Weather on October 31
Simi Valley, CA
55 Years of Data
Avg High
75°F
Avg Low
56°F
Warmest
2015
82°F avg
Coldest
1996
51°F avg
About This Date
October 31st in Simi Valley, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 56°F. Over 31 years of records, the warmest October 31st was in 2015 (82°F average), while the coldest was 1996 (51°F) — a 31°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 62° | 72° | — | — |
| 2024 | 71° | 53° | 62° | — | — |
| 2023 | 81° | 66° | 73° | — | — |
| 2022 | 85° | 62° | 73° | — | — |
| 2021 | 68° | 52° | 60° | — | — |
| 2020 | 89° | 65° | 77° | — | — |
| 2019 | 73° | 53° | 63° | — | — |
| 2018 | 79° | 63° | 71° | — | — |
| 2017 | 64° | 54° | 59° | — | — |
| 2016 | 67° | 51° | 59° | — | — |
| 2015warmest | 92° | 72° | 82° | — | — |
| 2014 | 64° | 52° | 58° | — | — |
| 2013 | 81° | 55° | 68° | — | — |
| 2012 | 72° | 48° | 60° | — | — |
| 2011 | 79° | 54° | 66° | — | — |
| 2010 | 69° | 50° | 60° | — | — |
| 2009 | 84° | 59° | 72° | — | — |
| 2008 | 81° | 63° | 72° | — | — |
| 2007 | 73° | 50° | 62° | — | — |
| 2006 | 63° | 48° | 55° | — | — |
| 2005 | 86° | 72° | 79° | — | — |
| 2004 | 73° | 48° | 61° | — | — |
| 2003 | 59° | 50° | 55° | — | — |
| 2002 | 61° | 50° | 55° | — | — |
| 2001 | 72° | 55° | 63° | — | — |
| 2000 | 66° | 49° | 57° | — | — |
| 1999 | 90° | 69° | 79° | — | — |
| 1998 | 79° | 57° | 68° | — | — |
| 1997 | 92° | 69° | 80° | — | — |
| 1996coldest | 60° | 43° | 51° | — | — |
| 1995 | 57° | 53° | 55° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA