Weather on July 20
Fullerton, CA
55 Years of Data
Avg High
86°F
Avg Low
64°F
Warmest
2023
83°F avg
Coldest
1973
68°F avg
About This Date
July 20th 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 July 20th was in 2023 (83°F average), while the coldest was 1973 (68°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 4% of July 20th dates historically, with the wettest July 20th recording 1.73" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for July 20th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 67° | 73° | — | — |
| 2024 | 91° | 67° | 79° | — | — |
| 2023warmest | 97° | 69° | 83° | — | — |
| 2022 | 95° | 69° | 82° | — | — |
| 2021 | 94° | 68° | 81° | — | — |
| 2020 | 87° | 63° | 75° | — | — |
| 2019 | 85° | 66° | 75° | — | — |
| 2018 | 86° | 69° | 78° | — | — |
| 2017 | 91° | 70° | 80° | — | — |
| 2016 | 98° | 66° | 82° | — | — |
| 2015 | 87° | 72° | 79° | 1.73" | — |
| 2014 | 84° | 68° | 76° | — | — |
| 2013 | 79° | 65° | 72° | 0.05" | — |
| 2012 | 91° | 67° | 79° | — | — |
| 2011 | 86° | 63° | 74° | — | — |
| 2010 | 80° | 64° | 72° | — | — |
| 2009 | 94° | 70° | 82° | — | — |
| 2008 | 77° | 65° | 71° | — | — |
| 2007 | 85° | 65° | 75° | — | — |
| 2006 | 90° | 69° | 79° | — | — |
| 2005 | 96° | 67° | 81° | — | — |
| 2004 | 92° | 67° | 79° | — | — |
| 2003 | 92° | 69° | 80° | — | — |
| 2002 | 77° | 63° | 70° | — | — |
| 2001 | 81° | 63° | 72° | — | — |
| 2000 | 92° | 60° | 76° | — | — |
| 1999 | 83° | 59° | 71° | — | — |
| 1998 | 84° | 64° | 74° | — | — |
| 1997 | 77° | 63° | 70° | — | — |
| 1996 | 85° | 61° | 73° | — | — |
| 1995 | 84° | 57° | 71° | — | — |
| 1994 | 79° | 60° | 69° | — | — |
| 1993 | 80° | 63° | 71° | — | — |
| 1992 | 88° | 68° | 78° | — | — |
| 1991 | 76° | 61° | 68° | — | — |
| 1990 | 93° | 68° | 81° | — | — |
| 1989 | 85° | 67° | 76° | — | — |
| 1988 | 90° | 66° | 78° | — | — |
| 1987 | 78° | 59° | 69° | — | — |
| 1986 | 87° | 61° | 74° | — | — |
| 1985 | 85° | 68° | 76° | — | — |
| 1984 | 84° | 67° | 75° | — | — |
| 1983 | 91° | 62° | 77° | — | — |
| 1982 | 99° | 57° | 78° | — | — |
| 1981 | 96° | 56° | 76° | — | — |
| 1980 | 88° | 58° | 73° | — | — |
| 1979 | 83° | 65° | 74° | — | — |
| 1978 | 87° | 54° | 70° | — | — |
| 1977 | 84° | 61° | 72° | — | — |
| 1976 | 85° | 64° | 74° | — | — |
| 1975 | 84° | 60° | 72° | — | — |
| 1974 | 94° | 65° | 79° | — | — |
| 1973coldest | 74° | 62° | 68° | — | — |
| 1972 | 79° | 60° | 69° | — | — |
| 1971 | 87° | 61° | 74° | — | — |
55 years of data from ANAHEIM