Weather on December 16
Simi Valley, CA
55 Years of Data
Avg High
65°F
Avg Low
51°F
Warmest
2013
74°F avg
Coldest
2008
44°F avg
About This Date
December 16th in Simi Valley, CA typically brings mild winter weather, with average highs around 65°F and lows near 51°F. Over 31 years of records, the warmest December 16th was in 2013 (74°F average), while the coldest was 2008 (44°F) — a 30°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for December 16th in Simi Valley, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 64° | 73° | — | — |
| 2024 | 70° | 56° | 63° | — | — |
| 2023 | 76° | 59° | 67° | — | — |
| 2022 | 63° | 49° | 56° | — | — |
| 2021 | 50° | 42° | 46° | — | — |
| 2020 | 72° | 54° | 63° | — | — |
| 2019 | 57° | 47° | 52° | — | — |
| 2018 | 69° | 53° | 61° | — | — |
| 2017 | 68° | 51° | 60° | — | — |
| 2016 | 56° | 42° | 49° | — | — |
| 2015 | 59° | 44° | 52° | — | — |
| 2014 | 54° | 48° | 51° | — | — |
| 2013warmest | 84° | 64° | 74° | — | — |
| 2012 | 49° | 42° | 45° | — | — |
| 2011 | 66° | 50° | 58° | — | — |
| 2010 | 59° | 49° | 54° | — | — |
| 2009 | 72° | 51° | 61° | — | — |
| 2008coldest | 52° | 36° | 44° | — | — |
| 2007 | 66° | 43° | 54° | — | — |
| 2006 | 55° | 41° | 48° | — | — |
| 2005 | 59° | 39° | 49° | — | — |
| 2004 | 68° | 63° | 65° | — | — |
| 2003 | 63° | 52° | 57° | — | — |
| 2002 | 57° | 50° | 54° | — | — |
| 2001 | 63° | 48° | 55° | — | — |
| 2000 | 74° | 56° | 65° | — | — |
| 1999 | 79° | 58° | 68° | — | — |
| 1998 | 77° | 67° | 72° | — | — |
| 1997 | 70° | 54° | 62° | — | — |
| 1996 | 77° | 52° | 64° | — | — |
| 1995 | 55° | 46° | 51° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA