Weather on September 23
San Bernardino, CA
55 Years of Data
About This Date
September 23rd in San Bernardino, CA typically brings hot fall weather, with average highs around 91°F and lows near 60°F — a 31°F daily swing. Over 48 years of records, the warmest September 23rd was in 2002 (91°F average), while the coldest was 1986 (59°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 23rd dates historically.
Planning for September 23rd in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 67° | 84° | — | — |
| 2017 | 72° | 50° | 61° | — | — |
| 2016 | 80° | 52° | 66° | — | — |
| 2015 | 91° | 64° | 78° | — | — |
| 2014 | 96° | 60° | 78° | — | — |
| 2013 | 91° | 56° | 73° | — | — |
| 2012 | 101° | 67° | 84° | — | — |
| 2011 | 97° | 62° | 79° | — | — |
| 2010 | 88° | 50° | 69° | — | — |
| 2009 | 102° | 62° | 82° | — | — |
| 2008 | — | 56° | — | — | — |
| 2007 | 75° | 53° | 64° | 0.03" | — |
| 2006 | 94° | 55° | 74° | — | — |
| 2005 | 91° | 58° | 74° | — | — |
| 2004 | 96° | 57° | 77° | — | — |
| 2003 | 105° | 63° | 84° | — | — |
| 2002warmest | 107° | 76° | 91° | — | — |
| 2001 | 99° | 59° | 79° | — | — |
| 2000 | 74° | 59° | 66° | — | — |
| 1999 | 91° | 65° | 78° | — | — |
| 1998 | 77° | 58° | 67° | — | — |
| 1997 | 100° | 62° | 81° | — | — |
| 1996 | 83° | 61° | 72° | — | — |
| 1995 | 92° | 59° | 75° | — | — |
| 1994 | 88° | 62° | 75° | — | — |
| 1993 | 86° | 52° | 69° | — | — |
| 1992 | 101° | 70° | 85° | — | — |
| 1991 | 96° | 65° | 80° | — | — |
| 1990 | 79° | 61° | 70° | — | — |
| 1989 | 100° | 59° | 80° | — | — |
| 1988 | 85° | 52° | 68° | — | — |
| 1987 | 86° | 67° | 76° | 0.33" | — |
| 1986coldest | 70° | 49° | 59° | — | — |
| 1985 | 97° | 61° | 79° | — | — |
| 1984 | 82° | 66° | 74° | — | — |
| 1983 | 89° | 69° | 79° | — | — |
| 1982 | 109° | 64° | 87° | — | — |
| 1981 | 84° | 62° | 73° | — | — |
| 1980 | 93° | 54° | 73° | — | — |
| 1979 | 99° | 61° | 80° | — | — |
| 1978 | 103° | 58° | 80° | — | — |
| 1977 | 82° | 55° | 69° | — | — |
| 1976 | 80° | 64° | 72° | — | — |
| 1975 | 102° | 60° | 81° | — | — |
| 1974 | 99° | 64° | 81° | — | — |
| 1973 | 77° | 59° | 68° | — | — |
| 1972 | 88° | 51° | 69° | — | — |
| 1971 | 99° | 49° | 74° | — | — |
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.