Weather on May 20
Riverside, CA
55 Years of Data
Avg High
81°F
Avg Low
54°F
Warmest
1988
79°F avg
Coldest
1972
56°F avg
About This Date
May 20th in Riverside, CA typically brings warm spring weather, with average highs around 81°F and lows near 54°F — a 27°F daily swing. Over 55 years of records, the warmest May 20th was in 1988 (79°F average), while the coldest was 1972 (56°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 7% of May 20th dates historically. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in Riverside, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 59° | 76° | — | — |
| 2024 | 73° | 54° | 63° | — | — |
| 2023 | 86° | 60° | 73° | — | — |
| 2022 | 68° | 56° | 62° | — | — |
| 2021 | 73° | 56° | 64° | — | — |
| 2020 | 80° | 51° | 66° | — | — |
| 2019 | 70° | 50° | 60° | — | — |
| 2018 | 73° | 59° | 66° | — | — |
| 2017 | 97° | 56° | 76° | — | — |
| 2016 | 75° | 57° | 66° | — | — |
| 2015 | 75° | 56° | 65° | — | — |
| 2014 | 74° | 56° | 65° | — | — |
| 2013 | 95° | 58° | 76° | — | — |
| 2012 | 97° | 57° | 77° | — | — |
| 2011 | 75° | 52° | 63° | — | — |
| 2010 | 85° | 54° | 69° | — | — |
| 2009 | 90° | 58° | 74° | — | — |
| 2008 | 80° | 61° | 70° | — | — |
| 2007 | 76° | 53° | 64° | — | — |
| 2006 | 83° | 59° | 71° | — | — |
| 2005 | 92° | 58° | 75° | — | — |
| 2004 | 76° | 56° | 66° | — | — |
| 2003 | 97° | 54° | 75° | — | — |
| 2002 | 67° | 52° | 59° | — | — |
| 2001 | 81° | 53° | 67° | — | — |
| 2000 | 98° | 56° | 77° | — | — |
| 1999 | 75° | 55° | 65° | — | — |
| 1998 | 78° | 51° | 65° | — | — |
| 1997 | 81° | 62° | 71° | — | — |
| 1996 | 82° | 55° | 69° | — | — |
| 1995 | 78° | 59° | 69° | — | — |
| 1994 | 79° | 49° | 64° | — | — |
| 1993 | 79° | 61° | 70° | — | — |
| 1992 | 76° | 59° | 67° | — | — |
| 1991 | 77° | 48° | 63° | — | — |
| 1990 | 78° | 55° | 67° | — | — |
| 1989 | 80° | 34° | 57° | — | — |
| 1988warmest | 100° | 57° | 79° | — | — |
| 1987 | 69° | 56° | 62° | — | — |
| 1986 | 89° | 52° | 70° | — | — |
| 1985 | 81° | 54° | 67° | — | — |
| 1984 | 89° | 51° | 70° | — | — |
| 1983 | 95° | 54° | 74° | — | — |
| 1982 | 81° | 52° | 66° | — | — |
| 1981 | 72° | 51° | 61° | 0.03" | — |
| 1980 | 85° | 55° | 70° | — | — |
| 1979 | 77° | 56° | 66° | 0.05" | — |
| 1978 | 91° | 56° | 73° | — | — |
| 1977 | 86° | 48° | 67° | — | — |
| 1976 | 81° | 54° | 67° | — | — |
| 1975 | 65° | 51° | 58° | 0.1" | — |
| 1974 | 81° | 43° | 62° | — | — |
| 1973 | 72° | 57° | 64° | — | — |
| 1972coldest | 67° | 46° | 56° | 0.05" | — |
| 1971 | 84° | 48° | 66° | — | — |
55 years of data from RIVERSIDE MUNI AP