Weather on October 21
San Bernardino, CA
55 Years of Data
About This Date
October 21st in San Bernardino, CA typically brings warm fall weather, with average highs around 80°F and lows near 54°F — a 26°F daily swing. Over 48 years of records, the warmest October 21st was in 2003 (81°F average), while the coldest was 2004 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 21st dates historically, with the wettest October 21st recording 0.61" of rain.
Planning for October 21st in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 55° | 73° | — | — |
| 2017 | 77° | 55° | 66° | — | — |
| 2016 | 91° | 65° | 78° | — | — |
| 2015 | 78° | 59° | 69° | — | — |
| 2014 | 80° | 56° | 68° | — | — |
| 2013 | 83° | 51° | 67° | — | — |
| 2012 | 70° | 61° | 65° | — | — |
| 2011 | 80° | 55° | 68° | — | — |
| 2010 | 60° | 56° | 58° | 0.15" | — |
| 2009 | 86° | 50° | 68° | — | — |
| 2008 | 94° | 52° | 73° | — | — |
| 2007 | 84° | 50° | 67° | — | — |
| 2006 | 96° | 50° | 73° | — | — |
| 2005 | 78° | 49° | 63° | — | — |
| 2004coldest | 64° | 50° | 57° | 0.61" | — |
| 2003warmest | 102° | 60° | 81° | — | — |
| 2002 | 75° | 53° | 64° | — | — |
| 2001 | 85° | 58° | 71° | — | — |
| 2000 | 79° | 58° | 68° | 0.05" | — |
| 1999 | 94° | 54° | 74° | — | — |
| 1998 | 81° | 51° | 66° | — | — |
| 1997 | 72° | 58° | 65° | — | — |
| 1996 | 72° | 56° | 64° | — | — |
| 1995 | 88° | 52° | 70° | — | — |
| 1994 | 80° | 47° | 63° | — | — |
| 1993 | 83° | 56° | 69° | — | — |
| 1992 | 68° | 52° | 60° | — | — |
| 1991 | 76° | 59° | 67° | — | — |
| 1990 | 82° | 46° | 64° | — | — |
| 1989 | 68° | 56° | 62° | 0.13" | — |
| 1988 | 81° | 57° | 69° | — | — |
| 1987 | 78° | 55° | 67° | — | — |
| 1986 | 80° | 47° | 63° | — | — |
| 1985 | 68° | 56° | 62° | 0.05" | — |
| 1984 | 75° | 49° | 62° | — | — |
| 1983 | 90° | 53° | 71° | — | — |
| 1982 | 84° | 53° | 69° | — | — |
| 1981 | 84° | 50° | 67° | — | — |
| 1980 | 89° | 51° | 70° | — | — |
| 1979 | 76° | 48° | 62° | — | — |
| 1978 | 79° | 58° | 68° | — | — |
| 1977 | 74° | 56° | 65° | — | — |
| 1976 | 80° | 62° | 71° | 0.13" | — |
| 1975 | 78° | 52° | 65° | — | — |
| 1974 | 72° | 57° | 64° | — | — |
| 1973 | 80° | 47° | 63° | — | — |
| 1972 | 72° | 47° | 59° | — | — |
| 1971 | 87° | 43° | 65° | — | — |
San Bernardino, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Bernardino, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Bernardino, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Bernardino, CA
San Bernardino, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.