Weather on September 25
San Bernardino, CA
55 Years of Data
Avg High
90°F
Avg Low
61°F
Warmest
2001
85°F avg
Coldest
1986
61°F avg
About This Date
September 25th in San Bernardino, CA typically brings hot fall weather, with average highs around 90°F and lows near 61°F — a 29°F daily swing. Over 48 years of records, the warmest September 25th was in 2001 (85°F average), while the coldest was 1986 (61°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 8% of September 25th dates historically, with the wettest September 25th recording 2.57" of rain.
Planning for September 25th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 66° | 77° | — | — |
| 2017 | 82° | 66° | 74° | — | — |
| 2016 | 90° | 78° | 84° | — | — |
| 2015 | 97° | 71° | 84° | — | — |
| 2014 | 96° | 68° | 82° | — | — |
| 2013 | 81° | 57° | 69° | — | — |
| 2012 | 90° | 59° | 74° | — | — |
| 2011 | 78° | 61° | 69° | — | — |
| 2010 | 106° | 61° | 83° | — | — |
| 2009 | 106° | 62° | 84° | — | — |
| 2008 | 100° | 64° | 82° | — | — |
| 2007 | 92° | 54° | 73° | — | — |
| 2006 | 99° | 56° | 77° | — | — |
| 2005 | 90° | 58° | 74° | — | — |
| 2004 | 100° | 57° | 79° | — | — |
| 2003 | 92° | 59° | 75° | — | — |
| 2002 | 100° | 66° | 83° | — | — |
| 2001warmest | 103° | 67° | 85° | — | — |
| 2000 | 93° | 55° | 74° | — | — |
| 1999 | 90° | 59° | 74° | — | — |
| 1998 | 77° | 52° | 64° | — | — |
| 1997 | 72° | 68° | 70° | 1.57" | — |
| 1996 | 78° | 58° | 68° | — | — |
| 1995 | 87° | 61° | 74° | — | — |
| 1994 | 94° | 57° | 75° | — | — |
| 1993 | 97° | 56° | 76° | — | — |
| 1992 | 96° | 60° | 78° | — | — |
| 1991 | 97° | 65° | 81° | — | — |
| 1990 | 84° | 55° | 70° | — | — |
| 1989 | 88° | 67° | 77° | — | — |
| 1988 | 80° | 51° | 66° | — | — |
| 1987 | 87° | 62° | 75° | — | — |
| 1986coldest | 66° | 55° | 61° | 2.57" | — |
| 1985 | 79° | 68° | 73° | — | — |
| 1984 | 97° | 56° | 76° | — | — |
| 1983 | 91° | 60° | 76° | — | — |
| 1982 | 91° | 73° | 82° | — | — |
| 1981 | 80° | 56° | 68° | — | — |
| 1980 | 103° | 58° | 80° | — | — |
| 1979 | 97° | 65° | 81° | — | — |
| 1978 | 104° | 61° | 82° | — | — |
| 1977 | 89° | 54° | 71° | — | — |
| 1976 | 71° | 63° | 67° | 0.08" | — |
| 1975 | 101° | 59° | 80° | — | — |
| 1974 | 85° | 65° | 75° | 0.05" | — |
| 1973 | 90° | 55° | 72° | — | — |
| 1972 | 79° | 59° | 69° | — | — |
| 1971 | 82° | 50° | 66° | — | — |
48 years of data from NORTON AFB