Weather on April 15
Rialto, CA
55 Years of Data
Avg High
73°F
Avg Low
49°F
Warmest
1984
77°F avg
Coldest
2009
47°F avg
About This Date
April 15th in Rialto, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 49°F. Over 48 years of records, the warmest April 15th was in 1984 (77°F average), while the coldest was 2009 (47°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 10% of April 15th dates historically, with the wettest April 15th recording 1.65" of rain.
Planning for April 15th in Rialto, CA? Great weather for outdoor activities.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 50° | 59° | — | — |
| 2017 | 80° | 54° | 67° | — | — |
| 2016 | 72° | 46° | 59° | — | — |
| 2015 | 72° | 55° | 63° | — | — |
| 2014 | 80° | 55° | 68° | — | — |
| 2013 | 53° | 47° | 50° | — | — |
| 2012 | 66° | 39° | 53° | — | — |
| 2011 | 81° | 57° | 69° | — | — |
| 2010 | 75° | 50° | 63° | — | — |
| 2009coldest | 56° | 38° | 47° | — | — |
| 2008 | 65° | 47° | 56° | — | — |
| 2007 | 54° | 45° | 49° | — | — |
| 2006 | 56° | 49° | 52° | — | — |
| 2005 | 87° | 59° | 73° | — | — |
| 2004 | 73° | 47° | 60° | — | — |
| 2003 | 56° | 40° | 48° | — | — |
| 2002 | 61° | 49° | 55° | — | — |
| 2001 | 74° | 44° | 59° | — | — |
| 2000 | 65° | 48° | 56° | — | — |
| 1999 | 82° | 64° | 73° | — | — |
| 1998 | 56° | 40° | 48° | — | — |
| 1997 | 85° | 54° | 69° | — | — |
| 1996 | 80° | 53° | 67° | — | — |
| 1995 | 59° | 41° | 50° | — | — |
| 1994 | 87° | 53° | 70° | — | — |
| 1993 | 68° | 47° | 57° | — | — |
| 1992 | 62° | 50° | 56° | — | — |
| 1991 | 65° | 45° | 55° | — | — |
| 1990 | 79° | 53° | 66° | — | — |
| 1989 | 75° | 54° | 64° | — | — |
| 1988 | 65° | 43° | 54° | 1.57" | — |
| 1987 | 95° | 55° | 75° | — | — |
| 1986 | 74° | 45° | 59° | — | — |
| 1985 | 86° | 51° | 69° | — | — |
| 1984warmest | 98° | 56° | 77° | — | — |
| 1983 | 79° | 44° | 61° | — | — |
| 1982 | 63° | 52° | 57° | — | — |
| 1981 | 82° | 49° | 65° | — | — |
| 1980 | 87° | 47° | 67° | — | — |
| 1979 | 85° | 50° | 67° | — | — |
| 1978 | 67° | 52° | 59° | 1.65" | — |
| 1977 | 82° | 47° | 64° | — | — |
| 1976 | 58° | 48° | 53° | 1.19" | — |
| 1975 | 60° | 47° | 53° | 0.03" | — |
| 1974 | 87° | 46° | 67° | — | — |
| 1973 | 65° | 41° | 53° | 0.05" | — |
| 1972 | 82° | 41° | 62° | — | — |
| 1971 | 75° | 49° | 62° | — | — |
48 years of data from DEVORE CALIFORNIA