Weather on August 16
Rialto, CA
55 Years of Data
Avg High
93°F
Avg Low
64°F
Warmest
2015
89°F avg
Coldest
1990
70°F avg
About This Date
August 16th in Rialto, CA typically brings hot summer weather, with average highs around 93°F and lows near 64°F — a 29°F daily swing. Over 48 years of records, the warmest August 16th was in 2015 (89°F average), while the coldest was 1990 (70°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 16th dates historically.
Planning for August 16th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 61° | 75° | — | — |
| 2017 | 80° | 59° | 70° | — | — |
| 2016 | 99° | 68° | 83° | — | — |
| 2015warmest | 103° | 76° | 89° | — | — |
| 2014 | 95° | 67° | 81° | — | — |
| 2013 | 95° | 72° | 83° | — | — |
| 2012 | 99° | 73° | 86° | — | — |
| 2011 | 92° | 65° | 78° | — | — |
| 2010 | 101° | 71° | 86° | — | — |
| 2009 | 84° | 58° | 71° | — | — |
| 2008 | 89° | 65° | 77° | — | — |
| 2007 | 101° | 74° | 87° | — | — |
| 2006 | 85° | 56° | 70° | — | — |
| 2005 | 86° | 58° | 72° | — | — |
| 2004 | 95° | 64° | 80° | — | — |
| 2003 | 98° | 70° | 84° | — | — |
| 2002 | 89° | 61° | 75° | — | — |
| 2001 | 104° | 71° | 88° | — | — |
| 2000 | 102° | 73° | 88° | — | — |
| 1999 | 100° | 61° | 80° | — | — |
| 1998 | 94° | 62° | 78° | — | — |
| 1997 | 84° | 60° | 72° | — | — |
| 1996 | 96° | 68° | 82° | — | — |
| 1995 | 88° | 56° | 72° | — | — |
| 1994 | 101° | 71° | 86° | — | — |
| 1993 | 85° | 55° | 70° | — | — |
| 1992 | 101° | 75° | 88° | — | — |
| 1991 | 85° | 60° | 72° | — | — |
| 1990coldest | 80° | 61° | 70° | — | — |
| 1989 | 91° | 59° | 75° | — | — |
| 1988 | 91° | 56° | 73° | — | — |
| 1987 | 89° | 54° | 71° | — | — |
| 1986 | 94° | 59° | 76° | — | — |
| 1985 | 88° | 61° | 74° | — | — |
| 1984 | 101° | 70° | 85° | — | — |
| 1983 | 92° | 75° | 83° | 0.33" | — |
| 1982 | 98° | 61° | 79° | — | — |
| 1981 | 98° | 63° | 80° | — | — |
| 1980 | 88° | 65° | 76° | — | — |
| 1979 | 94° | 61° | 77° | — | — |
| 1978 | 87° | 69° | 78° | — | — |
| 1977 | 90° | 74° | 82° | 0.46" | — |
| 1976 | 82° | 61° | 71° | — | — |
| 1975 | 91° | 54° | 72° | — | — |
| 1974 | 95° | 56° | 75° | — | — |
| 1973 | 99° | 66° | 82° | — | — |
| 1972 | 90° | 56° | 73° | — | — |
| 1971 | 100° | 65° | 82° | — | — |
48 years of data from FONTANA 5 N