Weather on September 28
San Bernardino, CA
55 Years of Data
Avg High
88°F
Avg Low
60°F
Warmest
1978
85°F avg
Coldest
1986
62°F avg
About This Date
September 28th in San Bernardino, CA typically brings warm fall weather, with average highs around 88°F and lows near 60°F — a 28°F daily swing. Over 48 years of records, the warmest September 28th was in 1978 (85°F average), while the coldest was 1986 (62°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation.
Planning for September 28th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 63° | 72° | — | — |
| 2017 | 91° | 70° | 80° | — | — |
| 2016 | 89° | 68° | 79° | — | — |
| 2015 | 89° | 66° | 78° | — | — |
| 2014 | 76° | 59° | 67° | — | — |
| 2013 | 86° | 52° | 69° | — | — |
| 2012 | 95° | 58° | 76° | — | — |
| 2011 | 93° | 60° | 77° | — | — |
| 2010 | 98° | 71° | 85° | — | — |
| 2009 | 93° | 58° | 75° | — | — |
| 2008 | 95° | 61° | 78° | — | — |
| 2007 | 68° | 56° | 62° | — | — |
| 2006 | 102° | 57° | 80° | — | — |
| 2005 | 99° | 56° | 77° | — | — |
| 2004 | 82° | 51° | 67° | — | — |
| 2003 | 91° | 58° | 74° | — | — |
| 2002 | 81° | 57° | 69° | — | — |
| 2001 | 98° | 62° | 80° | — | — |
| 2000 | 86° | 61° | 73° | — | — |
| 1999 | 100° | 56° | 78° | — | — |
| 1998 | 78° | 52° | 65° | — | — |
| 1997 | 99° | 68° | 83° | — | — |
| 1996 | 94° | 64° | 79° | — | — |
| 1995 | 82° | 58° | 70° | — | — |
| 1994 | 94° | 67° | 80° | — | — |
| 1993 | 101° | 62° | 81° | — | — |
| 1992 | 102° | 64° | 83° | — | — |
| 1991 | 91° | 61° | 76° | — | — |
| 1990 | 77° | 62° | 70° | — | — |
| 1989 | 91° | 63° | 77° | — | — |
| 1988 | 88° | 52° | 70° | — | — |
| 1987 | 59° | 97° | 78° | — | — |
| 1986coldest | 70° | 55° | 62° | — | — |
| 1985 | 75° | 62° | 69° | — | — |
| 1984 | 100° | 63° | 81° | — | — |
| 1983 | 76° | 62° | 69° | — | — |
| 1982 | 75° | 52° | 63° | — | — |
| 1981 | 90° | 57° | 73° | — | — |
| 1980 | 96° | 56° | 76° | — | — |
| 1979 | 91° | 64° | 78° | — | — |
| 1978warmest | 105° | 65° | 85° | — | — |
| 1977 | 87° | 54° | 70° | — | — |
| 1976 | 84° | 56° | 70° | — | — |
| 1975 | 89° | 55° | 72° | — | — |
| 1974 | 88° | 53° | 70° | — | — |
| 1973 | 98° | 55° | 77° | — | — |
| 1972 | 85° | 59° | 72° | — | — |
| 1971 | 82° | 46° | 64° | — | — |
48 years of data from NORTON AFB