Weather on August 13
Rialto, CA
55 Years of Data
Avg High
94°F
Avg Low
65°F
Warmest
1996
92°F avg
Coldest
1993
68°F avg
About This Date
August 13th 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 13th was in 1996 (92°F average), while the coldest was 1993 (68°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 13th dates historically.
Planning for August 13th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 63° | 78° | — | — |
| 2017 | 92° | 63° | 77° | — | — |
| 2016 | 96° | 67° | 81° | — | — |
| 2015 | 101° | 74° | 87° | — | — |
| 2014 | 90° | 63° | 76° | — | — |
| 2013 | 92° | 61° | 76° | — | — |
| 2012 | 103° | 78° | 90° | — | — |
| 2011 | 88° | 62° | 75° | — | — |
| 2010 | 89° | 61° | 75° | — | — |
| 2009 | 93° | 64° | 79° | — | — |
| 2008 | 96° | 63° | 79° | — | — |
| 2007 | 99° | 69° | 84° | — | — |
| 2006 | 89° | 58° | 73° | — | — |
| 2005 | 85° | 58° | 71° | — | — |
| 2004 | 98° | 68° | 83° | — | — |
| 2003 | 102° | 72° | 87° | — | — |
| 2002 | 97° | 65° | 81° | — | — |
| 2001 | 99° | 67° | 83° | — | — |
| 2000 | 103° | 68° | 85° | — | — |
| 1999 | 97° | 63° | 80° | — | — |
| 1998 | 101° | 70° | 85° | — | — |
| 1997 | 96° | 59° | 78° | — | — |
| 1996warmest | 110° | 74° | 92° | — | — |
| 1995 | 97° | 71° | 84° | — | — |
| 1994 | 105° | 71° | 88° | — | — |
| 1993coldest | 81° | 55° | 68° | — | — |
| 1992 | 100° | 72° | 86° | — | — |
| 1991 | 90° | 65° | 77° | — | — |
| 1990 | 89° | 68° | 79° | — | — |
| 1989 | 96° | 67° | 81° | — | — |
| 1988 | 88° | 56° | 72° | — | — |
| 1987 | 83° | 62° | 72° | — | — |
| 1986 | 94° | 62° | 78° | — | — |
| 1985 | 85° | 58° | 71° | — | — |
| 1984 | 99° | 68° | 83° | — | — |
| 1983 | 106° | 75° | 90° | — | — |
| 1982 | 87° | 64° | 76° | — | — |
| 1981 | 97° | 63° | 80° | — | — |
| 1980 | 93° | 65° | 79° | — | — |
| 1979 | 83° | 63° | 73° | — | — |
| 1978 | 84° | 70° | 77° | — | — |
| 1977 | 98° | 64° | 81° | — | — |
| 1976 | 92° | 58° | 75° | — | — |
| 1975 | 92° | 58° | 75° | — | — |
| 1974 | 89° | 64° | 77° | — | — |
| 1973 | 97° | 65° | 81° | 0.05" | — |
| 1972 | 88° | 65° | 76° | — | — |
| 1971 | 98° | 66° | 82° | — | — |
48 years of data from FONTANA 5 N