Weather on October 17
Simi Valley, CA
55 Years of Data
Avg High
80°F
Avg Low
60°F
Warmest
2012
86°F avg
Coldest
2002
59°F avg
About This Date
October 17th in Simi Valley, CA typically brings warm fall weather, with average highs around 80°F and lows near 60°F. Over 31 years of records, the warmest October 17th was in 2012 (86°F average), while the coldest was 2002 (59°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for October 17th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 62° | 71° | — | — |
| 2024 | 67° | 56° | 61° | — | — |
| 2023 | 91° | 68° | 80° | — | — |
| 2022 | 85° | 58° | 71° | — | — |
| 2021 | 80° | 51° | 66° | — | — |
| 2020 | 96° | 69° | 83° | — | — |
| 2019 | 78° | 59° | 69° | — | — |
| 2018 | 82° | 64° | 73° | — | — |
| 2017 | 95° | 76° | 85° | — | — |
| 2016 | 69° | 57° | 63° | — | — |
| 2015 | 81° | 62° | 71° | — | — |
| 2014 | 72° | 57° | 64° | — | — |
| 2013 | 81° | 63° | 72° | — | — |
| 2012warmest | 99° | 73° | 86° | — | — |
| 2011 | 79° | 55° | 67° | — | — |
| 2010 | 62° | 57° | 60° | — | — |
| 2009 | 97° | 73° | 85° | — | — |
| 2008 | 90° | 57° | 73° | — | — |
| 2007 | 68° | 52° | 60° | — | — |
| 2006 | 68° | 54° | 61° | — | — |
| 2005 | 68° | 54° | 61° | — | — |
| 2004 | 63° | 59° | 61° | — | — |
| 2003 | 90° | 55° | 72° | — | — |
| 2002coldest | 68° | 50° | 59° | — | — |
| 2001 | 77° | 50° | 64° | — | — |
| 2000 | 86° | 60° | 73° | — | — |
| 1999 | 78° | 70° | 74° | — | — |
| 1998 | 74° | 61° | 67° | — | — |
| 1997 | 95° | 68° | 82° | — | — |
| 1996 | 84° | 51° | 68° | — | — |
| 1995 | 82° | 57° | 70° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA