Weather on May 12
Rialto, CA
55 Years of Data
About This Date
May 12th in Rialto, CA typically brings warm spring weather, with average highs around 81°F and lows near 54°F — a 27°F daily swing. Over 49 years of records, the warmest May 12th was in 2013 (82°F average), while the coldest was 1998 (45°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 12th dates historically.
Planning for May 12th in Rialto, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 93° | 61° | 77° | — | — |
| 2025 | 90° | 59° | 74° | — | — |
| 2017 | 76° | 52° | 64° | — | — |
| 2016 | 92° | 58° | 75° | — | — |
| 2015 | 72° | 50° | 61° | — | — |
| 2014 | 83° | 65° | 74° | — | — |
| 2013warmest | 96° | 68° | 82° | — | — |
| 2012 | 83° | 51° | 67° | — | — |
| 2011 | 84° | 51° | 68° | — | — |
| 2010 | 76° | 45° | 60° | — | — |
| 2009 | 75° | 53° | 64° | — | — |
| 2008 | 59° | 49° | 54° | — | — |
| 2007 | 77° | 48° | 63° | — | — |
| 2006 | 83° | 56° | 69° | — | — |
| 2005 | 83° | 56° | 69° | — | — |
| 2004 | 82° | 49° | 65° | — | — |
| 2003 | 84° | 52° | 68° | — | — |
| 2002 | 93° | 54° | 73° | — | — |
| 2001 | 79° | 57° | 68° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 85° | 53° | 69° | — | — |
| 1998coldest | 45° | 45° | 45° | — | — |
| 1997 | 91° | 55° | 73° | — | — |
| 1996 | 98° | 63° | 80° | — | — |
| 1995 | 60° | 49° | 54° | — | — |
| 1994 | 72° | 58° | 65° | 0.05" | — |
| 1993 | 72° | 50° | 61° | — | — |
| 1992 | 75° | 56° | 65° | — | — |
| 1991 | 74° | 45° | 59° | — | — |
| 1990 | 75° | 51° | 63° | — | — |
| 1989 | 67° | 52° | 59° | — | — |
| 1988 | 96° | 60° | 78° | — | — |
| 1987 | 92° | 60° | 76° | — | — |
| 1986 | 76° | 49° | 62° | — | — |
| 1985 | 73° | 53° | 63° | — | — |
| 1984 | 97° | 57° | 77° | — | — |
| 1983 | 81° | 46° | 63° | — | — |
| 1982 | 75° | 45° | 60° | — | — |
| 1981 | 82° | 59° | 71° | — | — |
| 1980 | 66° | 44° | 55° | — | — |
| 1979 | 95° | 51° | 73° | — | — |
| 1978 | 100° | 53° | 77° | — | — |
| 1977 | 66° | 50° | 58° | 0.41" | — |
| 1976 | 102° | 60° | 81° | — | — |
| 1975 | 98° | 56° | 77° | — | — |
| 1974 | 77° | 56° | 66° | — | — |
| 1973 | 77° | 56° | 66° | — | — |
| 1972 | 97° | 52° | 74° | — | — |
| 1971 | 80° | 55° | 68° | — | — |
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.