Weather on April 20
Fullerton, CA
55 Years of Data
Avg High
76°F
Avg Low
52°F
Warmest
2009
84°F avg
Coldest
1971
52°F avg
About This Date
April 20th in Fullerton, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 52°F. Over 55 years of records, the warmest April 20th was in 2009 (84°F average), while the coldest was 1971 (52°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 5% of April 20th dates historically, with the wettest April 20th recording 2.29" of rain. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for April 20th in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 50° | 63° | — | — |
| 2024 | 73° | 58° | 65° | — | — |
| 2023 | 83° | 50° | 66° | — | — |
| 2022 | 74° | 58° | 66° | — | — |
| 2021 | 71° | 57° | 64° | — | — |
| 2020 | 71° | 57° | 64° | — | — |
| 2019 | 72° | 57° | 64° | — | — |
| 2018 | 77° | 51° | 64° | — | — |
| 2017 | 79° | 56° | 67° | — | — |
| 2016 | 90° | 58° | 74° | — | — |
| 2015 | 75° | 58° | 66° | — | — |
| 2014 | 79° | 56° | 67° | — | — |
| 2013 | 85° | 53° | 69° | — | — |
| 2012 | 85° | 56° | 70° | — | — |
| 2011 | 69° | 58° | 63° | — | — |
| 2010 | 74° | 55° | 64° | — | — |
| 2009warmest | 104° | 65° | 84° | — | — |
| 2008 | 68° | 52° | 60° | — | — |
| 2007 | 72° | 52° | 62° | 0.86" | — |
| 2006 | 82° | 52° | 67° | — | — |
| 2005 | 73° | 49° | 61° | — | — |
| 2004 | 72° | 52° | 62° | — | — |
| 2003 | 81° | 53° | 67° | — | — |
| 2002 | 69° | 47° | 58° | — | — |
| 2001 | 67° | 52° | 59° | — | — |
| 2000 | 80° | 49° | 64° | — | — |
| 1999 | 85° | 55° | 70° | — | — |
| 1998 | 86° | 49° | 67° | — | — |
| 1997 | 75° | 58° | 66° | — | — |
| 1996 | 70° | 49° | 59° | — | — |
| 1995 | 62° | 48° | 55° | — | — |
| 1994 | 75° | 56° | 65° | — | — |
| 1993 | 85° | 58° | 71° | — | — |
| 1992 | 84° | 60° | 72° | — | — |
| 1991 | 66° | 54° | 60° | — | — |
| 1990 | 72° | 59° | 65° | — | — |
| 1989 | 76° | 60° | 68° | — | — |
| 1988 | 65° | 51° | 58° | 2.29" | — |
| 1987 | 90° | 49° | 69° | — | — |
| 1986 | 91° | 55° | 73° | — | — |
| 1985 | 66° | 51° | 59° | — | — |
| 1984 | 74° | 51° | 62° | — | — |
| 1983 | 66° | 51° | 59° | 1.57" | — |
| 1982 | 88° | 43° | 65° | — | — |
| 1981 | 71° | 44° | 58° | — | — |
| 1980 | 74° | 50° | 62° | — | — |
| 1979 | 79° | 43° | 61° | — | — |
| 1978 | 70° | 48° | 59° | — | — |
| 1977 | 79° | 43° | 61° | — | — |
| 1976 | 86° | 50° | 68° | — | — |
| 1975 | 75° | 43° | 59° | — | — |
| 1974 | 69° | 42° | 56° | — | — |
| 1973 | 74° | 39° | 56° | — | — |
| 1972 | 71° | 38° | 54° | — | — |
| 1971coldest | 61° | 44° | 52° | — | — |
55 years of data from ANAHEIM