Weather on May 17
Rialto, CA
55 Years of Data
Avg High
80°F
Avg Low
53°F
Warmest
2008
85°F avg
Coldest
2011
50°F avg
About This Date
May 17th in Rialto, CA typically brings warm spring weather, with average highs around 80°F and lows near 53°F — a 27°F daily swing. Over 48 years of records, the warmest May 17th was in 2008 (85°F average), while the coldest was 2011 (50°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 17th dates historically.
Planning for May 17th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 54° | 64° | — | — |
| 2017 | 56° | 48° | 52° | — | — |
| 2016 | 77° | 56° | 66° | — | — |
| 2015 | 69° | 52° | 60° | — | — |
| 2014 | 88° | 62° | 75° | — | — |
| 2013 | 64° | 55° | 60° | — | — |
| 2012 | 85° | 57° | 71° | — | — |
| 2011coldest | 57° | 43° | 50° | — | — |
| 2010 | 63° | 50° | 56° | — | — |
| 2009 | 95° | 69° | 82° | — | — |
| 2008warmest | 100° | 70° | 85° | — | — |
| 2007 | 80° | 50° | 65° | — | — |
| 2006 | 90° | 56° | 73° | — | — |
| 2005 | 73° | 52° | 62° | — | — |
| 2004 | 72° | 55° | 63° | — | — |
| 2003 | 81° | 53° | 67° | — | — |
| 2002 | 84° | 49° | 66° | — | — |
| 2001 | 85° | 53° | 69° | — | — |
| 2000 | 74° | 45° | 59° | — | — |
| 1999 | 90° | 53° | 71° | — | — |
| 1998 | 76° | 48° | 62° | — | — |
| 1997 | 95° | 60° | 78° | — | — |
| 1996 | 82° | 55° | 69° | — | — |
| 1995 | 70° | 49° | 59° | — | — |
| 1994 | 58° | 52° | 55° | 0.03" | — |
| 1993 | 78° | 52° | 65° | — | — |
| 1992 | 82° | 52° | 67° | — | — |
| 1991 | 64° | 49° | 56° | — | — |
| 1990 | 77° | 48° | 63° | — | — |
| 1989 | 70° | 53° | 61° | 0.13" | — |
| 1988 | 68° | 57° | 63° | — | — |
| 1987 | 80° | 60° | 70° | — | — |
| 1986 | 95° | 53° | 74° | — | — |
| 1985 | 77° | 54° | 65° | — | — |
| 1984 | 87° | 54° | 70° | — | — |
| 1983 | 87° | 53° | 70° | — | — |
| 1982 | 94° | 58° | 76° | — | — |
| 1981 | 88° | 46° | 67° | — | — |
| 1980 | 85° | 52° | 68° | — | — |
| 1979 | 88° | 53° | 70° | — | — |
| 1978 | 88° | 63° | 75° | — | — |
| 1977 | 72° | 45° | 58° | — | — |
| 1976 | 92° | 50° | 71° | — | — |
| 1975 | 85° | 54° | 69° | — | — |
| 1974 | 72° | 53° | 62° | — | — |
| 1973 | 88° | 55° | 71° | — | — |
| 1972 | 77° | 43° | 60° | — | — |
| 1971 | 84° | 54° | 69° | — | — |
48 years of data from DEVORE CALIFORNIA