Weather on April 21
San Bernardino, CA
55 Years of Data
About This Date
April 21st in San Bernardino, CA typically brings pleasant spring weather, with average highs around 78°F and lows near 50°F — a 28°F daily swing. Over 49 years of records, the warmest April 21st was in 2009 (80°F average), while the coldest was 2010 (49°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 16% of April 21st dates historically, with the wettest April 21st recording 1.32" of rain.
Planning for April 21st in San Bernardino, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 77° | 52° | 65° | — | — |
| 2025 | 81° | 51° | 66° | — | — |
| 2017 | 86° | 62° | 74° | — | — |
| 2016 | 82° | 55° | 69° | — | — |
| 2015 | 77° | 50° | 64° | — | — |
| 2014 | 87° | 56° | 71° | — | — |
| 2013 | 91° | 52° | 71° | — | — |
| 2012 | 97° | 57° | 77° | — | — |
| 2011 | 70° | 54° | 62° | — | — |
| 2010coldest | 56° | 43° | 49° | 0.3" | — |
| 2009warmest | 100° | 60° | 80° | — | — |
| 2008 | 74° | 42° | 58° | — | — |
| 2007 | 63° | 44° | 53° | 0.94" | — |
| 2006 | 80° | 47° | 63° | — | — |
| 2005 | 85° | 44° | 64° | — | — |
| 2004 | 70° | 48° | 59° | — | — |
| 2003 | 68° | 44° | 56° | — | — |
| 2002 | 85° | 45° | 65° | — | — |
| 2001 | 59° | 45° | 52° | 1.3" | — |
| 2000 | 66° | 51° | 59° | — | — |
| 1999 | 81° | 54° | 67° | — | — |
| 1998 | 93° | 56° | 74° | — | — |
| 1997 | 88° | 57° | 72° | — | — |
| 1996 | 74° | 46° | 60° | — | — |
| 1995 | 71° | 43° | 57° | — | — |
| 1994 | 74° | 56° | 65° | — | — |
| 1993 | 88° | 55° | 71° | — | — |
| 1992 | 80° | 53° | 67° | — | — |
| 1991 | 71° | 49° | 60° | 0.03" | — |
| 1990 | 74° | 56° | 65° | — | — |
| 1989 | 77° | 55° | 66° | — | — |
| 1988 | 62° | 45° | 53° | 0.23" | — |
| 1987 | 91° | 51° | 71° | — | — |
| 1986 | 89° | 55° | 72° | — | — |
| 1985 | 57° | 49° | 53° | — | — |
| 1984 | 81° | 58° | 69° | — | — |
| 1983 | 67° | 50° | 58° | 1.32" | — |
| 1982 | 75° | 58° | 66° | — | — |
| 1981 | 85° | 47° | 66° | 0.03" | — |
| 1980 | 71° | 56° | 63° | — | — |
| 1979 | 84° | 46° | 65° | — | — |
| 1978 | 69° | 51° | 60° | — | — |
| 1977 | 85° | 45° | 65° | — | — |
| 1976 | 86° | 50° | 68° | — | — |
| 1975 | 76° | 48° | 62° | — | — |
| 1974 | 85° | 44° | 64° | — | — |
| 1973 | 78° | 44° | 61° | — | — |
| 1972 | 83° | 42° | 62° | — | — |
| 1971 | 58° | 47° | 52° | 0.1" | — |
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.