Weather on May 18
San Bernardino, CA
55 Years of Data
Avg High
82°F
Avg Low
54°F
Warmest
2008
83°F avg
Coldest
1994
55°F avg
About This Date
May 18th in San Bernardino, CA typically brings warm spring weather, with average highs around 82°F and lows near 54°F — a 28°F daily swing. Over 48 years of records, the warmest May 18th was in 2008 (83°F average), while the coldest was 1994 (55°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 18th dates historically, with the wettest May 18th recording 0.81" of rain.
Planning for May 18th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 55° | 64° | — | — |
| 2017 | 79° | 48° | 63° | — | — |
| 2016 | 84° | 54° | 69° | — | — |
| 2015 | 63° | 53° | 58° | — | — |
| 2014 | 81° | 58° | 69° | — | — |
| 2013 | 80° | 58° | 69° | — | — |
| 2012 | 79° | 57° | 68° | — | — |
| 2011 | 63° | 49° | 56° | 0.81" | — |
| 2010 | 71° | 51° | 61° | — | — |
| 2009 | 95° | 59° | 77° | — | — |
| 2008warmest | 103° | 64° | 83° | — | — |
| 2007 | 85° | 54° | 69° | — | — |
| 2006 | 89° | 53° | 71° | — | — |
| 2005 | 82° | 52° | 67° | — | — |
| 2004 | 83° | 56° | 69° | — | — |
| 2003 | 79° | 55° | 67° | — | — |
| 2002 | 84° | 56° | 70° | — | — |
| 2001 | 83° | 58° | 70° | — | — |
| 2000 | 92° | 50° | 71° | — | — |
| 1999 | 89° | 55° | 72° | — | — |
| 1998 | 84° | 50° | 67° | — | — |
| 1997 | 83° | 53° | 68° | — | — |
| 1996 | 83° | 57° | 70° | — | — |
| 1995 | 79° | 52° | 65° | — | — |
| 1994coldest | 62° | 48° | 55° | 0.61" | — |
| 1993 | 76° | 60° | 68° | — | — |
| 1992 | 89° | 56° | 72° | — | — |
| 1991 | 71° | 47° | 59° | — | — |
| 1990 | 75° | 54° | 64° | — | — |
| 1989 | 74° | 56° | 65° | — | — |
| 1988 | 82° | 51° | 67° | — | — |
| 1987 | 78° | 59° | 69° | — | — |
| 1986 | 96° | 57° | 77° | — | — |
| 1985 | 80° | 49° | 64° | — | — |
| 1984 | 92° | 55° | 73° | — | — |
| 1983 | 90° | 52° | 71° | — | — |
| 1982 | 79° | 55° | 67° | — | — |
| 1981 | 86° | 45° | 65° | — | — |
| 1980 | 91° | 55° | 73° | — | — |
| 1979 | 83° | 54° | 68° | — | — |
| 1978 | 94° | 52° | 73° | — | — |
| 1977 | 76° | 41° | 58° | — | — |
| 1976 | 89° | 54° | 71° | — | — |
| 1975 | 79° | 53° | 66° | — | — |
| 1974 | 68° | 51° | 60° | — | — |
| 1973 | 88° | 55° | 71° | — | — |
| 1972 | 73° | 53° | 63° | — | — |
| 1971 | 89° | 50° | 70° | — | — |
48 years of data from NORTON AFB