Weather on December 29
Simi Valley, CA
55 Years of Data
Avg High
63°F
Avg Low
50°F
Warmest
2017
76°F avg
Coldest
2012
42°F avg
About This Date
December 29th in Simi Valley, CA typically brings mild winter weather, with average highs around 63°F and lows near 50°F. Over 31 years of records, the warmest December 29th was in 2017 (76°F average), while the coldest was 2012 (42°F) — a 34°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 29th in Simi Valley, CA? Great weather for outdoor activities.
Cooling Trend
2.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 56° | 59° | — | — |
| 2024 | 66° | 48° | 57° | — | — |
| 2023 | 63° | 49° | 56° | — | — |
| 2022 | 51° | 47° | 49° | — | — |
| 2021 | 48° | 41° | 45° | — | — |
| 2020 | 56° | 42° | 49° | — | — |
| 2019 | 58° | 45° | 51° | — | — |
| 2018 | 56° | 44° | 50° | — | — |
| 2017warmest | 84° | 68° | 76° | — | — |
| 2016 | 73° | 58° | 65° | — | — |
| 2015 | 57° | 40° | 48° | — | — |
| 2014 | 61° | 46° | 53° | — | — |
| 2013 | 68° | 59° | 64° | — | — |
| 2012coldest | 45° | 39° | 42° | — | — |
| 2011 | 75° | 55° | 65° | — | — |
| 2010 | 56° | 44° | 50° | — | — |
| 2009 | 65° | 47° | 56° | — | — |
| 2008 | 75° | 54° | 64° | — | — |
| 2007 | 57° | 43° | 50° | — | — |
| 2006 | 70° | 50° | 60° | — | — |
| 2005 | 63° | 46° | 54° | — | — |
| 2004 | 54° | 46° | 50° | — | — |
| 2003 | 54° | 37° | 45° | — | — |
| 2002 | 55° | 41° | 48° | — | — |
| 2001 | 55° | 48° | 52° | — | — |
| 2000 | 82° | 61° | 71° | — | — |
| 1999 | 74° | 56° | 65° | — | — |
| 1998 | 81° | 62° | 71° | — | — |
| 1997 | 69° | 62° | 66° | — | — |
| 1996 | 65° | 48° | 56° | — | — |
| 1995 | 68° | 53° | 61° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA