Weather on December 9
Riverside, CA
55 Years of Data
Avg High
69°F
Avg Low
42°F
Warmest
1975
69°F avg
Coldest
1972
40°F avg
About This Date
December 9th in Riverside, CA typically brings mild winter weather, with average highs around 69°F and lows near 42°F — a 27°F daily swing. Over 55 years of records, the warmest December 9th was in 1975 (69°F average), while the coldest was 1972 (40°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 9th dates historically, with the wettest December 9th recording 1.27" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Riverside, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 50° | 66° | — | — |
| 2024 | 74° | 44° | 59° | — | — |
| 2023 | 68° | 54° | 61° | — | — |
| 2022 | 63° | 38° | 50° | — | — |
| 2021 | 56° | 47° | 51° | 0.28" | — |
| 2020 | 76° | 47° | 61° | — | — |
| 2019 | 66° | 48° | 57° | — | — |
| 2018 | 72° | 47° | 59° | — | — |
| 2017 | 81° | 47° | 64° | — | — |
| 2016 | 65° | 44° | 54° | — | — |
| 2015 | 79° | 50° | 64° | — | — |
| 2014 | 83° | 52° | 67° | — | — |
| 2013 | 58° | 39° | 48° | — | — |
| 2012 | 71° | 43° | 57° | — | — |
| 2011 | 80° | 37° | 59° | — | — |
| 2010 | 72° | 44° | 58° | — | — |
| 2009 | 57° | 37° | 47° | — | — |
| 2008 | 70° | 44° | 57° | — | — |
| 2007 | 58° | 44° | 51° | 0.18" | — |
| 2006 | 71° | 45° | 58° | — | — |
| 2005 | 71° | 49° | 60° | 0.18" | — |
| 2004 | 77° | 44° | 61° | — | — |
| 2003 | 74° | 36° | 55° | — | — |
| 2002 | 71° | 44° | 58° | — | — |
| 2001 | 66° | 38° | 52° | — | — |
| 2000 | 69° | 56° | 62° | — | — |
| 1999 | 69° | 38° | 53° | — | — |
| 1998 | 63° | 45° | 54° | — | — |
| 1997 | 59° | 35° | 47° | — | — |
| 1996 | 61° | 46° | 53° | 1.27" | — |
| 1995 | 81° | 43° | 62° | — | — |
| 1994 | 69° | 32° | 51° | — | — |
| 1993 | 64° | 39° | 52° | — | — |
| 1992 | 60° | 38° | 49° | — | — |
| 1991 | 74° | 33° | 53° | — | — |
| 1990 | 83° | 40° | 61° | — | — |
| 1989 | 74° | 41° | 57° | — | — |
| 1988 | 72° | 50° | 61° | — | — |
| 1987 | 68° | 41° | 55° | — | — |
| 1986 | 64° | 38° | 51° | — | — |
| 1985 | 59° | 35° | 47° | — | — |
| 1984 | 68° | 43° | 55° | — | — |
| 1983 | 64° | 45° | 54° | 0.03" | — |
| 1982 | 57° | 43° | 50° | — | — |
| 1981 | 74° | 46° | 60° | — | — |
| 1980 | 66° | 37° | 52° | — | — |
| 1979 | 77° | 44° | 61° | — | — |
| 1978 | 51° | 29° | 40° | — | — |
| 1977 | 67° | 41° | 54° | — | — |
| 1976 | 78° | 35° | 57° | — | — |
| 1975warmest | 85° | 53° | 69° | — | — |
| 1974 | 69° | 40° | 54° | — | — |
| 1973 | 81° | 43° | 62° | — | — |
| 1972coldest | 50° | 30° | 40° | 0.33" | — |
| 1971 | 57° | 34° | 45° | — | — |
55 years of data from RIVERSIDE CITRUS EXP