Weather on December 27
Simi Valley, CA
55 Years of Data
Avg High
62°F
Avg Low
48°F
Warmest
2013
72°F avg
Coldest
2021
44°F avg
About This Date
December 27th in Simi Valley, CA typically brings mild winter weather, with average highs around 62°F and lows near 48°F. Over 31 years of records, the warmest December 27th was in 2013 (72°F average), while the coldest was 2021 (44°F) — a 28°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for December 27th in Simi Valley, CA? Great weather for outdoor activities.
Cooling Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 45° | 52° | — | — |
| 2024 | 55° | 46° | 51° | — | — |
| 2023 | 63° | 51° | 57° | — | — |
| 2022 | 65° | 48° | 56° | — | — |
| 2021coldest | 49° | 40° | 44° | — | — |
| 2020 | 65° | 47° | 56° | — | — |
| 2019 | 56° | 44° | 50° | — | — |
| 2018 | 59° | 46° | 53° | — | — |
| 2017 | 79° | 62° | 70° | — | — |
| 2016 | 62° | 46° | 54° | — | — |
| 2015 | 57° | 42° | 50° | — | — |
| 2014 | 57° | 44° | 51° | — | — |
| 2013warmest | 83° | 61° | 72° | — | — |
| 2012 | 59° | 42° | 51° | — | — |
| 2011 | 73° | 46° | 60° | — | — |
| 2010 | 66° | 53° | 60° | — | — |
| 2009 | 59° | 43° | 51° | — | — |
| 2008 | 55° | 43° | 49° | — | — |
| 2007 | 52° | 39° | 45° | — | — |
| 2006 | 57° | 46° | 52° | — | — |
| 2005 | 63° | 45° | 54° | — | — |
| 2004 | 55° | 50° | 53° | — | — |
| 2003 | 55° | 37° | 46° | — | — |
| 2002 | 68° | 43° | 55° | — | — |
| 2001 | 66° | 48° | 57° | — | — |
| 2000 | 72° | 54° | 63° | — | — |
| 1999 | 67° | 58° | 62° | — | — |
| 1998 | 74° | 60° | 67° | — | — |
| 1997 | 66° | 45° | 55° | — | — |
| 1996 | 51° | 47° | 49° | — | — |
| 1995 | 67° | 53° | 60° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA