Weather on May 8
Rialto, CA
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
2001
84°F avg
Coldest
2015
47°F avg
About This Date
May 8th 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 8th was in 2001 (84°F average), while the coldest was 2015 (47°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 10% of May 8th dates historically, with the wettest May 8th recording 1.68" of rain.
Planning for May 8th in Rialto, CA? Great weather for outdoor activities.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 55° | 72° | — | — |
| 2017 | 75° | 43° | 59° | — | — |
| 2016 | 62° | 51° | 57° | — | — |
| 2015coldest | 52° | 42° | 47° | — | — |
| 2014 | 70° | 49° | 59° | — | — |
| 2013 | 66° | 50° | 58° | — | — |
| 2012 | 87° | 62° | 75° | — | — |
| 2011 | 58° | 49° | 53° | — | — |
| 2010 | 77° | 54° | 65° | — | — |
| 2009 | 89° | 65° | 77° | — | — |
| 2008 | 70° | 49° | 59° | — | — |
| 2007 | 92° | 65° | 78° | — | — |
| 2006 | 76° | 53° | 64° | — | — |
| 2005 | 67° | 47° | 57° | — | — |
| 2004 | 86° | 55° | 71° | — | — |
| 2003 | 60° | 46° | 53° | — | — |
| 2002 | 73° | 50° | 62° | — | — |
| 2001warmest | 99° | 69° | 84° | — | — |
| 2000 | 68° | 54° | 61° | — | — |
| 1999 | 72° | 50° | 61° | — | — |
| 1998 | 65° | 55° | 60° | 0.08" | — |
| 1997 | 87° | 56° | 71° | — | — |
| 1996 | 80° | 50° | 65° | — | — |
| 1995 | 61° | 45° | 53° | — | — |
| 1994 | 68° | 51° | 60° | 0.25" | — |
| 1993 | 85° | 47° | 66° | — | — |
| 1992 | 79° | 56° | 67° | — | — |
| 1991 | 78° | 52° | 65° | — | — |
| 1990 | 79° | 54° | 66° | — | — |
| 1989 | 91° | 55° | 73° | — | — |
| 1988 | 71° | 46° | 59° | — | — |
| 1987 | 95° | 59° | 77° | — | — |
| 1986 | 78° | 44° | 61° | — | — |
| 1985 | 76° | 53° | 64° | — | — |
| 1984 | 101° | 51° | 76° | — | — |
| 1983 | 79° | 50° | 64° | — | — |
| 1982 | 77° | 54° | 65° | — | — |
| 1981 | 89° | 52° | 70° | — | — |
| 1980 | 67° | 57° | 62° | — | — |
| 1979 | 60° | 48° | 54° | 1.17" | — |
| 1978 | 89° | 51° | 70° | — | — |
| 1977 | 62° | 51° | 57° | 1.68" | — |
| 1976 | 80° | 52° | 66° | — | — |
| 1975 | 81° | 45° | 63° | — | — |
| 1974 | 81° | 57° | 69° | — | — |
| 1973 | 86° | 47° | 66° | — | — |
| 1972 | 76° | 51° | 63° | — | — |
| 1971 | 68° | 47° | 57° | 0.18" | — |
48 years of data from DEVORE CALIFORNIA