Weather on October 18
Rialto, CA
55 Years of Data
Avg High
80°F
Avg Low
55°F
Warmest
2003
83°F avg
Coldest
2005
53°F avg
About This Date
October 18th in Rialto, CA typically brings warm fall weather, with average highs around 80°F and lows near 55°F — a 25°F daily swing. Over 48 years of records, the warmest October 18th was in 2003 (83°F average), while the coldest was 2005 (53°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 2% of October 18th dates historically.
Planning for October 18th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 54° | 70° | — | — |
| 2017 | 88° | 65° | 76° | — | — |
| 2016 | 76° | 57° | 66° | — | — |
| 2015 | 74° | 62° | 68° | — | — |
| 2014 | 75° | 56° | 65° | — | — |
| 2013 | 84° | 61° | 72° | — | — |
| 2012 | 78° | 58° | 68° | — | — |
| 2011 | 91° | 65° | 78° | — | — |
| 2010 | 63° | 55° | 59° | — | — |
| 2009 | 86° | 59° | 73° | — | — |
| 2008 | 83° | 61° | 72° | — | — |
| 2007 | 84° | 50° | 67° | — | — |
| 2006 | 72° | 58° | 65° | — | — |
| 2005coldest | 56° | 51° | 53° | — | — |
| 2004 | 60° | 54° | 57° | — | — |
| 2003warmest | 97° | 70° | 83° | — | — |
| 2002 | 71° | 47° | 59° | — | — |
| 2001 | 88° | 57° | 72° | — | — |
| 2000 | 79° | 54° | 66° | — | — |
| 1999 | 90° | 65° | 77° | — | — |
| 1998 | 83° | 60° | 71° | — | — |
| 1997 | 89° | 57° | 73° | — | — |
| 1996 | 85° | 56° | 70° | — | — |
| 1995 | 91° | 58° | 74° | — | — |
| 1994 | 76° | 47° | 61° | — | — |
| 1993 | 77° | 46° | 62° | — | — |
| 1992 | 78° | 54° | 66° | — | — |
| 1991 | 97° | 64° | 80° | — | — |
| 1990 | 80° | 56° | 68° | — | — |
| 1989 | 92° | 53° | 72° | — | — |
| 1988 | 83° | 55° | 69° | — | — |
| 1987 | 70° | 58° | 64° | — | — |
| 1986 | 68° | 50° | 59° | — | — |
| 1985 | 78° | 56° | 67° | — | — |
| 1984 | 75° | 45° | 60° | — | — |
| 1983 | 81° | 53° | 67° | — | — |
| 1982 | 85° | 47° | 66° | — | — |
| 1981 | 89° | 52° | 70° | — | — |
| 1980 | 83° | 46° | 64° | — | — |
| 1979 | 70° | 58° | 64° | — | — |
| 1978 | 90° | 50° | 70° | — | — |
| 1977 | 83° | 52° | 67° | — | — |
| 1976 | 77° | 62° | 70° | — | — |
| 1975 | 78° | 48° | 63° | — | — |
| 1974 | 92° | 56° | 74° | — | — |
| 1973 | 94° | 57° | 75° | — | — |
| 1972 | 68° | 55° | 62° | — | — |
| 1971 | 69° | 48° | 59° | 0.05" | — |
48 years of data from DEVORE CALIFORNIA