Weather on April 20
Rialto, CA
55 Years of Data
Avg High
75°F
Avg Low
49°F
Warmest
2009
82°F avg
Coldest
1995
44°F avg
About This Date
April 20th in Rialto, CA typically brings pleasant spring weather, with average highs around 75°F and lows near 49°F — a 26°F daily swing. Over 48 years of records, the warmest April 20th was in 2009 (82°F average), while the coldest was 1995 (44°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 6% of April 20th dates historically, with the wettest April 20th recording 2.54" of rain.
Planning for April 20th in Rialto, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 46° | 64° | — | — |
| 2017 | 78° | 54° | 66° | — | — |
| 2016 | 84° | 56° | 70° | — | — |
| 2015 | 73° | 51° | 62° | — | — |
| 2014 | 81° | 52° | 66° | — | — |
| 2013 | 89° | 54° | 71° | — | — |
| 2012 | 93° | 66° | 80° | — | — |
| 2011 | 61° | 52° | 56° | — | — |
| 2010 | 65° | 44° | 54° | — | — |
| 2009warmest | 94° | 70° | 82° | — | — |
| 2008 | 62° | 46° | 54° | — | — |
| 2007 | 46° | 43° | 44° | — | — |
| 2006 | 78° | 50° | 64° | — | — |
| 2005 | 70° | 43° | 56° | — | — |
| 2004 | 73° | 43° | 58° | — | — |
| 2003 | 76° | 52° | 64° | — | — |
| 2002 | 68° | 38° | 53° | — | — |
| 2001 | 57° | 43° | 50° | — | — |
| 2000 | 83° | 52° | 67° | — | — |
| 1999 | 82° | 53° | 68° | — | — |
| 1998 | 90° | 55° | 72° | — | — |
| 1997 | 87° | 51° | 69° | — | — |
| 1996 | 70° | 47° | 58° | — | — |
| 1995coldest | 49° | 40° | 44° | — | — |
| 1994 | 85° | 56° | 70° | — | — |
| 1993 | 85° | 58° | 71° | — | — |
| 1992 | 80° | 53° | 67° | — | — |
| 1991 | 62° | 45° | 53° | — | — |
| 1990 | 74° | 55° | 64° | — | — |
| 1989 | 87° | 54° | 70° | — | — |
| 1988 | 55° | 48° | 52° | 2.54" | — |
| 1987 | 84° | 50° | 67° | — | — |
| 1986 | 91° | 47° | 69° | — | — |
| 1985 | 62° | 51° | 57° | — | — |
| 1984 | 74° | 48° | 61° | — | — |
| 1983 | 65° | 51° | 58° | 2.08" | — |
| 1982 | 84° | 53° | 69° | — | — |
| 1981 | 65° | 49° | 57° | 0.18" | — |
| 1980 | 84° | 52° | 68° | — | — |
| 1979 | 83° | 45° | 64° | — | — |
| 1978 | 70° | 48° | 59° | — | — |
| 1977 | 85° | 44° | 64° | — | — |
| 1976 | 88° | 48° | 68° | — | — |
| 1975 | 82° | 43° | 62° | — | — |
| 1974 | 70° | 44° | 57° | — | — |
| 1973 | 72° | 42° | 57° | — | — |
| 1972 | 74° | 37° | 55° | — | — |
| 1971 | 58° | 47° | 52° | — | — |
48 years of data from DEVORE CALIFORNIA