Weather on December 4
Rialto, CA
55 Years of Data
Avg High
68°F
Avg Low
45°F
Warmest
2003
70°F avg
Coldest
1992
43°F avg
About This Date
December 4th in Rialto, CA typically brings mild winter weather, with average highs around 68°F and lows near 45°F. Over 47 years of records, the warmest December 4th was in 2003 (70°F average), while the coldest was 1992 (43°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 6% of December 4th dates historically, with the wettest December 4th recording 4.57" of rain.
Planning for December 4th in Rialto, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 42° | 55° | — | — |
| 2016 | 73° | 53° | 63° | — | — |
| 2015 | 64° | 49° | 56° | — | — |
| 2014 | 62° | 51° | 57° | — | — |
| 2013 | 55° | 39° | 47° | — | — |
| 2012 | 73° | 48° | 61° | — | — |
| 2011 | 59° | 39° | 49° | — | — |
| 2010 | 64° | 47° | 55° | — | — |
| 2009 | 66° | 45° | 55° | — | — |
| 2008 | 72° | 42° | 57° | — | — |
| 2007 | 76° | 56° | 66° | — | — |
| 2006 | 65° | 51° | 58° | — | — |
| 2005 | 58° | 47° | 52° | — | — |
| 2004 | 62° | 41° | 52° | — | — |
| 2003warmest | 83° | 57° | 70° | — | — |
| 2002 | 75° | 44° | 60° | — | — |
| 2001 | 60° | 38° | 49° | — | — |
| 2000 | 73° | 55° | 64° | — | — |
| 1999 | 68° | 48° | 58° | — | — |
| 1998 | 58° | 40° | 49° | — | — |
| 1997 | 70° | 45° | 57° | — | — |
| 1996 | 76° | 46° | 61° | — | — |
| 1995 | 77° | 52° | 64° | — | — |
| 1994 | 63° | 47° | 55° | — | — |
| 1993 | 75° | 49° | 62° | — | — |
| 1992coldest | 47° | 39° | 43° | — | — |
| 1991 | 68° | 56° | 62° | — | — |
| 1990 | 70° | 52° | 61° | — | — |
| 1989 | 76° | 40° | 58° | — | — |
| 1988 | 74° | 41° | 57° | — | — |
| 1987 | 59° | 44° | 52° | — | — |
| 1986 | 69° | 44° | 57° | — | — |
| 1985 | 71° | 43° | 57° | — | — |
| 1984 | 63° | 40° | 51° | — | — |
| 1983 | 61° | 42° | 51° | — | — |
| 1982 | 75° | 40° | 57° | — | — |
| 1981 | 79° | 44° | 61° | — | — |
| 1980 | 57° | 49° | 53° | 1.4" | — |
| 1979 | 89° | 44° | 67° | — | — |
| 1978 | 69° | 36° | 52° | — | — |
| 1977 | 79° | 44° | 61° | — | — |
| 1976 | 73° | 37° | 55° | — | — |
| 1975 | 62° | 55° | 59° | — | — |
| 1974 | 61° | 51° | 56° | 4.57" | — |
| 1973 | 69° | 36° | 52° | — | — |
| 1972 | 54° | 47° | 50° | 2.62" | — |
| 1971 | 60° | 40° | 50° | — | — |
47 years of data from FONTANA 5 N