Weather on August 26
Rialto, CA
55 Years of Data
Avg High
94°F
Avg Low
65°F
Warmest
2010
90°F avg
Coldest
1973
69°F avg
About This Date
August 26th in Rialto, CA typically brings hot summer weather, with average highs around 94°F and lows near 65°F — a 29°F daily swing. Over 48 years of records, the warmest August 26th was in 2010 (90°F average), while the coldest was 1973 (69°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation.
Planning for August 26th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 73° | 85° | — | — |
| 2017 | 100° | 68° | 84° | — | — |
| 2016 | 82° | 57° | 70° | — | — |
| 2015 | 95° | 74° | 84° | — | — |
| 2014 | 88° | 66° | 77° | — | — |
| 2013 | 86° | 71° | 79° | — | — |
| 2012 | 88° | 58° | 73° | — | — |
| 2011 | 103° | 78° | 90° | — | — |
| 2010warmest | 103° | 77° | 90° | — | — |
| 2009 | 98° | 67° | 82° | — | — |
| 2008 | 92° | 69° | 80° | — | — |
| 2007 | 87° | 67° | 77° | — | — |
| 2006 | 88° | 61° | 74° | — | — |
| 2005 | 100° | 72° | 86° | — | — |
| 2004 | 86° | 59° | 73° | — | — |
| 2003 | 97° | 72° | 84° | — | — |
| 2002 | 95° | 65° | 80° | — | — |
| 2001 | 102° | 70° | 86° | — | — |
| 2000 | 94° | 66° | 80° | — | — |
| 1999 | 105° | 72° | 88° | — | — |
| 1998 | 94° | 62° | 78° | — | — |
| 1997 | 97° | 64° | 80° | — | — |
| 1996 | 99° | 65° | 82° | — | — |
| 1995 | 96° | 64° | 80° | — | — |
| 1994 | 96° | 58° | 77° | — | — |
| 1993 | 94° | 69° | 81° | — | — |
| 1992 | 92° | 63° | 77° | — | — |
| 1991 | 88° | 62° | 75° | — | — |
| 1990 | 84° | 56° | 70° | — | — |
| 1989 | 90° | 60° | 75° | — | — |
| 1988 | 96° | 71° | 84° | — | — |
| 1987 | 89° | 55° | 72° | — | — |
| 1986 | 97° | 69° | 83° | — | — |
| 1985 | 102° | 72° | 87° | — | — |
| 1984 | 98° | 68° | 83° | — | — |
| 1983 | 103° | 61° | 82° | — | — |
| 1982 | 97° | 68° | 82° | — | — |
| 1981 | 109° | 69° | 89° | — | — |
| 1980 | 100° | 61° | 80° | — | — |
| 1979 | 91° | 62° | 77° | — | — |
| 1978 | 82° | 66° | 74° | — | — |
| 1977 | 85° | 61° | 73° | — | — |
| 1976 | 99° | 62° | 80° | — | — |
| 1975 | 93° | 55° | 74° | — | — |
| 1974 | 99° | 60° | 79° | — | — |
| 1973coldest | 80° | 57° | 69° | — | — |
| 1972 | 87° | 59° | 73° | — | — |
| 1971 | 104° | 62° | 83° | — | — |
48 years of data from FONTANA 5 N