Weather on September 23
San Bernardino, CA
55 Years of Data
Avg High
91°F
Avg Low
60°F
Warmest
2002
91°F avg
Coldest
1986
59°F avg
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° | — | — |
48 years of data from NORTON AFB