Weather on May 27
Rialto, CA
55 Years of Data
Avg High
80°F
Avg Low
54°F
Warmest
1997
82°F avg
Coldest
1991
56°F avg
About This Date
May 27th in Rialto, CA typically brings warm spring weather, with average highs around 80°F and lows near 54°F — a 26°F daily swing. Over 48 years of records, the warmest May 27th was in 1997 (82°F average), while the coldest was 1991 (56°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 6% of May 27th dates historically.
Planning for May 27th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 58° | 71° | — | — |
| 2017 | 74° | 52° | 63° | — | — |
| 2016 | 80° | 51° | 66° | — | — |
| 2015 | 76° | 54° | 65° | — | — |
| 2014 | 90° | 60° | 75° | — | — |
| 2013 | 77° | 51° | 64° | — | — |
| 2012 | 75° | 46° | 61° | — | — |
| 2011 | 78° | 51° | 65° | — | — |
| 2010 | 63° | 53° | 58° | — | — |
| 2009 | 83° | 52° | 67° | — | — |
| 2008 | 67° | 46° | 56° | — | — |
| 2007 | 81° | 51° | 66° | — | — |
| 2006 | 66° | 50° | 58° | — | — |
| 2005 | 83° | 55° | 69° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 103° | 58° | 80° | — | — |
| 2002 | 80° | 48° | 64° | — | — |
| 2001 | 65° | 57° | 61° | — | — |
| 2000 | 99° | 64° | 81° | — | — |
| 1999 | 88° | 55° | 71° | — | — |
| 1998 | 73° | 43° | 58° | — | — |
| 1997warmest | 95° | 69° | 82° | — | — |
| 1996 | 69° | 49° | 59° | — | — |
| 1995 | 76° | 53° | 64° | — | — |
| 1994 | 82° | 52° | 67° | — | — |
| 1993 | 67° | 48° | 57° | — | — |
| 1992 | 60° | 56° | 58° | — | — |
| 1991coldest | 66° | 47° | 56° | — | — |
| 1990 | 77° | 51° | 64° | — | — |
| 1989 | 86° | 54° | 70° | — | — |
| 1988 | 77° | 55° | 66° | — | — |
| 1987 | 63° | 53° | 58° | — | — |
| 1986 | 89° | 57° | 73° | — | — |
| 1985 | 78° | 54° | 66° | — | — |
| 1984 | 99° | 62° | 80° | — | — |
| 1983 | 100° | 60° | 80° | — | — |
| 1982 | 68° | 57° | 63° | 0.03" | — |
| 1981 | 79° | 61° | 70° | 0.28" | — |
| 1980 | 69° | 52° | 60° | — | — |
| 1979 | 82° | 61° | 71° | — | — |
| 1978 | 89° | 50° | 70° | — | — |
| 1977 | 82° | 50° | 66° | — | — |
| 1976 | 87° | 55° | 71° | — | — |
| 1975 | 85° | 55° | 70° | — | — |
| 1974 | 92° | 59° | 75° | — | — |
| 1973 | 101° | 51° | 76° | — | — |
| 1972 | 90° | 51° | 70° | — | — |
| 1971 | 68° | 49° | 58° | 0.18" | — |
48 years of data from DEVORE CALIFORNIA