Weather on December 9
Mission Viejo, CA
55 Years of Data
Avg High
68°F
Avg Low
48°F
Warmest
2025
74°F avg
Coldest
1972
44°F avg
About This Date
December 9th in Mission Viejo, CA typically brings mild winter weather, with average highs around 68°F and lows near 48°F. Over 55 years of records, the warmest December 9th was in 2025 (74°F average), while the coldest was 1972 (44°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 5% of December 9th dates historically, with the wettest December 9th recording 1.24" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Mission Viejo, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 85° | 64° | 74° | — | — |
| 2024 | 68° | 44° | 56° | — | — |
| 2023 | 70° | 52° | 61° | — | — |
| 2022 | 62° | 44° | 53° | — | — |
| 2021 | 55° | 49° | 52° | — | — |
| 2020 | 74° | 52° | 63° | — | — |
| 2019 | 66° | 49° | 57° | — | — |
| 2018 | 72° | 55° | 63° | — | — |
| 2017 | 83° | 63° | 73° | — | — |
| 2016 | 66° | 50° | 58° | — | — |
| 2015 | 77° | 57° | 67° | — | — |
| 2014 | 75° | 54° | 64° | — | — |
| 2013 | 60° | 42° | 51° | — | — |
| 2012 | 68° | 47° | 57° | — | — |
| 2011 | 71° | 49° | 60° | — | — |
| 2010 | 71° | 51° | 61° | — | — |
| 2009 | 59° | 41° | 50° | — | — |
| 2008 | 72° | 44° | 58° | — | — |
| 2007 | 60° | 42° | 51° | — | — |
| 2006 | 69° | 47° | 58° | — | — |
| 2005 | 75° | 53° | 64° | — | — |
| 2004 | 68° | 47° | 57° | — | — |
| 2003 | 70° | 48° | 59° | — | — |
| 2002 | 67° | 49° | 58° | — | — |
| 2001 | 64° | 43° | 53° | — | — |
| 2000 | 68° | 53° | 61° | — | — |
| 1999 | 68° | 50° | 59° | — | — |
| 1998 | 63° | 42° | 52° | — | — |
| 1997 | 63° | 41° | 52° | — | — |
| 1996 | 59° | 50° | 55° | 1.24" | — |
| 1995 | 67° | 51° | 59° | — | — |
| 1994 | 65° | 43° | 54° | — | — |
| 1993 | 69° | 49° | 59° | — | — |
| 1992 | 64° | 48° | 56° | — | — |
| 1991 | 70° | 51° | 60° | — | — |
| 1990 | 76° | 51° | 63° | — | — |
| 1989 | 72° | 49° | 60° | — | — |
| 1988 | 75° | 55° | 65° | — | — |
| 1987 | 65° | 45° | 55° | — | — |
| 1986 | 62° | 43° | 52° | — | — |
| 1985 | 63° | 42° | 52° | — | — |
| 1984 | 69° | 48° | 59° | — | — |
| 1983 | 62° | 48° | 55° | 0.36" | — |
| 1982 | 68° | 56° | 62° | 0.03" | — |
| 1981 | 75° | 48° | 62° | — | — |
| 1980 | 69° | 47° | 58° | — | — |
| 1979 | 70° | 49° | 59° | — | — |
| 1978 | 65° | 38° | 51° | — | — |
| 1977 | 70° | 52° | 61° | — | — |
| 1976 | 66° | 43° | 54° | — | — |
| 1975 | 84° | 52° | 68° | — | — |
| 1974 | 68° | 50° | 59° | — | — |
| 1973 | 82° | 50° | 66° | — | — |
| 1972coldest | 51° | 37° | 44° | — | — |
| 1971 | 60° | 40° | 50° | — | — |
55 years of data from EL TORO MCAS