Weather on October 17
Rialto, CA
55 Years of Data
Avg High
81°F
Avg Low
55°F
Warmest
2017
84°F avg
Coldest
1971
50°F avg
About This Date
October 17th in Rialto, CA typically brings warm fall weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 48 years of records, the warmest October 17th was in 2017 (84°F average), while the coldest was 1971 (50°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 4% of October 17th dates historically, with the wettest October 17th recording 0.71" of rain.
Planning for October 17th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 52° | 67° | — | — |
| 2017warmest | 94° | 74° | 84° | — | — |
| 2016 | 64° | 56° | 60° | — | — |
| 2015 | 81° | 63° | 72° | — | — |
| 2014 | 72° | 55° | 63° | — | — |
| 2013 | 79° | 56° | 67° | — | — |
| 2012 | 95° | 72° | 83° | — | — |
| 2011 | 86° | 63° | 74° | — | — |
| 2010 | 60° | 56° | 58° | — | — |
| 2009 | 93° | 67° | 80° | — | — |
| 2008 | 91° | 65° | 78° | — | — |
| 2007 | 65° | 51° | 58° | — | — |
| 2006 | 67° | 52° | 59° | — | — |
| 2005 | 69° | 54° | 61° | — | — |
| 2004 | 64° | 54° | 59° | — | — |
| 2003 | 98° | 65° | 81° | — | — |
| 2002 | 69° | 49° | 59° | — | — |
| 2001 | 87° | 56° | 71° | — | — |
| 2000 | 91° | 59° | 75° | — | — |
| 1999 | 80° | 63° | 71° | — | — |
| 1998 | 76° | 57° | 66° | — | — |
| 1997 | 88° | 62° | 75° | — | — |
| 1996 | 92° | 49° | 70° | — | — |
| 1995 | 91° | 52° | 71° | — | — |
| 1994 | 75° | 45° | 60° | — | — |
| 1993 | 67° | 52° | 59° | — | — |
| 1992 | 82° | 55° | 69° | — | — |
| 1991 | 87° | 62° | 75° | — | — |
| 1990 | 84° | 55° | 70° | — | — |
| 1989 | 92° | 53° | 72° | — | — |
| 1988 | 96° | 58° | 77° | — | — |
| 1987 | 84° | 55° | 70° | — | — |
| 1986 | 68° | 57° | 63° | — | — |
| 1985 | 74° | 53° | 63° | — | — |
| 1984 | 71° | 53° | 62° | 0.61" | — |
| 1983 | 79° | 60° | 69° | — | — |
| 1982 | 87° | 53° | 70° | — | — |
| 1981 | 82° | 40° | 61° | — | — |
| 1980 | 76° | 46° | 61° | — | — |
| 1979 | 74° | 56° | 65° | — | — |
| 1978 | 83° | 49° | 66° | — | — |
| 1977 | 92° | 54° | 73° | — | — |
| 1976 | 88° | 50° | 69° | — | — |
| 1975 | 88° | 48° | 68° | — | — |
| 1974 | 101° | 55° | 78° | — | — |
| 1973 | 95° | 54° | 74° | — | — |
| 1972 | 72° | 53° | 62° | — | — |
| 1971coldest | 61° | 39° | 50° | 0.71" | — |
48 years of data from DEVORE CALIFORNIA