Weather on September 11
San Bernardino, CA
55 Years of Data
About This Date
September 11th in San Bernardino, CA typically brings hot fall weather, with average highs around 91°F and lows near 61°F — a 30°F daily swing. Over 48 years of records, the warmest September 11th was in 1971 (89°F average), while the coldest was 1976 (65°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 11th dates historically, with the wettest September 11th recording 7.19" of rain.
Planning for September 11th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 63° | 73° | — | — |
| 2017 | 97° | 68° | 82° | — | — |
| 2016 | 88° | 63° | 75° | — | — |
| 2015 | 97° | 73° | 85° | — | — |
| 2014 | 98° | 66° | 82° | — | — |
| 2013 | 86° | 60° | 73° | — | — |
| 2012 | 87° | 73° | 80° | — | — |
| 2011 | 86° | 61° | 73° | — | — |
| 2010 | 94° | 50° | 72° | — | — |
| 2009 | 96° | 65° | 80° | — | — |
| 2008 | 85° | 57° | 71° | — | — |
| 2007 | 99° | 56° | 77° | — | — |
| 2006 | 99° | 58° | 78° | — | — |
| 2005 | 79° | 59° | 69° | — | — |
| 2004 | 100° | 69° | 85° | — | — |
| 2003 | 99° | 58° | 78° | — | — |
| 2002 | 93° | 54° | 73° | — | — |
| 2001 | 88° | 59° | 73° | — | — |
| 2000 | 99° | 58° | 78° | — | — |
| 1999 | 94° | 57° | 75° | — | — |
| 1998 | 91° | 57° | 74° | — | — |
| 1997 | 93° | 65° | 79° | — | — |
| 1996 | 92° | 63° | 77° | — | — |
| 1995 | 96° | 58° | 77° | — | — |
| 1994 | 90° | 56° | 73° | — | — |
| 1993 | 100° | 66° | 83° | — | — |
| 1992 | 87° | 60° | 74° | — | — |
| 1991 | 80° | 54° | 67° | — | — |
| 1990 | 103° | 63° | 83° | — | — |
| 1989 | 82° | 56° | 69° | — | — |
| 1988 | 82° | 56° | 69° | — | — |
| 1987 | 85° | 58° | 71° | — | — |
| 1986 | 83° | 56° | 69° | — | — |
| 1985 | 89° | 48° | 69° | — | — |
| 1984 | 84° | 70° | 77° | — | — |
| 1983 | 108° | 71° | 89° | — | — |
| 1982 | 86° | 64° | 75° | — | — |
| 1981 | 98° | 61° | 79° | — | — |
| 1980 | 90° | 56° | 73° | — | — |
| 1979 | 107° | 68° | 88° | — | — |
| 1978 | 85° | 61° | 73° | — | — |
| 1977 | 93° | 64° | 79° | — | — |
| 1976coldest | 69° | 61° | 65° | 7.19" | — |
| 1975 | 78° | 58° | 68° | — | — |
| 1974 | 94° | 60° | 77° | — | — |
| 1973 | 85° | 62° | 73° | — | — |
| 1972 | 80° | 59° | 70° | — | — |
| 1971warmest | 110° | 68° | 89° | — | — |
San Bernardino, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Bernardino, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Bernardino, 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 San Bernardino, CA
San Bernardino, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.