Weather on September 1
Rialto, CA
55 Years of Data
About This Date
September 1st in Rialto, CA typically brings hot fall weather, with average highs around 95°F and lows near 65°F — a 30°F daily swing. Over 47 years of records, the warmest September 1st was in 2007 (95°F average), while the coldest was 2000 (65°F) — a 30°F range across recorded history. This date has historically been dry, with little recorded precipitation.
Planning for September 1st in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2017 | 104° | 82° | 93° | — | — |
| 2016 | 94° | 66° | 80° | — | — |
| 2015 | 85° | 59° | 72° | — | — |
| 2014 | 93° | 67° | 80° | — | — |
| 2013 | 90° | 70° | 80° | — | — |
| 2012 | 91° | 64° | 78° | — | — |
| 2011 | 91° | 62° | 77° | — | — |
| 2010 | 97° | 63° | 80° | — | — |
| 2009 | 98° | 77° | 88° | — | — |
| 2008 | 89° | 64° | 77° | — | — |
| 2007warmest | 105° | 85° | 95° | — | — |
| 2006 | 102° | 72° | 87° | — | — |
| 2005 | 94° | 59° | 76° | — | — |
| 2004 | 103° | 73° | 88° | — | — |
| 2003 | 101° | 65° | 83° | — | — |
| 2002 | 107° | 80° | 94° | — | — |
| 2001 | 96° | 62° | 79° | — | — |
| 2000coldest | 74° | 57° | 65° | — | — |
| 1999 | 79° | 53° | 66° | — | — |
| 1998 | 101° | 80° | 90° | — | — |
| 1997 | 99° | 67° | 83° | — | — |
| 1996 | 98° | 65° | 81° | — | — |
| 1995 | 104° | 74° | 89° | — | — |
| 1994 | 88° | 60° | 74° | — | — |
| 1993 | 95° | 66° | 81° | — | — |
| 1992 | 80° | 54° | 67° | — | — |
| 1991 | 98° | 69° | 84° | — | — |
| 1990 | 94° | 61° | 77° | — | — |
| 1989 | 95° | 54° | 74° | — | — |
| 1988 | 98° | 67° | 82° | — | — |
| 1987 | 102° | 71° | 87° | — | — |
| 1986 | 87° | 57° | 72° | — | — |
| 1985 | 97° | 68° | 82° | — | — |
| 1984 | 95° | 65° | 80° | — | — |
| 1983 | 96° | 66° | 81° | — | — |
| 1982 | 104° | 64° | 84° | — | — |
| 1981 | 98° | 61° | 79° | — | — |
| 1980 | 89° | 62° | 76° | — | — |
| 1979 | 92° | 62° | 77° | — | — |
| 1978 | 100° | 60° | 80° | — | — |
| 1977 | 91° | 57° | 74° | — | — |
| 1976 | 100° | 62° | 81° | — | — |
| 1975 | 94° | 55° | 74° | — | — |
| 1974 | 101° | 62° | 81° | — | — |
| 1973 | 85° | 54° | 69° | — | — |
| 1972 | 98° | 62° | 80° | — | — |
| 1971 | 98° | 58° | 78° | — | — |
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.