Weather on October 20
Rialto, CA
55 Years of Data
Avg High
79°F
Avg Low
56°F
Warmest
2003
86°F avg
Coldest
2004
54°F avg
About This Date
October 20th in Rialto, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 56°F. Over 48 years of records, the warmest October 20th was in 2003 (86°F average), while the coldest was 2004 (54°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 8% of October 20th dates historically, with the wettest October 20th recording 5.87" of rain.
Planning for October 20th in Rialto, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 50° | 69° | — | — |
| 2017 | 64° | 56° | 60° | — | — |
| 2016 | 86° | 70° | 78° | — | — |
| 2015 | 77° | 54° | 65° | — | — |
| 2014 | 77° | 58° | 67° | — | — |
| 2013 | 81° | 59° | 70° | — | — |
| 2012 | 72° | 57° | 64° | — | — |
| 2011 | 76° | 49° | 62° | — | — |
| 2010 | 63° | 56° | 59° | — | — |
| 2009 | 76° | 52° | 64° | — | — |
| 2008 | 77° | 53° | 65° | — | — |
| 2007 | 79° | 58° | 68° | — | — |
| 2006 | 85° | 60° | 72° | — | — |
| 2005 | 83° | 53° | 68° | — | — |
| 2004coldest | 57° | 51° | 54° | — | — |
| 2003warmest | 100° | 71° | 86° | — | — |
| 2002 | 80° | 52° | 66° | — | — |
| 2001 | 85° | 57° | 71° | — | — |
| 2000 | 88° | 55° | 71° | — | — |
| 1999 | 93° | 68° | 81° | — | — |
| 1998 | 86° | 64° | 75° | — | — |
| 1997 | 69° | 56° | 62° | — | — |
| 1996 | 75° | 49° | 62° | — | — |
| 1995 | 90° | 60° | 75° | — | — |
| 1994 | 78° | 47° | 62° | — | — |
| 1993 | 88° | 62° | 75° | — | — |
| 1992 | 81° | 56° | 68° | — | — |
| 1991 | 90° | 69° | 79° | — | — |
| 1990 | 78° | 52° | 65° | — | — |
| 1989 | 73° | 59° | 66° | — | — |
| 1988 | 77° | 60° | 69° | — | — |
| 1987 | 74° | 51° | 62° | — | — |
| 1986 | 78° | 46° | 62° | — | — |
| 1985 | 80° | 53° | 67° | — | — |
| 1984 | 72° | 57° | 64° | — | — |
| 1983 | 83° | 53° | 68° | — | — |
| 1982 | 84° | 53° | 69° | — | — |
| 1981 | 89° | 54° | 71° | — | — |
| 1980 | 89° | 50° | 70° | — | — |
| 1979 | 66° | 59° | 63° | 5.87" | — |
| 1978 | 80° | 60° | 70° | 0.48" | — |
| 1977 | 65° | 54° | 59° | 0.08" | — |
| 1976 | 80° | 59° | 70° | — | — |
| 1975 | 78° | 55° | 67° | — | — |
| 1974 | 75° | 51° | 63° | — | — |
| 1973 | 84° | 53° | 69° | — | — |
| 1972 | 59° | 50° | 55° | 0.38" | — |
| 1971 | 85° | 43° | 64° | — | — |
48 years of data from DEVORE CALIFORNIA