Weather on August 12
Rialto, CA
55 Years of Data
Avg High
95°F
Avg Low
65°F
Warmest
1996
89°F avg
Coldest
2011
70°F avg
About This Date
August 12th in Rialto, CA typically brings hot summer weather, with average highs around 95°F and lows near 65°F — a 30°F daily swing. Over 48 years of records, the warmest August 12th was in 1996 (89°F average), while the coldest was 2011 (70°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 12th dates historically.
Planning for August 12th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 99° | 66° | 82° | — | — |
| 2017 | 95° | 68° | 82° | — | — |
| 2016 | 92° | 64° | 78° | — | — |
| 2015 | 98° | 62° | 80° | — | — |
| 2014 | 92° | 67° | 79° | — | — |
| 2013 | 89° | 59° | 74° | — | — |
| 2012 | 103° | 76° | 89° | — | — |
| 2011coldest | 88° | 53° | 70° | — | — |
| 2010 | 87° | 57° | 72° | — | — |
| 2009 | 93° | 66° | 80° | — | — |
| 2008 | 93° | 65° | 79° | — | — |
| 2007 | 97° | 65° | 81° | — | — |
| 2006 | 88° | 59° | 73° | — | — |
| 2005 | 90° | 60° | 75° | — | — |
| 2004 | 96° | 71° | 84° | — | — |
| 2003 | 103° | 70° | 86° | — | — |
| 2002 | 83° | 67° | 75° | — | — |
| 2001 | 96° | 62° | 79° | — | — |
| 2000 | 102° | 70° | 86° | — | — |
| 1999 | 93° | 56° | 74° | — | — |
| 1998 | 103° | 70° | 86° | — | — |
| 1997 | 89° | 54° | 71° | — | — |
| 1996warmest | 109° | 69° | 89° | — | — |
| 1995 | 99° | 69° | 84° | — | — |
| 1994 | 106° | 70° | 88° | — | — |
| 1993 | 86° | 57° | 72° | — | — |
| 1992 | 101° | 72° | 86° | — | — |
| 1991 | 90° | 69° | 79° | — | — |
| 1990 | 98° | 73° | 86° | — | — |
| 1989 | 94° | 68° | 81° | — | — |
| 1988 | 85° | 59° | 72° | — | — |
| 1987 | 89° | 64° | 77° | — | — |
| 1986 | 96° | 66° | 81° | — | — |
| 1985 | 85° | 60° | 72° | — | — |
| 1984 | 98° | 68° | 83° | — | — |
| 1983 | 101° | 67° | 84° | — | — |
| 1982 | 91° | 62° | 77° | — | — |
| 1981 | 99° | 64° | 81° | — | — |
| 1980 | 105° | 71° | 88° | — | — |
| 1979 | 83° | 64° | 73° | — | — |
| 1978 | 86° | 73° | 80° | — | — |
| 1977 | 101° | 65° | 83° | — | — |
| 1976 | 97° | 57° | 77° | — | — |
| 1975 | 94° | 59° | 76° | — | — |
| 1974 | 88° | 63° | 75° | — | — |
| 1973 | 100° | 63° | 81° | — | — |
| 1972 | 90° | 66° | 78° | 0.38" | — |
| 1971 | 99° | 66° | 82° | — | — |
48 years of data from FONTANA 5 N