Weather on December 18
Riverside, CA
55 Years of Data
Avg High
67°F
Avg Low
42°F
Warmest
2024
69°F avg
Coldest
2006
44°F avg
About This Date
December 18th in Riverside, CA typically brings mild winter weather, with average highs around 67°F and lows near 42°F — a 25°F daily swing. Over 55 years of records, the warmest December 18th was in 2024 (69°F average), while the coldest was 2006 (44°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 18th dates historically, with the wettest December 18th recording 1.91" 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 18th in Riverside, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 47° | 63° | — | — |
| 2024warmest | 83° | 55° | 69° | — | — |
| 2023 | 73° | 53° | 63° | — | — |
| 2022 | 64° | 37° | 51° | — | — |
| 2021 | 70° | 42° | 56° | — | — |
| 2020 | 69° | 41° | 55° | — | — |
| 2019 | 62° | 36° | 49° | — | — |
| 2018 | 66° | 48° | 57° | — | — |
| 2017 | 71° | 44° | 58° | — | — |
| 2016 | 61° | 36° | 48° | — | — |
| 2015 | 75° | 39° | 57° | — | — |
| 2014 | 66° | 43° | 54° | — | — |
| 2013 | 72° | 53° | 62° | — | — |
| 2012 | 60° | 45° | 52° | — | — |
| 2011 | 68° | 38° | 53° | — | — |
| 2010 | 61° | 54° | 57° | 0.56" | — |
| 2009 | 80° | 47° | 63° | — | — |
| 2008 | 59° | 38° | 48° | — | — |
| 2007 | 58° | 44° | 51° | 0.38" | — |
| 2006coldest | 55° | 33° | 44° | — | — |
| 2005 | 66° | 46° | 56° | — | — |
| 2004 | 83° | 43° | 63° | — | — |
| 2003 | 81° | 48° | 64° | — | — |
| 2002 | 59° | 37° | 48° | — | — |
| 2001 | 76° | 33° | 54° | — | — |
| 2000 | 74° | 44° | 59° | — | — |
| 1999 | 78° | 46° | 62° | — | — |
| 1998 | 60° | 47° | 53° | — | — |
| 1997 | 63° | 41° | 52° | 0.2" | — |
| 1996 | 66° | 40° | 53° | — | — |
| 1995 | 67° | 34° | 50° | — | — |
| 1994 | 70° | 36° | 53° | — | — |
| 1993 | 66° | 34° | 50° | — | — |
| 1992 | 58° | 41° | 49° | 0.1" | — |
| 1991 | 60° | 52° | 56° | — | — |
| 1990 | 60° | 32° | 46° | — | — |
| 1989 | 59° | 36° | 47° | — | — |
| 1988 | 53° | 43° | 48° | 0.38" | — |
| 1987 | 62° | 39° | 51° | — | — |
| 1986 | 67° | 41° | 54° | — | — |
| 1985 | 79° | 42° | 60° | — | — |
| 1984 | 54° | 41° | 47° | 1.91" | — |
| 1983 | 66° | 49° | 57° | — | — |
| 1982 | 71° | 36° | 53° | — | — |
| 1981 | 70° | 45° | 57° | — | — |
| 1980 | 59° | 41° | 50° | — | — |
| 1979 | 81° | 43° | 62° | — | — |
| 1978 | 57° | 44° | 51° | 1.55" | — |
| 1977 | 63° | 52° | 57° | 1.17" | — |
| 1976 | 76° | 39° | 57° | — | — |
| 1975 | 72° | 38° | 55° | — | — |
| 1974 | 74° | 39° | 56° | — | — |
| 1973 | 74° | 40° | 57° | — | — |
| 1972 | 69° | 44° | 57° | — | — |
| 1971 | 65° | 47° | 56° | — | — |
55 years of data from RIVERSIDE CITRUS EXP