Weather on June 21
Fullerton, CA
55 Years of Data
Avg High
82°F
Avg Low
61°F
Warmest
2008
87°F avg
Coldest
1982
63°F avg
About This Date
June 21st in Fullerton, CA typically brings warm summer weather, with average highs around 82°F and lows near 61°F. Over 55 years of records, the warmest June 21st was in 2008 (87°F average), while the coldest was 1982 (63°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 63° | 68° | — | — |
| 2024 | 84° | 61° | 72° | — | — |
| 2023 | 83° | 57° | 70° | — | — |
| 2022 | 98° | 65° | 81° | — | — |
| 2021 | 85° | 63° | 74° | — | — |
| 2020 | 81° | 65° | 73° | — | — |
| 2019 | 72° | 62° | 67° | — | — |
| 2018 | 81° | 65° | 73° | — | — |
| 2017 | 89° | 66° | 78° | — | — |
| 2016 | 105° | 70° | 87° | — | — |
| 2015 | 87° | 65° | 76° | — | — |
| 2014 | 84° | 62° | 73° | — | — |
| 2013 | 82° | 61° | 71° | — | — |
| 2012 | 79° | 62° | 70° | — | — |
| 2011 | 88° | 63° | 75° | — | — |
| 2010 | 75° | 62° | 69° | — | — |
| 2009 | 78° | 64° | 71° | — | — |
| 2008warmest | 102° | 71° | 87° | — | — |
| 2007 | 89° | 61° | 75° | — | — |
| 2006 | 84° | 64° | 74° | — | — |
| 2005 | 92° | 60° | 76° | — | — |
| 2004 | 76° | 63° | 69° | — | — |
| 2003 | 68° | 61° | 64° | — | — |
| 2002 | 74° | 62° | 68° | — | — |
| 2001 | 86° | 58° | 72° | — | — |
| 2000 | 82° | 60° | 71° | — | — |
| 1999 | 74° | 59° | 66° | — | — |
| 1998 | 79° | 61° | 70° | — | — |
| 1997 | 76° | 62° | 69° | — | — |
| 1996 | 76° | 63° | 69° | — | — |
| 1995 | 75° | 58° | 66° | — | — |
| 1994 | 84° | 61° | 72° | — | — |
| 1993 | 79° | 62° | 70° | — | — |
| 1992 | 81° | 61° | 71° | — | — |
| 1991 | 74° | 60° | 67° | — | — |
| 1990 | 81° | 63° | 72° | — | — |
| 1989 | 86° | 60° | 73° | — | — |
| 1988 | 78° | 56° | 67° | — | — |
| 1987 | 75° | 61° | 68° | — | — |
| 1986 | 80° | 61° | 70° | — | — |
| 1985 | 75° | 60° | 68° | — | — |
| 1984 | 78° | 62° | 70° | — | — |
| 1983 | 77° | 62° | 70° | — | — |
| 1982coldest | 72° | 55° | 63° | — | — |
| 1981 | 93° | 60° | 77° | — | — |
| 1980 | 84° | 52° | 68° | — | — |
| 1979 | 81° | 53° | 67° | — | — |
| 1978 | 90° | 53° | 71° | — | — |
| 1977 | 78° | 57° | 68° | — | — |
| 1976 | 82° | 51° | 67° | — | — |
| 1975 | 78° | 51° | 65° | — | — |
| 1974 | 86° | 52° | 69° | — | — |
| 1973 | 105° | 61° | 83° | — | — |
| 1972 | 81° | 65° | 73° | — | — |
| 1971 | 88° | 56° | 72° | — | — |
55 years of data from ANAHEIM