Weather on December 23
Rialto, CA
55 Years of Data
Avg High
63°F
Avg Low
45°F
Warmest
2005
66°F avg
Coldest
1990
37°F avg
About This Date
December 23rd in Rialto, CA typically brings mild winter weather, with average highs around 63°F and lows near 45°F. Over 47 years of records, the warmest December 23rd was in 2005 (66°F average), while the coldest was 1990 (37°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 9% of December 23rd dates historically, with the wettest December 23rd recording 2.77" of rain.
Planning for December 23rd in Rialto, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 50° | 58° | — | — |
| 2016 | 54° | 45° | 49° | — | — |
| 2015 | 61° | 46° | 53° | — | — |
| 2014 | 74° | 59° | 66° | — | — |
| 2013 | 70° | 58° | 64° | — | — |
| 2012 | 53° | 45° | 49° | — | — |
| 2011 | 62° | 49° | 55° | — | — |
| 2010 | 54° | 43° | 48° | — | — |
| 2009 | 58° | 41° | 49° | — | — |
| 2008 | 47° | 41° | 44° | — | — |
| 2007 | 67° | 46° | 56° | — | — |
| 2006 | 64° | 51° | 58° | — | — |
| 2005warmest | 78° | 54° | 66° | — | — |
| 2004 | 54° | 47° | 50° | — | — |
| 2003 | 59° | 47° | 53° | — | — |
| 2002 | 56° | 40° | 48° | — | — |
| 2001 | 63° | 39° | 51° | — | — |
| 2000 | 77° | 48° | 63° | — | — |
| 1999 | 67° | 55° | 61° | — | — |
| 1998 | 52° | 38° | 45° | — | — |
| 1997 | 63° | 40° | 51° | — | — |
| 1996 | 66° | 50° | 58° | — | — |
| 1995 | 48° | 36° | 42° | — | — |
| 1994 | 57° | 51° | 54° | — | — |
| 1993 | 59° | 52° | 55° | — | — |
| 1992 | 62° | 52° | 57° | — | — |
| 1991 | 61° | 49° | 55° | — | — |
| 1990coldest | 43° | 32° | 37° | — | — |
| 1989 | 71° | 44° | 58° | — | — |
| 1988 | 57° | 42° | 50° | 0.2" | — |
| 1987 | 55° | 43° | 49° | 0.66" | — |
| 1986 | 63° | 47° | 55° | — | — |
| 1985 | 76° | 42° | 59° | — | — |
| 1984 | 70° | 36° | 53° | — | — |
| 1983 | 63° | 45° | 54° | — | — |
| 1982 | 60° | 47° | 53° | 2.77" | — |
| 1981 | 66° | 28° | 47° | — | — |
| 1980 | 82° | 48° | 65° | — | — |
| 1979 | 61° | 33° | 47° | — | — |
| 1978 | 73° | 35° | 54° | — | — |
| 1977 | 65° | 52° | 58° | 0.13" | — |
| 1976 | 67° | 36° | 51° | — | — |
| 1975 | 62° | 52° | 57° | — | — |
| 1974 | 60° | 39° | 50° | — | — |
| 1973 | 62° | 36° | 49° | — | — |
| 1972 | 77° | 42° | 60° | — | — |
| 1971 | 60° | 51° | 56° | — | — |
47 years of data from FONTANA 5 N