Weather on December 21
Moreno Valley, CA
55 Years of Data
Avg High
66°F
Avg Low
38°F
Warmest
2005
70°F avg
Coldest
1990
37°F avg
About This Date
December 21st in Moreno Valley, CA typically brings mild winter weather, with average highs around 66°F and lows near 38°F — a 28°F daily swing. Over 55 years of records, the warmest December 21st was in 2005 (70°F average), while the coldest was 1990 (37°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 15% of December 21st dates historically, with the wettest December 21st recording 1.6" 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 21st in Moreno Valley, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 39° | 58° | — | — |
| 2024 | 73° | 33° | 53° | — | — |
| 2023 | 67° | 47° | 57° | — | — |
| 2022 | 72° | 32° | 52° | — | — |
| 2021 | 68° | 41° | 55° | — | — |
| 2020 | 82° | 34° | 58° | — | — |
| 2019 | 69° | 44° | 57° | — | — |
| 2018 | 69° | 40° | 54° | — | — |
| 2017 | 62° | 38° | 50° | — | — |
| 2016 | 62° | 49° | 55° | — | — |
| 2015 | 57° | 31° | 44° | 0.03" | — |
| 2014 | 65° | 40° | 52° | — | — |
| 2013 | 59° | 36° | 47° | — | — |
| 2012 | 67° | 27° | 47° | — | — |
| 2011 | 63° | 25° | 44° | — | — |
| 2010 | 54° | 48° | 51° | — | — |
| 2009 | 61° | 47° | 54° | — | — |
| 2008 | 65° | 40° | 52° | — | — |
| 2007 | 54° | 36° | 45° | — | — |
| 2006 | 70° | 32° | 51° | — | — |
| 2005warmest | 90° | 51° | 70° | — | — |
| 2004 | 72° | 41° | 56° | — | — |
| 2003 | 64° | 41° | 53° | — | — |
| 2002 | 52° | 38° | 45° | — | — |
| 2001 | 48° | 39° | 44° | — | — |
| 2000 | 84° | 40° | 62° | — | — |
| 1999 | 73° | 43° | 58° | — | — |
| 1998 | 54° | 31° | 42° | 0.13" | — |
| 1997 | 53° | 37° | 45° | 0.64" | — |
| 1996 | 58° | 37° | 47° | — | — |
| 1995 | 62° | 36° | 49° | — | — |
| 1994 | 76° | 42° | 59° | — | — |
| 1993 | 67° | 33° | 50° | — | — |
| 1992 | 62° | 30° | 46° | — | — |
| 1991 | 71° | 41° | 56° | — | — |
| 1990coldest | 45° | 29° | 37° | 0.03" | — |
| 1989 | 67° | 38° | 52° | — | — |
| 1988 | 61° | — | — | 1.6" | — |
| 1987 | 70° | 36° | 53° | — | — |
| 1986 | 75° | 42° | 59° | — | — |
| 1985 | 81° | 45° | 63° | — | — |
| 1984 | 60° | 35° | 48° | — | — |
| 1983 | 57° | 41° | 49° | — | — |
| 1982 | 64° | 36° | 50° | 0.08" | — |
| 1981 | 62° | 43° | 52° | — | — |
| 1980 | 75° | 41° | 58° | — | — |
| 1979 | 58° | 46° | 52° | 0.3" | — |
| 1978 | 64° | 33° | 49° | — | — |
| 1977 | 62° | 49° | 55° | 0.1" | — |
| 1976 | 69° | 39° | 54° | — | — |
| 1975 | 64° | 36° | 50° | — | — |
| 1974 | 72° | 42° | 57° | — | — |
| 1973 | 65° | 35° | 50° | — | — |
| 1972 | 75° | 38° | 56° | — | — |
| 1971 | 59° | 30° | 45° | — | — |
55 years of data from MARCH AFB