Weather on September 5
Fullerton, CA
55 Years of Data
Avg High
91°F
Avg Low
65°F
Warmest
2020
90°F avg
Coldest
1985
66°F avg
About This Date
September 5th in Fullerton, CA typically brings hot fall weather, with average highs around 91°F and lows near 65°F — a 26°F daily swing. Over 55 years of records, the warmest September 5th was in 2020 (90°F average), while the coldest was 1985 (66°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 5th dates historically, with the wettest September 5th recording 1.6" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for September 5th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 67° | 78° | — | — |
| 2024 | 104° | 72° | 88° | — | — |
| 2023 | 77° | 66° | 72° | — | — |
| 2022 | 102° | 78° | 90° | — | — |
| 2021 | 102° | 66° | 84° | — | — |
| 2020warmest | 109° | 71° | 90° | — | — |
| 2019 | 97° | 75° | 86° | — | — |
| 2018 | 85° | 70° | 77° | — | — |
| 2017 | 89° | 69° | 79° | — | — |
| 2016 | 81° | 66° | 73° | — | — |
| 2015 | 86° | 62° | 74° | — | — |
| 2014 | 89° | 63° | 76° | — | — |
| 2013 | 97° | 71° | 84° | — | — |
| 2012 | 87° | 72° | 79° | — | — |
| 2011 | 91° | 65° | 78° | — | — |
| 2010 | 96° | 62° | 79° | — | — |
| 2009 | 93° | 69° | 81° | — | — |
| 2008 | 93° | 66° | 80° | — | — |
| 2007 | 93° | 68° | 81° | — | — |
| 2006 | 99° | 70° | 84° | — | — |
| 2005 | 92° | 57° | 74° | — | — |
| 2004 | 108° | 69° | 88° | — | — |
| 2003 | 98° | 69° | 84° | — | — |
| 2002 | 89° | 68° | 79° | — | — |
| 2001 | 84° | 66° | 75° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 77° | 58° | 67° | — | — |
| 1998 | 82° | 70° | 76° | — | — |
| 1997 | 97° | 71° | 84° | — | — |
| 1996 | 84° | 66° | 75° | — | — |
| 1995 | 97° | 63° | 80° | — | — |
| 1994 | 90° | 64° | 77° | — | — |
| 1993 | 88° | 64° | 76° | — | — |
| 1992 | 88° | 61° | 74° | — | — |
| 1991 | 81° | 64° | 72° | 0.03" | — |
| 1990 | 92° | 65° | 78° | — | — |
| 1989 | 97° | 61° | 79° | — | — |
| 1988 | 102° | 74° | 88° | — | — |
| 1987 | 78° | 66° | 72° | — | — |
| 1986 | 83° | 66° | 74° | — | — |
| 1985coldest | 72° | 60° | 66° | 0.81" | — |
| 1984 | 104° | 72° | 88° | — | — |
| 1983 | 81° | 65° | 73° | — | — |
| 1982 | 101° | 64° | 82° | — | — |
| 1981 | 92° | 60° | 76° | — | — |
| 1980 | 86° | 57° | 72° | — | — |
| 1979 | 91° | 55° | 73° | — | — |
| 1978 | 84° | 64° | 74° | 1.6" | — |
| 1977 | 94° | 56° | 75° | — | — |
| 1976 | 86° | 62° | 74° | — | — |
| 1975 | 88° | 56° | 72° | — | — |
| 1974 | 95° | 61° | 78° | — | — |
| 1973 | 81° | 61° | 71° | — | — |
| 1972 | 88° | 62° | 75° | — | — |
| 1971 | 92° | 56° | 74° | — | — |
55 years of data from ANAHEIM