Weather on April 20
Riverside, CA
55 Years of Data
Avg High
78°F
Avg Low
49°F
Warmest
2009
78°F avg
Coldest
2007
49°F avg
About This Date
April 20th in Riverside, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 49°F — a 29°F daily swing. Over 55 years of records, the warmest April 20th was in 2009 (78°F average), while the coldest was 2007 (49°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 9% of April 20th dates historically, with the wettest April 20th recording 2.31" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for April 20th in Riverside, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 48° | 64° | — | — |
| 2024 | 75° | 51° | 63° | — | — |
| 2023 | 86° | 45° | 65° | — | — |
| 2022 | 73° | 53° | 63° | — | — |
| 2021 | 80° | 52° | 66° | — | — |
| 2020 | 68° | 54° | 61° | — | — |
| 2019 | 68° | 54° | 61° | — | — |
| 2018 | 80° | 45° | 62° | — | — |
| 2017 | 82° | 51° | 67° | — | — |
| 2016 | 91° | 55° | 73° | — | — |
| 2015 | 78° | 52° | 65° | — | — |
| 2014 | 85° | 54° | 69° | — | — |
| 2013 | 93° | 51° | 72° | — | — |
| 2012 | 99° | 56° | 77° | — | — |
| 2011 | 70° | 58° | 64° | — | — |
| 2010 | 72° | 50° | 61° | 0.13" | — |
| 2009warmest | 101° | 56° | 78° | — | — |
| 2008 | 60° | 48° | 54° | — | — |
| 2007coldest | 53° | 45° | 49° | 1.17" | — |
| 2006 | 83° | 45° | 64° | — | — |
| 2005 | 73° | 44° | 59° | — | — |
| 2004 | 73° | 45° | 59° | — | — |
| 2003 | 78° | 46° | 62° | — | — |
| 2002 | 72° | 40° | 56° | — | — |
| 2001 | 65° | 41° | 53° | — | — |
| 2000 | 83° | 47° | 65° | — | — |
| 1999 | 82° | 50° | 66° | — | — |
| 1998 | 92° | 47° | 69° | — | — |
| 1997 | 85° | 55° | 70° | — | — |
| 1996 | 76° | 47° | 61° | — | — |
| 1995 | 61° | 42° | 51° | 0.03" | — |
| 1994 | 82° | 55° | 69° | — | — |
| 1993 | 91° | 50° | 71° | — | — |
| 1992 | 87° | 52° | 69° | — | — |
| 1991 | 72° | 49° | 60° | — | — |
| 1990 | 73° | 56° | 64° | — | — |
| 1989 | 90° | 55° | 72° | — | — |
| 1988 | 69° | 50° | 60° | 2.31" | — |
| 1987 | 86° | 49° | 67° | — | — |
| 1986 | 93° | 45° | 69° | — | — |
| 1985 | 67° | 51° | 59° | — | — |
| 1984 | 75° | 41° | 58° | — | — |
| 1983 | 65° | 52° | 58° | 2.11" | — |
| 1982 | 83° | 50° | 66° | — | — |
| 1981 | 70° | 47° | 58° | — | — |
| 1980 | 82° | 51° | 67° | — | — |
| 1979 | 81° | 53° | 67° | — | — |
| 1978 | 72° | 48° | 60° | — | — |
| 1977 | 84° | 45° | 64° | — | — |
| 1976 | 89° | 47° | 68° | — | — |
| 1975 | 83° | 42° | 62° | — | — |
| 1974 | 71° | 44° | 58° | — | — |
| 1973 | 72° | 40° | 56° | — | — |
| 1972 | 75° | 36° | 55° | — | — |
| 1971 | 63° | 47° | 55° | — | — |
55 years of data from RIVERSIDE MUNI AP