Weather on December 8
Rialto, CA
55 Years of Data
Avg High
66°F
Avg Low
45°F
Warmest
1975
72°F avg
Coldest
2009
38°F avg
About This Date
December 8th in Rialto, CA typically brings mild winter weather, with average highs around 66°F and lows near 45°F. Over 47 years of records, the warmest December 8th was in 1975 (72°F average), while the coldest was 2009 (38°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 6% of December 8th dates historically, with the wettest December 8th recording 1.17" of rain.
Planning for December 8th in Rialto, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 46° | 63° | — | — |
| 2016 | 63° | 46° | 54° | — | — |
| 2015 | 82° | 62° | 72° | — | — |
| 2014 | 73° | 57° | 65° | — | — |
| 2013 | 48° | 37° | 43° | — | — |
| 2012 | 70° | 50° | 60° | — | — |
| 2011 | 67° | 47° | 57° | — | — |
| 2010 | 73° | 53° | 63° | — | — |
| 2009coldest | 46° | 31° | 38° | — | — |
| 2008 | 54° | 45° | 49° | — | — |
| 2007 | 47° | 40° | 43° | — | — |
| 2006 | 73° | 50° | 62° | — | — |
| 2005 | 68° | 50° | 59° | — | — |
| 2004 | 61° | 44° | 52° | — | — |
| 2003 | 64° | 43° | 53° | — | — |
| 2002 | 76° | 50° | 63° | — | — |
| 2001 | 70° | 46° | 58° | — | — |
| 2000 | 54° | 47° | 50° | — | — |
| 1999 | 62° | 46° | 54° | — | — |
| 1998 | 61° | 42° | 51° | — | — |
| 1997 | 52° | 37° | 44° | — | — |
| 1996 | 83° | 52° | 67° | — | — |
| 1995 | 77° | 55° | 66° | — | — |
| 1994 | 52° | 43° | 47° | — | — |
| 1993 | 70° | 44° | 57° | — | — |
| 1992 | 55° | 37° | 46° | — | — |
| 1991 | 58° | 46° | 52° | — | — |
| 1990 | 69° | 55° | 62° | — | — |
| 1989 | 80° | 44° | 62° | — | — |
| 1988 | 66° | 55° | 61° | — | — |
| 1987 | 63° | 40° | 51° | — | — |
| 1986 | 67° | 42° | 54° | — | — |
| 1985 | 55° | 40° | 47° | — | — |
| 1984 | 67° | 47° | 57° | 1.17" | — |
| 1983 | 80° | 42° | 61° | — | — |
| 1982 | 59° | 41° | 50° | 0.1" | — |
| 1981 | 84° | 46° | 65° | — | — |
| 1980 | 63° | 42° | 52° | — | — |
| 1979 | 84° | 46° | 65° | — | — |
| 1978 | 52° | 29° | 40° | — | — |
| 1977 | 73° | 40° | 56° | — | — |
| 1976 | 81° | 38° | 59° | — | — |
| 1975warmest | 78° | 67° | 72° | — | — |
| 1974 | 67° | 49° | 58° | — | — |
| 1973 | 81° | 42° | 61° | — | — |
| 1972 | 50° | 41° | 46° | 0.89" | — |
| 1971 | 53° | 35° | 44° | — | — |
47 years of data from FONTANA 5 N