Weather on May 31
Riverside, CA
55 Years of Data
Avg High
84°F
Avg Low
56°F
Warmest
2025
80°F avg
Coldest
1980
61°F avg
About This Date
May 31st in Riverside, CA typically brings warm spring weather, with average highs around 84°F and lows near 56°F — a 28°F daily swing. Over 55 years of records, the warmest May 31st was in 2025 (80°F average), while the coldest was 1980 (61°F) — a 19°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for May 31st in Riverside, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 98° | 62° | 80° | — | — |
| 2024 | 81° | 56° | 68° | — | — |
| 2023 | 66° | 56° | 61° | — | — |
| 2022 | 83° | 55° | 69° | — | — |
| 2021 | 86° | 56° | 71° | — | — |
| 2020 | 87° | 56° | 71° | — | — |
| 2019 | 81° | 56° | 68° | — | — |
| 2018 | 77° | 58° | 67° | — | — |
| 2017 | 74° | 60° | 67° | — | — |
| 2016 | 81° | 57° | 69° | — | — |
| 2015 | 83° | 58° | 70° | — | — |
| 2014 | 91° | 59° | 75° | — | — |
| 2013 | 88° | 61° | 74° | — | — |
| 2012 | 93° | 57° | 75° | — | — |
| 2011 | 84° | 52° | 68° | — | — |
| 2010 | 85° | 56° | 70° | — | — |
| 2009 | 76° | 59° | 67° | — | — |
| 2008 | 81° | 53° | 67° | — | — |
| 2007 | 79° | 51° | 65° | — | — |
| 2006 | 94° | 54° | 74° | — | — |
| 2005 | 84° | 54° | 69° | — | — |
| 2004 | 95° | 55° | 75° | — | — |
| 2003 | 86° | 58° | 72° | — | — |
| 2002 | 88° | 57° | 72° | — | — |
| 2001 | 95° | 57° | 76° | — | — |
| 2000 | 84° | 61° | 72° | — | — |
| 1999 | 80° | 51° | 66° | — | — |
| 1998 | 82° | 50° | 66° | — | — |
| 1997 | 93° | 63° | 78° | — | — |
| 1996 | 85° | 52° | 68° | — | — |
| 1995 | 94° | 58° | 76° | — | — |
| 1994 | 81° | 57° | 69° | — | — |
| 1993 | 82° | 60° | 71° | — | — |
| 1992 | 93° | 60° | 77° | — | — |
| 1991 | 74° | 53° | 63° | — | — |
| 1990 | 76° | 57° | 66° | — | — |
| 1989 | 93° | 53° | 73° | — | — |
| 1988 | 85° | 49° | 67° | — | — |
| 1987 | 92° | 55° | 73° | — | — |
| 1986 | 86° | 55° | 71° | — | — |
| 1985 | 77° | 54° | 65° | — | — |
| 1984 | 89° | 60° | 75° | — | — |
| 1983 | 70° | 59° | 64° | — | — |
| 1982 | 80° | 50° | 65° | — | — |
| 1981 | 87° | 62° | 75° | — | — |
| 1980coldest | 68° | 54° | 61° | — | — |
| 1979 | 80° | 59° | 70° | — | — |
| 1978 | 87° | 57° | 72° | — | — |
| 1977 | 93° | 57° | 75° | — | — |
| 1976 | 85° | 52° | 68° | — | — |
| 1975 | 87° | 56° | 71° | — | — |
| 1974 | 75° | 58° | 66° | — | — |
| 1973 | 77° | 58° | 67° | — | — |
| 1972 | 94° | 61° | 77° | — | — |
| 1971 | 71° | 53° | 62° | — | — |
55 years of data from RIVERSIDE MUNI AP