Weather on March 18
San Bernardino, CA
55 Years of Data
Avg High
72°F
Avg Low
47°F
Warmest
2026
80°F avg
Coldest
2006
44°F avg
About This Date
March 18th in San Bernardino, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 47°F — a 25°F daily swing. Over 49 years of records, the warmest March 18th was in 2026 (80°F average), while the coldest was 2006 (44°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 12% of March 18th dates historically, with the wettest March 18th recording 2.72" of rain.
Planning for March 18th in San Bernardino, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 100° | 59° | 80° | — | — |
| 2025 | 64° | 46° | 55° | — | — |
| 2017 | 80° | 58° | 69° | — | — |
| 2016 | 76° | 53° | 64° | — | — |
| 2015 | 76° | 57° | 66° | — | — |
| 2014 | 77° | 50° | 64° | — | — |
| 2013 | 68° | 49° | 58° | — | — |
| 2012 | 51° | 40° | 45° | 1.45" | — |
| 2011 | 71° | 42° | 57° | — | — |
| 2010 | 77° | 48° | 63° | — | — |
| 2009 | 86° | 49° | 67° | — | — |
| 2008 | 76° | 39° | 57° | — | — |
| 2007 | 72° | 48° | 60° | — | — |
| 2006coldest | 49° | 39° | 44° | — | — |
| 2005 | 59° | 52° | 55° | — | — |
| 2004 | 88° | 52° | 70° | — | — |
| 2003 | 69° | 43° | 56° | — | — |
| 2002 | 39° | 67° | 53° | 1.52" | — |
| 2001 | 87° | 49° | 68° | — | — |
| 2000 | 89° | 47° | 68° | — | — |
| 1999 | 72° | 43° | 57° | — | — |
| 1998 | 73° | 50° | 62° | — | — |
| 1997 | 90° | 46° | 68° | — | — |
| 1996 | 81° | 50° | 65° | — | — |
| 1995 | 74° | 55° | 64° | — | — |
| 1994 | 78° | 54° | 66° | — | — |
| 1993 | 82° | 48° | 65° | — | — |
| 1992 | 64° | 47° | 55° | — | — |
| 1991 | 69° | 38° | 53° | — | — |
| 1990 | 84° | 47° | 65° | — | — |
| 1989 | 75° | 44° | 60° | — | — |
| 1988 | 79° | 42° | 60° | — | — |
| 1987 | 68° | 39° | 54° | — | — |
| 1986 | 68° | 40° | 54° | — | — |
| 1985 | 65° | 43° | 54° | 0.86" | — |
| 1984 | 77° | 47° | 62° | — | — |
| 1983 | 54° | 67° | 60° | 2.72" | — |
| 1982 | 53° | 37° | 45° | 2.67" | — |
| 1981 | 73° | 46° | 60° | — | — |
| 1980 | 67° | 45° | 56° | — | — |
| 1979 | 55° | 45° | 50° | 0.81" | — |
| 1978 | 79° | 55° | 67° | — | — |
| 1977 | 69° | 37° | 53° | — | — |
| 1976 | 75° | 45° | 60° | — | — |
| 1975 | 77° | 40° | 58° | — | — |
| 1974 | 76° | 49° | 62° | — | — |
| 1973 | 65° | 47° | 56° | — | — |
| 1972 | 68° | 51° | 60° | — | — |
| 1971 | 78° | 43° | 60° | — | — |
49 years of data from NORTON AFB