Weather on March 20
Rialto, CA
55 Years of Data
Avg High
71°F
Avg Low
48°F
Warmest
2026
81°F avg
Coldest
1991
41°F avg
About This Date
March 20th in Rialto, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 48°F. Over 49 years of records, the warmest March 20th was in 2026 (81°F average), while the coldest was 1991 (41°F) — a 40°F range across recorded history. Rain or other precipitation has occurred on about 8% of March 20th dates historically, with the wettest March 20th recording 1.45" of rain.
Planning for March 20th in Rialto, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 102° | 60° | 81° | — | — |
| 2025 | 73° | 46° | 60° | — | — |
| 2017 | 69° | 50° | 60° | — | — |
| 2016 | 75° | 53° | 64° | — | — |
| 2015 | 82° | 54° | 68° | — | — |
| 2014 | 75° | 52° | 63° | — | — |
| 2013 | 68° | 51° | 60° | — | — |
| 2012 | 66° | 40° | 53° | — | — |
| 2011 | 50° | 41° | 46° | — | — |
| 2010 | 79° | 54° | 66° | — | — |
| 2009 | 73° | 50° | 62° | — | — |
| 2008 | 69° | 45° | 57° | — | — |
| 2007 | 58° | 47° | 52° | — | — |
| 2006 | 49° | 41° | 45° | — | — |
| 2005 | 62° | 47° | 54° | — | — |
| 2004 | 94° | 54° | 74° | — | — |
| 2003 | 61° | 41° | 51° | — | — |
| 2002 | 86° | 51° | 69° | — | — |
| 2001 | 85° | 56° | 70° | — | — |
| 2000 | 61° | 48° | 54° | — | — |
| 1999 | 59° | 39° | 49° | — | — |
| 1998 | 73° | 47° | 60° | — | — |
| 1997 | 94° | 59° | 76° | — | — |
| 1996 | 84° | 56° | 70° | — | — |
| 1995 | 62° | 53° | 58° | — | — |
| 1994 | 68° | 53° | 61° | — | — |
| 1993 | 73° | 53° | 63° | — | — |
| 1992 | 54° | 47° | 50° | — | — |
| 1991coldest | 47° | 36° | 41° | — | — |
| 1990 | 86° | 56° | 71° | — | — |
| 1989 | 78° | 55° | 67° | — | — |
| 1988 | 85° | 46° | 65° | — | — |
| 1987 | 64° | 36° | 50° | 0.3" | — |
| 1986 | 79° | 44° | 61° | — | — |
| 1985 | 80° | 42° | 61° | — | — |
| 1984 | 91° | 47° | 69° | — | — |
| 1983 | 62° | 49° | 55° | — | — |
| 1982 | 66° | 36° | 51° | — | — |
| 1981 | 62° | 48° | 55° | 0.48" | — |
| 1980 | 73° | 43° | 58° | — | — |
| 1979 | 64° | 41° | 53° | 0.25" | — |
| 1978 | 70° | 52° | 61° | — | — |
| 1977 | 72° | 40° | 56° | — | — |
| 1976 | 77° | 43° | 60° | — | — |
| 1975 | 74° | 46° | 60° | — | — |
| 1974 | 59° | 51° | 55° | — | — |
| 1973 | 57° | 40° | 48° | 1.45" | — |
| 1972 | 76° | 52° | 64° | — | — |
| 1971 | 77° | 39° | 58° | — | — |
49 years of data from DEVORE CALIFORNIA