Weather on May 9
Rialto, CA
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
1993
79°F avg
Coldest
1977
51°F avg
About This Date
May 9th 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 9th was in 1993 (79°F average), while the coldest was 1977 (51°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 6% of May 9th dates historically, with the wettest May 9th recording 2.92" of rain.
Planning for May 9th 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 | 100° | 58° | 79° | — | — |
| 2017 | 69° | 52° | 60° | — | — |
| 2016 | 68° | 53° | 61° | — | — |
| 2015 | 60° | 50° | 55° | — | — |
| 2014 | 71° | 50° | 61° | — | — |
| 2013 | 70° | 47° | 58° | — | — |
| 2012 | 92° | 62° | 77° | — | — |
| 2011 | 58° | 46° | 52° | — | — |
| 2010 | 63° | 48° | 55° | — | — |
| 2009 | 84° | 58° | 71° | — | — |
| 2008 | 60° | 48° | 54° | — | — |
| 2007 | 88° | 63° | 75° | — | — |
| 2006 | 71° | 55° | 63° | — | — |
| 2005 | 61° | 48° | 54° | — | — |
| 2004 | 88° | 55° | 71° | — | — |
| 2003 | 65° | 43° | 54° | — | — |
| 2002 | 82° | 47° | 64° | — | — |
| 2001 | 94° | 63° | 78° | — | — |
| 2000 | 83° | 53° | 68° | — | — |
| 1999 | 65° | 51° | 58° | — | — |
| 1998 | 67° | 54° | 60° | — | — |
| 1997 | 94° | 57° | 75° | — | — |
| 1996 | 80° | 50° | 65° | — | — |
| 1995 | 71° | 43° | 57° | — | — |
| 1994 | 76° | 51° | 63° | — | — |
| 1993warmest | 91° | 66° | 79° | — | — |
| 1992 | 67° | 58° | 62° | — | — |
| 1991 | 64° | 44° | 54° | — | — |
| 1990 | 78° | 51° | 65° | — | — |
| 1989 | 75° | 56° | 65° | — | — |
| 1988 | 82° | 46° | 64° | — | — |
| 1987 | 89° | 60° | 75° | — | — |
| 1986 | 83° | 44° | 63° | — | — |
| 1985 | 70° | 56° | 63° | 0.08" | — |
| 1984 | 99° | 58° | 78° | — | — |
| 1983 | 75° | 56° | 65° | — | — |
| 1982 | 66° | 52° | 59° | 0.18" | — |
| 1981 | 98° | 54° | 76° | — | — |
| 1980 | 69° | 55° | 62° | — | — |
| 1979 | 73° | 41° | 57° | — | — |
| 1978 | 88° | 54° | 71° | — | — |
| 1977coldest | 56° | 47° | 51° | 2.92" | — |
| 1976 | 88° | 53° | 70° | — | — |
| 1975 | 89° | 48° | 69° | — | — |
| 1974 | 72° | 57° | 64° | — | — |
| 1973 | 92° | 53° | 72° | — | — |
| 1972 | 75° | 47° | 61° | — | — |
| 1971 | 76° | 48° | 62° | — | — |
48 years of data from DEVORE CALIFORNIA