Weather on December 8
Simi Valley, CA
55 Years of Data
Avg High
66°F
Avg Low
51°F
Warmest
2015
75°F avg
Coldest
2009
42°F avg
About This Date
December 8th in Simi Valley, CA typically brings mild winter weather, with average highs around 66°F and lows near 51°F. Over 31 years of records, the warmest December 8th was in 2015 (75°F average), while the coldest was 2009 (42°F) — a 33°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for December 8th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 62° | 70° | — | — |
| 2024 | 68° | 52° | 60° | — | — |
| 2023 | 68° | 50° | 59° | — | — |
| 2022 | 59° | 44° | 52° | — | — |
| 2021 | 65° | 50° | 57° | — | — |
| 2020 | 77° | 65° | 71° | — | — |
| 2019 | 57° | 49° | 53° | — | — |
| 2018 | 66° | 51° | 59° | — | — |
| 2017 | 76° | 64° | 70° | — | — |
| 2016 | 62° | 50° | 56° | — | — |
| 2015warmest | 85° | 65° | 75° | — | — |
| 2014 | 76° | 59° | 67° | — | — |
| 2013 | 54° | 36° | 45° | — | — |
| 2012 | 70° | 52° | 61° | — | — |
| 2011 | 70° | 45° | 57° | — | — |
| 2010 | 71° | 51° | 61° | — | — |
| 2009coldest | 50° | 33° | 42° | — | — |
| 2008 | 59° | 50° | 55° | — | — |
| 2007 | 54° | 41° | 47° | — | — |
| 2006 | 75° | 55° | 65° | — | — |
| 2005 | 64° | 55° | 60° | — | — |
| 2004 | 55° | 46° | 51° | — | — |
| 2003 | 64° | 50° | 57° | — | — |
| 2002 | 73° | 50° | 62° | — | — |
| 2001 | 70° | 55° | 62° | — | — |
| 2000 | 56° | 49° | 52° | — | — |
| 1999 | 60° | 45° | 52° | — | — |
| 1998 | 63° | 44° | 53° | — | — |
| 1997 | 56° | 42° | 49° | — | — |
| 1996 | 79° | 55° | 67° | — | — |
| 1995 | 75° | 54° | 64° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA