Weather on December 5
Simi Valley, CA
55 Years of Data
Avg High
67°F
Avg Low
51°F
Warmest
2023
72°F avg
Coldest
1998
47°F avg
About This Date
December 5th in Simi Valley, CA typically brings mild winter weather, with average highs around 67°F and lows near 51°F. Over 31 years of records, the warmest December 5th was in 2023 (72°F average), while the coldest was 1998 (47°F) — a 25°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
Planning for December 5th 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 | 72° | 54° | 63° | — | — |
| 2024 | 79° | 64° | 71° | — | — |
| 2023warmest | 80° | 65° | 72° | — | — |
| 2022 | 60° | 48° | 54° | — | — |
| 2021 | 80° | 55° | 68° | — | — |
| 2020 | 73° | 57° | 65° | — | — |
| 2019 | 63° | 50° | 56° | — | — |
| 2018 | 53° | 46° | 50° | — | — |
| 2017 | 59° | 50° | 55° | — | — |
| 2016 | 64° | 48° | 56° | — | — |
| 2015 | 71° | 52° | 61° | — | — |
| 2014 | 63° | 54° | 58° | — | — |
| 2013 | 57° | 40° | 48° | — | — |
| 2012 | 79° | 39° | 59° | — | — |
| 2011 | 59° | 48° | 54° | — | — |
| 2010 | 67° | 47° | 57° | — | — |
| 2009 | 56° | 45° | 50° | — | — |
| 2008 | 72° | 63° | 67° | — | — |
| 2007 | 77° | 57° | 67° | — | — |
| 2006 | 77° | 55° | 66° | — | — |
| 2005 | 63° | 52° | 57° | — | — |
| 2004 | 50° | 45° | 47° | — | — |
| 2003 | 72° | 52° | 62° | — | — |
| 2002 | 72° | 57° | 64° | — | — |
| 2001 | 59° | 39° | 49° | — | — |
| 2000 | 79° | 64° | 71° | — | — |
| 1999 | 67° | 50° | 58° | — | — |
| 1998coldest | 54° | 41° | 47° | — | — |
| 1997 | 56° | 48° | 52° | — | — |
| 1996 | 56° | 49° | 52° | — | — |
| 1995 | 77° | 59° | 68° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA