Weather on December 13
Simi Valley, CA
55 Years of Data
Avg High
65°F
Avg Low
48°F
Warmest
2017
74°F avg
Coldest
2022
48°F avg
About This Date
December 13th in Simi Valley, CA typically brings mild winter weather, with average highs around 65°F and lows near 48°F. Over 31 years of records, the warmest December 13th was in 2017 (74°F average), while the coldest was 2022 (48°F) — a 26°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for December 13th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 59° | 69° | — | — |
| 2024 | 61° | 46° | 53° | — | — |
| 2023 | 68° | 48° | 58° | — | — |
| 2022coldest | 55° | 41° | 48° | — | — |
| 2021 | 54° | 44° | 49° | — | — |
| 2020 | 65° | 50° | 57° | — | — |
| 2019 | 72° | 55° | 63° | — | — |
| 2018 | 71° | 55° | 63° | — | — |
| 2017warmest | 82° | 66° | 74° | — | — |
| 2016 | 64° | 50° | 57° | — | — |
| 2015 | 64° | 45° | 54° | — | — |
| 2014 | 60° | 47° | 53° | — | — |
| 2013 | 70° | 45° | 57° | — | — |
| 2012 | 58° | 42° | 50° | — | — |
| 2011 | 59° | 45° | 52° | — | — |
| 2010 | 81° | 55° | 68° | — | — |
| 2009 | 58° | 47° | 52° | — | — |
| 2008 | 57° | 41° | 49° | — | — |
| 2007 | 63° | 48° | 55° | — | — |
| 2006 | 73° | 61° | 67° | — | — |
| 2005 | 61° | 41° | 51° | — | — |
| 2004 | 68° | 48° | 58° | — | — |
| 2003 | 61° | 43° | 52° | — | — |
| 2002 | 64° | 45° | 54° | — | — |
| 2001 | 63° | 39° | 51° | — | — |
| 2000 | 59° | 43° | 51° | — | — |
| 1999 | 60° | 49° | 54° | — | — |
| 1998 | 78° | 47° | 62° | — | — |
| 1997 | 65° | 50° | 57° | — | — |
| 1996 | 72° | 55° | 63° | — | — |
| 1995 | 59° | 49° | 54° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA