Weather on September 1
Rialto, CA
55 Years of Data
Avg High
95°F
Avg Low
65°F
Warmest
2007
95°F avg
Coldest
2000
65°F avg
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.
Warming Trend
1.2°F per decade on this date
| 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° | — | — |
47 years of data from DEVORE CALIFORNIA