Weather on September 3
Rialto, CA
55 Years of Data
Avg High
95°F
Avg Low
65°F
Warmest
2007
94°F avg
Coldest
1999
68°F avg
About This Date
September 3rd 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 48 years of records, the warmest September 3rd was in 2007 (94°F average), while the coldest was 1999 (68°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 3rd dates historically.
Planning for September 3rd in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 74° | 87° | — | — |
| 2017 | 94° | 70° | 82° | — | — |
| 2016 | 80° | 59° | 70° | — | — |
| 2015 | 80° | 59° | 70° | — | — |
| 2014 | 88° | 61° | 74° | — | — |
| 2013 | 96° | 75° | 86° | — | — |
| 2012 | 97° | 67° | 82° | — | — |
| 2011 | 94° | 67° | 80° | — | — |
| 2010 | 103° | 73° | 88° | — | — |
| 2009 | 98° | 75° | 87° | — | — |
| 2008 | 97° | 70° | 83° | — | — |
| 2007warmest | 106° | 82° | 94° | — | — |
| 2006 | 99° | 76° | 87° | — | — |
| 2005 | 95° | 63° | 79° | — | — |
| 2004 | 84° | 57° | 71° | — | — |
| 2003 | 98° | 67° | 82° | — | — |
| 2002 | 101° | 69° | 85° | — | — |
| 2001 | 91° | 63° | 77° | — | — |
| 2000 | 84° | 52° | 68° | — | — |
| 1999coldest | 81° | 55° | 68° | — | — |
| 1998 | 102° | 76° | 89° | — | — |
| 1997 | 98° | 75° | 87° | — | — |
| 1996 | 94° | 62° | 78° | — | — |
| 1995 | 101° | 74° | 87° | — | — |
| 1994 | 93° | 58° | 75° | — | — |
| 1993 | 99° | 68° | 83° | — | — |
| 1992 | 83° | 58° | 70° | — | — |
| 1991 | 94° | 66° | 80° | — | — |
| 1990 | 95° | 69° | 82° | — | — |
| 1989 | 97° | 54° | 75° | — | — |
| 1988 | 108° | 72° | 90° | — | — |
| 1987 | 96° | 65° | 80° | — | — |
| 1986 | 89° | 59° | 74° | — | — |
| 1985 | 78° | 65° | 71° | — | — |
| 1984 | 104° | 69° | 87° | — | — |
| 1983 | 101° | 68° | 84° | — | — |
| 1982 | 110° | 70° | 90° | — | — |
| 1981 | 92° | 60° | 76° | — | — |
| 1980 | 97° | 56° | 76° | — | — |
| 1979 | 99° | 61° | 80° | — | — |
| 1978 | 101° | 65° | 83° | — | — |
| 1977 | 97° | 62° | 79° | — | — |
| 1976 | 99° | 71° | 85° | 0.3" | — |
| 1975 | 101° | 61° | 81° | — | — |
| 1974 | 100° | 65° | 82° | — | — |
| 1973 | 88° | 58° | 73° | — | — |
| 1972 | 88° | 63° | 75° | 0.08" | — |
| 1971 | 95° | 59° | 77° | — | — |
48 years of data from DEVORE CALIFORNIA