Weather on August 22
Rialto, CA
55 Years of Data
Avg High
94°F
Avg Low
64°F
Warmest
1982
90°F avg
Coldest
1989
70°F avg
About This Date
August 22nd in Rialto, CA typically brings hot summer weather, with average highs around 94°F and lows near 64°F — a 30°F daily swing. Over 48 years of records, the warmest August 22nd was in 1982 (90°F average), while the coldest was 1989 (70°F) — a 20°F range across recorded history. This date has historically been dry, with little recorded precipitation.
Planning for August 22nd in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 106° | 74° | 90° | — | — |
| 2017 | 94° | 67° | 80° | — | — |
| 2016 | 90° | 67° | 78° | — | — |
| 2015 | 89° | 61° | 75° | — | — |
| 2014 | 85° | 65° | 75° | — | — |
| 2013 | 96° | 72° | 84° | — | — |
| 2012 | 87° | 66° | 77° | — | — |
| 2011 | 91° | 62° | 77° | — | — |
| 2010 | 95° | 68° | 82° | — | — |
| 2009 | 90° | 68° | 79° | — | — |
| 2008 | 88° | 62° | 75° | — | — |
| 2007 | 91° | 66° | 79° | — | — |
| 2006 | 101° | 69° | 85° | — | — |
| 2005 | 100° | 67° | 83° | — | — |
| 2004 | 86° | 54° | 70° | — | — |
| 2003 | 90° | 60° | 75° | — | — |
| 2002 | 87° | 54° | 70° | — | — |
| 2001 | 86° | 54° | 70° | — | — |
| 2000 | 91° | 57° | 74° | — | — |
| 1999 | 99° | 70° | 84° | — | — |
| 1998 | 105° | 71° | 88° | — | — |
| 1997 | 103° | 70° | 86° | — | — |
| 1996 | 104° | 67° | 85° | — | — |
| 1995 | 99° | 70° | 84° | — | — |
| 1994 | 91° | 58° | 74° | — | — |
| 1993 | 95° | 61° | 78° | — | — |
| 1992 | 85° | 61° | 73° | — | — |
| 1991 | 97° | 71° | 84° | — | — |
| 1990 | 89° | 57° | 73° | — | — |
| 1989coldest | 85° | 55° | 70° | — | — |
| 1988 | 91° | 67° | 79° | — | — |
| 1987 | 93° | 59° | 76° | — | — |
| 1986 | 98° | 68° | 83° | — | — |
| 1985 | 96° | 61° | 78° | — | — |
| 1984 | 97° | 70° | 83° | — | — |
| 1983 | 85° | 64° | 74° | — | — |
| 1982warmest | 104° | 75° | 90° | — | — |
| 1981 | 103° | 65° | 84° | — | — |
| 1980 | 90° | 60° | 75° | — | — |
| 1979 | 98° | 58° | 78° | — | — |
| 1978 | 88° | 68° | 78° | — | — |
| 1977 | 90° | 66° | 78° | — | — |
| 1976 | 90° | 61° | 75° | — | — |
| 1975 | 97° | 55° | 76° | — | — |
| 1974 | 95° | 59° | 77° | — | — |
| 1973 | 98° | 63° | 80° | — | — |
| 1972 | 106° | 62° | 84° | — | — |
| 1971 | 93° | 63° | 78° | — | — |
48 years of data from FONTANA 5 N