Weather on October 15
Simi Valley, CA
55 Years of Data
Avg High
79°F
Avg Low
59°F
Warmest
2020
87°F avg
Coldest
2007
55°F avg
About This Date
October 15th in Simi Valley, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 59°F. Over 31 years of records, the warmest October 15th was in 2020 (87°F average), while the coldest was 2007 (55°F) — a 32°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for October 15th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 49° | 58° | — | — |
| 2024 | 75° | 54° | 64° | — | — |
| 2023 | 93° | 71° | 82° | — | — |
| 2022 | 65° | 58° | 61° | — | — |
| 2021 | 82° | 66° | 74° | — | — |
| 2020warmest | 101° | 73° | 87° | — | — |
| 2019 | 90° | 59° | 74° | — | — |
| 2018 | 73° | 63° | 68° | — | — |
| 2017 | 89° | 71° | 80° | — | — |
| 2016 | 75° | 54° | 64° | — | — |
| 2015 | 86° | 63° | 74° | — | — |
| 2014 | 71° | 56° | 63° | — | — |
| 2013 | 84° | 64° | 74° | — | — |
| 2012 | 91° | 66° | 79° | — | — |
| 2011 | 75° | 54° | 64° | — | — |
| 2010 | 72° | 58° | 65° | — | — |
| 2009 | 87° | 57° | 72° | — | — |
| 2008 | 90° | 66° | 78° | — | — |
| 2007coldest | 57° | 54° | 55° | — | — |
| 2006 | 64° | 57° | 61° | — | — |
| 2005 | 70° | 54° | 62° | — | — |
| 2004 | 72° | 50° | 61° | — | — |
| 2003 | 73° | 52° | 62° | — | — |
| 2002 | 64° | 50° | 57° | — | — |
| 2001 | 86° | 55° | 71° | — | — |
| 2000 | 79° | 60° | 69° | — | — |
| 1999 | 75° | 56° | 65° | — | — |
| 1998 | 74° | 53° | 63° | — | — |
| 1997 | 95° | 75° | 85° | — | — |
| 1996 | 89° | 56° | 72° | — | — |
| 1995 | 72° | 55° | 63° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA