Weather on April 21
Irvine, CA
55 Years of Data
Avg High
76°F
Avg Low
50°F
Warmest
2009
83°F avg
Coldest
1980
53°F avg
About This Date
April 21st in Irvine, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 50°F — a 26°F daily swing. Over 55 years of records, the warmest April 21st was in 2009 (83°F average), while the coldest was 1980 (53°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 21st dates historically, with the wettest April 21st recording 2.87" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Irvine, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 48° | 62° | — | — |
| 2024 | 73° | 55° | 64° | — | — |
| 2023 | 89° | 53° | 71° | — | — |
| 2022 | 70° | 49° | 59° | — | — |
| 2021 | 70° | 56° | 63° | — | — |
| 2020 | 75° | 45° | 60° | — | — |
| 2019 | 77° | 50° | 64° | — | — |
| 2018 | 85° | 50° | 67° | — | — |
| 2017 | 90° | 52° | 71° | — | — |
| 2016 | 88° | 55° | 71° | — | — |
| 2015 | 70° | 53° | 61° | — | — |
| 2014 | 83° | 54° | 68° | — | — |
| 2013 | 81° | 46° | 63° | — | — |
| 2012 | 80° | 63° | 71° | — | — |
| 2011 | 74° | 52° | 63° | — | — |
| 2010 | 63° | 44° | 53° | — | — |
| 2009warmest | 100° | 66° | 83° | — | — |
| 2008 | 72° | 46° | 59° | — | — |
| 2007 | 64° | 43° | 53° | — | — |
| 2006 | 77° | 52° | 64° | — | — |
| 2005 | 82° | 47° | 64° | — | — |
| 2004 | 75° | 50° | 63° | — | — |
| 2003 | 69° | 46° | 58° | — | — |
| 2002 | 77° | 44° | 61° | — | — |
| 2001 | 58° | 48° | 53° | 1.32" | — |
| 2000 | 73° | 53° | 63° | — | — |
| 1999 | 72° | 58° | 65° | — | — |
| 1998 | 92° | 53° | 72° | — | — |
| 1997 | 83° | 56° | 69° | — | — |
| 1996 | 78° | 48° | 63° | — | — |
| 1995 | 70° | 42° | 56° | — | — |
| 1994 | 67° | 57° | 62° | — | — |
| 1993 | 87° | 47° | 67° | — | — |
| 1992 | 80° | 50° | 65° | — | — |
| 1991 | 69° | 54° | 61° | — | — |
| 1990 | 71° | 56° | 63° | — | — |
| 1989 | 76° | 59° | 67° | — | — |
| 1988 | 62° | 47° | 54° | 0.23" | — |
| 1987 | 91° | 52° | 71° | — | — |
| 1986 | 90° | 51° | 70° | — | — |
| 1985 | 64° | 50° | 57° | — | — |
| 1984 | 84° | 44° | 64° | — | — |
| 1983 | 63° | 53° | 58° | 2.87" | — |
| 1982 | 85° | 43° | 64° | — | — |
| 1981 | 80° | 48° | 64° | — | — |
| 1980coldest | 64° | 41° | 53° | 0.28" | — |
| 1979 | 79° | 43° | 61° | — | — |
| 1978 | 71° | 53° | 62° | — | — |
| 1977 | 78° | 43° | 60° | — | — |
| 1976 | 84° | 47° | 65° | — | — |
| 1975 | 72° | 49° | 60° | — | — |
| 1974 | 69° | 45° | 57° | — | — |
| 1973 | 71° | 41° | 56° | — | — |
| 1972 | 75° | 38° | 56° | — | — |
| 1971 | 62° | 47° | 54° | 0.13" | — |
55 years of data from IRVINE RCH