Weather on September 1
San Bernardino, CA
55 Years of Data
Avg High
96°F
Avg Low
63°F
Warmest
2017
93°F avg
Coldest
1973
69°F avg
About This Date
September 1st in San Bernardino, CA typically brings hot fall weather, with average highs around 96°F and lows near 63°F — a 33°F daily swing. Over 47 years of records, the warmest September 1st was in 2017 (93°F average), while the coldest was 1973 (69°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 1st dates historically.
Planning for September 1st in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2017warmest | 104° | 82° | 93° | — | — |
| 2016 | 94° | 66° | 80° | — | — |
| 2015 | 85° | 59° | 72° | — | — |
| 2014 | 98° | 64° | 81° | — | — |
| 2013 | 92° | 73° | 82° | — | — |
| 2012 | 97° | 61° | 79° | — | — |
| 2011 | 98° | 58° | 78° | — | — |
| 2010 | 100° | 59° | 80° | — | — |
| 2009 | 103° | 73° | 88° | — | — |
| 2008 | 93° | 62° | 78° | — | — |
| 2007 | 110° | 74° | 92° | — | — |
| 2006 | 104° | 62° | 83° | — | — |
| 2005 | 94° | 55° | 74° | — | — |
| 2004 | 105° | 63° | 84° | — | — |
| 2003 | 99° | 66° | 82° | — | — |
| 2002 | 109° | 66° | 88° | — | — |
| 2001 | 96° | 57° | 77° | — | — |
| 2000 | 80° | 61° | 70° | — | — |
| 1999 | 81° | 57° | 69° | — | — |
| 1998 | 106° | 70° | 88° | 0.38" | — |
| 1997 | 98° | 66° | 82° | — | — |
| 1996 | 97° | 69° | 83° | — | — |
| 1995 | 102° | 67° | 84° | — | — |
| 1994 | 88° | 60° | 74° | — | — |
| 1993 | 95° | 68° | 82° | — | — |
| 1992 | 82° | 58° | 70° | — | — |
| 1991 | 101° | 57° | 79° | — | — |
| 1990 | 94° | 61° | 77° | — | — |
| 1989 | 95° | 54° | 74° | — | — |
| 1988 | 98° | 67° | 82° | — | — |
| 1987 | 102° | 71° | 87° | — | — |
| 1986 | 87° | 57° | 72° | — | — |
| 1985 | 97° | 68° | 82° | — | — |
| 1984 | 95° | 65° | 80° | — | — |
| 1983 | 96° | 66° | 81° | — | — |
| 1982 | 104° | 64° | 84° | — | — |
| 1981 | 98° | 61° | 79° | — | — |
| 1980 | 89° | 62° | 76° | — | — |
| 1979 | 92° | 62° | 77° | — | — |
| 1978 | 100° | 60° | 80° | — | — |
| 1977 | 91° | 57° | 74° | — | — |
| 1976 | 100° | 62° | 81° | — | — |
| 1975 | 94° | 55° | 74° | — | — |
| 1974 | 101° | 62° | 81° | — | — |
| 1973coldest | 85° | 54° | 69° | — | — |
| 1972 | 98° | 62° | 80° | — | — |
| 1971 | 98° | 58° | 78° | — | — |
47 years of data from NORTON AFB