° | 85° | — | — |
| 2011 | 87° | 63° | 75° | — | — |
| 2010 | 93° | 67° | 80° | — | — |
| 2009 | 81° | 64° | 72° | — | — |
| 2008 | 87° | 67° | 77° | — | — |
| 2007 | 90° | 71° | 80° | — | — |
| 2006 | 88° | 64° | 76° | — | — |
| 2005 | 82° | 60° | 71° | — | — |
| 2004 | 83° | 65° | 74° | — | — |
| 2003 | 94° | 66° | 80° | — | — |
| 2002 | 79° | 64° | 71° | — | — |
| 2001 | 91° | 62° | 77° | — | — |
| 2000 | 93° | 67° | 80° | — | — |
| 1999 | 89° | 56° | 72° | — | — |
| 1998 | 81° | 69° | 75° | — | — |
| 1997 | 83° | 67° | 75° | — | — |
| 1996 | 85° | 69° | 77° | — | — |
| 1995 | 80° | 61° | 70° | — | — |
| 1994 | 90° | 69° | 79° | — | — |
| 1993 | 82° | 61° | 71° | — | — |
| 1992warmest | 101° | 70° | 85° | — | — |
| 1991 | 81° | 66° | 73° | — | — |
| 1990 | 83° | 60° | 71° | — | — |
| 1989 | 81° | 64° | 72° | — | — |
| 1988 | 78° | 62° | 70° | — | — |
| 1987 | 78° | 62° | 70° | — | — |
| 1986 | 88° | 60° | 74° | — | — |
| 1985 | 78° | 64° | 71° | — | — |
| 1984 | 89° | 68° | 79° | — | — |
| 1983 | 88° | 73° | 80° | 0.05" | — |
| 1982 | 96° | 53° | 75° | — | — |
| 1981 | 87° | 64° | 76° | — | — |
| 1980 | 85° | 65° | 75° | — | — |
| 1979 | 84° | 62° | 73° | — | — |
| 1978 | 82° | 54° | 68° | — | — |
| 1977 | 78° | 61° | 69° | 6.12" | — |
| 1976 | 79° | 58° | 68° | — | — |
| 1975coldest | 79° | 54° | 66° | — | — |
| 1974 | 88° | 50° | 69° | — | — |
| 1973 | 85° | 62° | 73° | — | — |
| 1972 | 85° | 53° | 69° | — | — |
| 1971 | 88° | 61° | 74° | — | — |
55 years of data from ANAHEIM