Weather on May 1
Rialto, CA
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
2014
76°F avg
Coldest
1991
52°F avg
About This Date
May 1st in Rialto, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 52°F — a 25°F daily swing. Over 48 years of records, the warmest May 1st was in 2014 (76°F average), while the coldest was 1991 (52°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 8% of May 1st dates historically.
Planning for May 1st in Rialto, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 54° | 64° | — | — |
| 2017 | 88° | 59° | 73° | — | — |
| 2016 | 71° | 48° | 60° | — | — |
| 2015 | 87° | 62° | 75° | — | — |
| 2014warmest | 85° | 67° | 76° | — | — |
| 2013 | 86° | 52° | 69° | — | — |
| 2012 | 59° | 52° | 55° | — | — |
| 2011 | 73° | 54° | 63° | — | — |
| 2010 | 72° | 47° | 59° | — | — |
| 2009 | 76° | 53° | 64° | — | — |
| 2008 | 75° | 46° | 61° | — | — |
| 2007 | 74° | 52° | 63° | — | — |
| 2006 | 79° | 53° | 66° | — | — |
| 2005 | 69° | 48° | 59° | — | — |
| 2004 | 90° | 54° | 72° | — | — |
| 2003 | 70° | 44° | 57° | — | — |
| 2002 | 64° | 40° | 52° | — | — |
| 2001 | 85° | 54° | 69° | — | — |
| 2000 | 90° | 57° | 73° | — | — |
| 1999 | 69° | 40° | 54° | — | — |
| 1998 | 72° | 52° | 62° | — | — |
| 1997 | 81° | 49° | 65° | — | — |
| 1996 | 91° | 59° | 75° | — | — |
| 1995 | 76° | 54° | 65° | — | — |
| 1994 | 70° | 53° | 61° | — | — |
| 1993 | 88° | 54° | 71° | — | — |
| 1992 | 78° | 52° | 65° | — | — |
| 1991coldest | 59° | 45° | 52° | — | — |
| 1990 | 78° | 45° | 61° | — | — |
| 1989 | 82° | 51° | 67° | — | — |
| 1988 | 70° | 45° | 57° | — | — |
| 1987 | 72° | 56° | 64° | — | — |
| 1986 | 80° | 54° | 67° | — | — |
| 1985 | 92° | 55° | 73° | — | — |
| 1984 | 72° | 48° | 60° | — | — |
| 1983 | 65° | 47° | 56° | 0.13" | — |
| 1982 | 81° | 59° | 70° | — | — |
| 1981 | 88° | 57° | 72° | — | — |
| 1980 | 66° | 53° | 60° | 0.05" | — |
| 1979 | 71° | 54° | 62° | 0.05" | — |
| 1978 | 69° | 51° | 60° | 0.08" | — |
| 1977 | 75° | 56° | 65° | — | — |
| 1976 | 96° | 53° | 75° | — | — |
| 1975 | 72° | 53° | 62° | — | — |
| 1974 | 85° | 51° | 68° | — | — |
| 1973 | 77° | 46° | 62° | — | — |
| 1972 | 87° | 51° | 69° | — | — |
| 1971 | 78° | 49° | 63° | — | — |
48 years of data from DEVORE CALIFORNIA