Weather on June 15
Rialto, CA
55 Years of Data
Avg High
87°F
Avg Low
58°F
Warmest
2025
82°F avg
Coldest
1992
51°F avg
About This Date
June 15th in Rialto, CA typically brings warm summer weather, with average highs around 87°F and lows near 58°F — a 29°F daily swing. Over 48 years of records, the warmest June 15th was in 2025 (82°F average), while the coldest was 1992 (51°F) — a 31°F range across recorded history. This date has historically been dry, with little recorded precipitation.
Planning for June 15th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 100° | 63° | 82° | — | — |
| 2017 | 93° | 65° | 79° | — | — |
| 2016 | 73° | 56° | 64° | — | — |
| 2015 | 94° | 61° | 77° | — | — |
| 2014 | 80° | 57° | 69° | — | — |
| 2013 | 81° | 52° | 66° | — | — |
| 2012 | 77° | 54° | 65° | — | — |
| 2011 | 84° | 58° | 71° | — | — |
| 2010 | 87° | 60° | 74° | — | — |
| 2009 | 65° | 53° | 59° | — | — |
| 2008 | 93° | 68° | 81° | — | — |
| 2007 | 90° | 63° | 76° | — | — |
| 2006 | 82° | 59° | 71° | — | — |
| 2005 | 85° | 58° | 71° | — | — |
| 2004 | 88° | 55° | 71° | — | — |
| 2003 | 92° | 58° | 75° | — | — |
| 2002 | 95° | 59° | 77° | — | — |
| 2001 | 98° | 64° | 81° | — | — |
| 2000 | 95° | 60° | 78° | — | — |
| 1999 | 95° | 61° | 78° | — | — |
| 1998 | 86° | 57° | 72° | — | — |
| 1997 | 81° | 51° | 66° | — | — |
| 1996 | 87° | 55° | 71° | — | — |
| 1995 | 60° | 52° | 56° | — | — |
| 1994 | 76° | 60° | 68° | — | — |
| 1993 | 69° | 69° | 69° | — | — |
| 1992coldest | 53° | 48° | 51° | — | — |
| 1991 | 82° | 51° | 67° | — | — |
| 1990 | 74° | 54° | 64° | — | — |
| 1989 | 92° | 61° | 76° | — | — |
| 1988 | 90° | 58° | 74° | — | — |
| 1987 | 82° | 53° | 68° | — | — |
| 1986 | 89° | 57° | 73° | — | — |
| 1985 | 99° | 59° | 79° | — | — |
| 1984 | 80° | 57° | 69° | — | — |
| 1983 | 88° | 54° | 71° | — | — |
| 1982 | 86° | 56° | 71° | — | — |
| 1981 | 98° | 64° | 81° | — | — |
| 1980 | 97° | 51° | 74° | — | — |
| 1979 | 94° | 63° | 78° | — | — |
| 1978 | 92° | 56° | 74° | — | — |
| 1977 | 99° | 52° | 75° | — | — |
| 1976 | 103° | 58° | 80° | — | — |
| 1975 | 89° | 54° | 71° | — | — |
| 1974 | 102° | 61° | 81° | — | — |
| 1973 | 78° | 54° | 66° | — | — |
| 1972 | 93° | 57° | 75° | — | — |
| 1971 | 104° | 58° | 81° | — | — |
48 years of data from DEVORE CALIFORNIA