Weather on September 10
Rialto, CA
55 Years of Data
About This Date
September 10th in Rialto, CA typically brings hot fall weather, with average highs around 90°F and lows near 63°F — a 27°F daily swing. Over 49 years of records, the warmest September 10th was in 2026 (91°F average), while the coldest was 1991 (62°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 10th dates historically, with the wettest September 10th recording 1.79" of rain.
Planning for September 10th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 104° | 79° | 91° | — | — |
| 2025 | 84° | 64° | 74° | — | — |
| 2017 | 96° | 73° | 85° | — | — |
| 2016 | 92° | 67° | 79° | — | — |
| 2015 | 94° | 75° | 84° | — | — |
| 2014 | 95° | 65° | 80° | — | — |
| 2013 | 86° | 63° | 74° | — | — |
| 2012 | 89° | 72° | 80° | — | — |
| 2011 | 76° | 58° | 67° | — | — |
| 2010 | 83° | 51° | 67° | — | — |
| 2009 | 98° | 68° | 83° | — | — |
| 2008 | 83° | 58° | 70° | — | — |
| 2007 | 89° | 61° | 75° | — | — |
| 2006 | 88° | 55° | 71° | — | — |
| 2005 | 76° | 55° | 65° | — | — |
| 2004 | 99° | 71° | 85° | — | — |
| 2003 | 85° | 54° | 69° | — | — |
| 2002 | 100° | 65° | 82° | — | — |
| 2001 | 89° | 56° | 72° | — | — |
| 2000 | 95° | 58° | 76° | — | — |
| 1999 | 94° | 60° | 77° | — | — |
| 1998 | 89° | 58° | 73° | — | — |
| 1997 | 101° | 68° | 84° | — | — |
| 1996 | 99° | 65° | 82° | — | — |
| 1995 | 88° | 67° | 77° | — | — |
| 1994 | 94° | 65° | 79° | — | — |
| 1993 | 106° | 73° | 89° | — | — |
| 1992 | 87° | 60° | 74° | — | — |
| 1991coldest | 72° | 52° | 62° | — | — |
| 1990 | 101° | 66° | 83° | — | — |
| 1989 | 85° | 54° | 69° | — | — |
| 1988 | 86° | 58° | 72° | — | — |
| 1987 | 89° | 58° | 73° | — | — |
| 1986 | 82° | 60° | 71° | — | — |
| 1985 | 73° | 53° | 63° | 0.1" | — |
| 1984 | 90° | 69° | 79° | — | — |
| 1983 | 103° | 76° | 89° | — | — |
| 1982 | 85° | 65° | 75° | — | — |
| 1981 | 95° | 64° | 80° | — | — |
| 1980 | 85° | 60° | 72° | — | — |
| 1979 | 108° | 68° | 88° | — | — |
| 1978 | 88° | 56° | 72° | — | — |
| 1977 | 95° | 63° | 79° | — | — |
| 1976 | 83° | 67° | 75° | 1.79" | — |
| 1975 | 76° | 62° | 69° | — | — |
| 1974 | 97° | 64° | 80° | — | — |
| 1973 | 75° | 61° | 68° | — | — |
| 1972 | 75° | 63° | 69° | — | — |
| 1971 | 106° | 67° | 86° | — | — |
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
Most pleasant months in Rialto, CA: January, February, March, April, May, October, November, December.
What to expect on September 10th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 10th outlook →