Weather on August 31
San Bernardino, CA
55 Years of Data
Avg High
96°F
Avg Low
64°F
Warmest
2007
92°F avg
Coldest
1992
68°F avg
About This Date
August 31st in San Bernardino, CA typically brings hot summer weather, with average highs around 96°F and lows near 64°F — a 32°F daily swing. Over 47 years of records, the warmest August 31st was in 2007 (92°F average), while the coldest was 1992 (68°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 31st dates historically.
Planning for August 31st in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2017 | 106° | 75° | 90° | — | — |
| 2016 | 98° | 74° | 86° | — | — |
| 2015 | 89° | 65° | 77° | — | — |
| 2014 | 96° | 67° | 81° | — | — |
| 2013 | 91° | 74° | 82° | 0.13" | — |
| 2012 | 97° | 69° | 83° | 0.15" | — |
| 2011 | 98° | 58° | 78° | — | — |
| 2010 | 90° | 54° | 72° | — | — |
| 2009 | 104° | 64° | 84° | — | — |
| 2008 | 91° | 67° | 79° | — | — |
| 2007warmest | 110° | 74° | 92° | — | — |
| 2006 | 96° | 67° | 81° | — | — |
| 2005 | 99° | 58° | 78° | — | — |
| 2004 | 102° | 63° | 82° | — | — |
| 2003 | 97° | 65° | 81° | — | — |
| 2002 | 97° | 58° | 77° | — | — |
| 2001 | 92° | 58° | 75° | — | — |
| 2000 | 80° | 61° | 70° | — | — |
| 1999 | 93° | 69° | 81° | — | — |
| 1998 | 106° | 76° | 91° | — | — |
| 1997 | 97° | 63° | 80° | — | — |
| 1996 | 97° | 69° | 83° | — | — |
| 1995 | 104° | 67° | 85° | — | — |
| 1994 | 88° | 60° | 74° | — | — |
| 1993 | 92° | 63° | 77° | — | — |
| 1992coldest | 80° | 56° | 68° | — | — |
| 1991 | 95° | 60° | 78° | — | — |
| 1990 | 91° | 62° | 77° | — | — |
| 1989 | 91° | 54° | 72° | — | — |
| 1988 | 97° | 68° | 82° | — | — |
| 1987 | 99° | 66° | 82° | — | — |
| 1986 | 94° | 57° | 75° | — | — |
| 1985 | 103° | 70° | 86° | — | — |
| 1984 | 101° | 71° | 86° | — | — |
| 1983 | 99° | 64° | 81° | — | — |
| 1982 | 100° | 64° | 82° | — | — |
| 1981 | 96° | 60° | 78° | — | — |
| 1980 | 91° | 57° | 74° | — | — |
| 1979 | 92° | 58° | 75° | — | — |
| 1978 | 101° | 59° | 80° | — | — |
| 1977 | 90° | 64° | 77° | — | — |
| 1976 | 104° | 68° | 86° | — | — |
| 1975 | 97° | 57° | 77° | — | — |
| 1974 | 101° | 58° | 79° | — | — |
| 1973 | 86° | 55° | 71° | — | — |
| 1972 | 97° | 66° | 81° | — | — |
| 1971 | 95° | 54° | 74° | — | — |
47 years of data from NORTON AFB