Weather on October 18
Rialto, CA
55 Years of Data
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.
| 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" | — |
Rialto, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Rialto, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rialto, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Rialto, CA
Rialto, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.