Weather on December 15
Riverside, CA
55 Years of Data
Avg High
67°F
Avg Low
41°F
Warmest
1980
68°F avg
Coldest
1987
41°F avg
About This Date
December 15th in Riverside, CA typically brings mild winter weather, with average highs around 67°F and lows near 41°F — a 26°F daily swing. Over 55 years of records, the warmest December 15th was in 1980 (68°F average), while the coldest was 1987 (41°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 13% of December 15th dates historically, with the wettest December 15th recording 2.79" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 15th in Riverside, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 45° | 61° | — | — |
| 2024 | 67° | 45° | 56° | — | — |
| 2023 | 77° | 47° | 62° | — | — |
| 2022 | 63° | 37° | 50° | — | — |
| 2021 | 56° | 34° | 45° | — | — |
| 2020 | 68° | 42° | 55° | — | — |
| 2019 | 61° | 44° | 52° | — | — |
| 2018 | 76° | 44° | 60° | — | — |
| 2017 | 81° | 49° | 65° | — | — |
| 2016 | 68° | 51° | 60° | 0.76" | — |
| 2015 | 60° | 36° | 48° | — | — |
| 2014 | 67° | 41° | 54° | — | — |
| 2013 | 81° | 45° | 63° | — | — |
| 2012 | 60° | 41° | 51° | 0.2" | — |
| 2011 | 64° | 38° | 51° | 1.27" | — |
| 2010 | 57° | 51° | 54° | 0.03" | — |
| 2009 | 71° | 41° | 56° | — | — |
| 2008 | 50° | 44° | 47° | 2.79" | — |
| 2007 | 65° | 39° | 52° | — | — |
| 2006 | 74° | 46° | 60° | — | — |
| 2005 | 68° | 40° | 54° | — | — |
| 2004 | 79° | 45° | 62° | — | — |
| 2003 | 69° | 35° | 52° | 0.03" | — |
| 2002 | 69° | 49° | 59° | — | — |
| 2001 | 58° | 35° | 46° | — | — |
| 2000 | 67° | 42° | 54° | — | — |
| 1999 | 74° | 37° | 55° | — | — |
| 1998 | 78° | 44° | 61° | — | — |
| 1997 | 70° | 41° | 55° | — | — |
| 1996 | 65° | 53° | 59° | — | — |
| 1995 | 70° | 44° | 57° | — | — |
| 1994 | 63° | 35° | 49° | — | — |
| 1993 | 56° | 38° | 47° | — | — |
| 1992 | 60° | 33° | 47° | — | — |
| 1991 | 78° | 42° | 60° | — | — |
| 1990 | 60° | 33° | 47° | — | — |
| 1989 | 68° | 39° | 54° | — | — |
| 1988 | 53° | 45° | 49° | 0.79" | — |
| 1987coldest | 54° | 28° | 41° | — | — |
| 1986 | 67° | 44° | 55° | — | — |
| 1985 | 72° | 40° | 56° | — | — |
| 1984 | 56° | 34° | 45° | — | — |
| 1983 | 71° | 45° | 58° | — | — |
| 1982 | 67° | 40° | 53° | — | — |
| 1981 | 72° | 45° | 58° | — | — |
| 1980warmest | 83° | 53° | 68° | — | — |
| 1979 | 77° | 38° | 57° | — | — |
| 1978 | 75° | 40° | 57° | — | — |
| 1977 | 78° | 45° | 61° | — | — |
| 1976 | 77° | 45° | 61° | — | — |
| 1975 | 61° | 35° | 48° | — | — |
| 1974 | 70° | 40° | 55° | — | — |
| 1973 | 61° | 40° | 50° | — | — |
| 1972 | 65° | 35° | 50° | — | — |
| 1971 | 56° | 33° | 44° | — | — |
55 years of data from RIVERSIDE CITRUS EXP