Weather on April 21
Riverside, CA
55 Years of Data
Avg High
77°F
Avg Low
50°F
Warmest
2009
82°F avg
Coldest
1971
53°F avg
About This Date
April 21st in Riverside, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 50°F — a 27°F daily swing. Over 55 years of records, the warmest April 21st was in 2009 (82°F average), while the coldest was 1971 (53°F) — a 29°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 0.58" of rain. The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Riverside, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 50° | 64° | — | — |
| 2024 | 84° | 52° | 68° | — | — |
| 2023 | 91° | 53° | 72° | — | — |
| 2022 | 73° | 47° | 60° | — | — |
| 2021 | 68° | 55° | 62° | — | — |
| 2020 | 74° | 53° | 63° | — | — |
| 2019 | 72° | 53° | 62° | — | — |
| 2018 | 91° | 49° | 70° | — | — |
| 2017 | 95° | 55° | 75° | — | — |
| 2016 | 86° | 54° | 70° | — | — |
| 2015 | 67° | 55° | 61° | — | — |
| 2014 | 89° | 61° | 75° | — | — |
| 2013 | 88° | 54° | 71° | — | — |
| 2012 | 93° | 56° | 74° | — | — |
| 2011 | 71° | 55° | 63° | — | — |
| 2010 | 61° | 46° | 53° | 0.15" | — |
| 2009warmest | 103° | 62° | 82° | — | — |
| 2008 | 69° | 48° | 59° | — | — |
| 2007 | 65° | 43° | 54° | — | — |
| 2006 | 79° | 54° | 66° | — | — |
| 2005 | 81° | 46° | 63° | — | — |
| 2004 | 75° | 49° | 62° | — | — |
| 2003 | 67° | 50° | 58° | — | — |
| 2002 | 84° | 43° | 63° | — | — |
| 2001 | 61° | 46° | 53° | 0.58" | — |
| 2000 | 69° | 51° | 60° | — | — |
| 1999 | 70° | 54° | 62° | — | — |
| 1998 | 97° | 55° | 76° | — | — |
| 1997 | 89° | 55° | 72° | — | — |
| 1996 | 75° | 45° | 60° | — | — |
| 1995 | 68° | 44° | 56° | — | — |
| 1994 | 72° | 57° | 64° | — | — |
| 1993 | 87° | 53° | 70° | — | — |
| 1992 | 82° | 53° | 68° | — | — |
| 1991 | 67° | 52° | 59° | 0.05" | — |
| 1990 | 76° | 55° | 65° | — | — |
| 1989 | 79° | 54° | 66° | — | — |
| 1988 | 62° | 47° | 54° | 0.15" | — |
| 1987 | 93° | 48° | 71° | — | — |
| 1986 | 86° | 51° | 69° | — | — |
| 1985 | 59° | 50° | 55° | — | — |
| 1984 | 81° | 54° | 67° | — | — |
| 1983 | 65° | 51° | 58° | 0.23" | — |
| 1982 | 74° | 49° | 61° | — | — |
| 1981 | 79° | 48° | 63° | — | — |
| 1980 | 68° | 50° | 59° | — | — |
| 1979 | 83° | 45° | 64° | — | — |
| 1978 | 69° | 47° | 58° | — | — |
| 1977 | 85° | 44° | 64° | — | — |
| 1976 | 89° | 51° | 70° | — | — |
| 1975 | 84° | 47° | 65° | — | — |
| 1974 | 71° | 45° | 58° | — | — |
| 1973 | 72° | 42° | 57° | — | — |
| 1972 | 75° | 43° | 59° | — | — |
| 1971coldest | 60° | 47° | 53° | — | — |
55 years of data from RIVERSIDE CITRUS EXP