Weather on August 27
Rialto, CA
55 Years of Data
About This Date
August 27th in Rialto, CA typically brings hot summer weather, with average highs around 96°F and lows near 65°F — a 31°F daily swing. Over 48 years of records, the warmest August 27th was in 1981 (91°F average), while the coldest was 1973 (70°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 27th dates historically.
Planning for August 27th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 99° | 71° | 85° | — | — |
| 2017 | 102° | 72° | 87° | — | — |
| 2016 | 82° | 57° | 70° | — | — |
| 2015 | 99° | 74° | 86° | — | — |
| 2014 | 92° | 65° | 78° | — | — |
| 2013 | 95° | 74° | 84° | — | — |
| 2012 | 95° | 65° | 80° | — | — |
| 2011 | 104° | 79° | 91° | — | — |
| 2010 | 95° | 63° | 79° | — | — |
| 2009 | 102° | 73° | 88° | — | — |
| 2008 | 91° | 67° | 79° | — | — |
| 2007 | 92° | 67° | 79° | — | — |
| 2006 | 95° | 66° | 81° | — | — |
| 2005 | 101° | 71° | 86° | — | — |
| 2004 | 90° | 57° | 73° | — | — |
| 2003 | 97° | 71° | 84° | — | — |
| 2002 | 94° | 60° | 77° | — | — |
| 2001 | 100° | 68° | 84° | — | — |
| 2000 | 87° | 65° | 76° | — | — |
| 1999 | 103° | 71° | 87° | — | — |
| 1998 | 102° | 66° | 84° | — | — |
| 1997 | 98° | 65° | 81° | — | — |
| 1996 | 99° | 62° | 80° | — | — |
| 1995 | 98° | 66° | 82° | — | — |
| 1994 | 95° | 58° | 76° | — | — |
| 1993 | 92° | 69° | 80° | — | — |
| 1992 | 95° | 69° | 82° | — | — |
| 1991 | 83° | 57° | 70° | — | — |
| 1990 | 93° | 56° | 74° | — | — |
| 1989 | 87° | 54° | 70° | — | — |
| 1988 | 92° | 70° | 81° | — | — |
| 1987 | 99° | 59° | 79° | — | — |
| 1986 | 97° | 69° | 83° | — | — |
| 1985 | 101° | 68° | 84° | — | — |
| 1984 | 103° | 68° | 85° | — | — |
| 1983 | 104° | 67° | 85° | — | — |
| 1982 | 98° | 70° | 84° | — | — |
| 1981warmest | 111° | 72° | 91° | — | — |
| 1980 | 97° | 59° | 78° | — | — |
| 1979 | 100° | 63° | 81° | — | — |
| 1978 | 85° | 68° | 76° | — | — |
| 1977 | 88° | 65° | 76° | — | — |
| 1976 | 101° | 62° | 81° | — | — |
| 1975 | 94° | 53° | 73° | — | — |
| 1974 | 96° | 57° | 77° | — | — |
| 1973coldest | 82° | 58° | 70° | — | — |
| 1972 | 87° | 63° | 75° | 0.05" | — |
| 1971 | 105° | 62° | 84° | — | — |
Rialto, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Rialto, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rialto, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Rialto, CA
Rialto, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.