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Simi Valley, CA Weather on October 9
October 9th in Simi Valley, CA typically brings warm fall weather, with average highs around 80°F and lows near 58°F. Over 31 years of records, the warmest October 9th was in 2015 (90°F average), while the coldest was 2013 (52°F) — a 38°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
What to Expect on October 9
Planning for October 9th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
October 9 Weather Records for Simi Valley
- •The all-time record high for October 9th in Simi Valley, CA is 99°F, set in 2015.
- •The coldest October 9th on record dropped to 48°F in 2013.
- •Temperatures have reached 90°F or higher on October 9th in 7 of the last 31 years.
Frequently Asked Questions
What was the warmest October 9 ever in Simi Valley?
The warmest October 9 in Simi Valley, CA reached 99°F in 2015. That is 19°F above the long-term average high of 80°F.
What was the coldest October 9 ever in Simi Valley?
The coldest October 9 in Simi Valley, CA dropped to 48°F in 2013. That is 10°F below the long-term average low of 58°F.
What is the average temperature on October 9 in Simi Valley?
On October 9, Simi Valley averages a high of 80°F and a low of 58°F based on 31 years of NOAA weather observations from SIMI VALLEY CALIFORNIA.
How many years of weather data are available for October 9 in Simi Valley?
We have 31 years of weather records for October 9 in Simi Valley, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
October 9 Weather History in Simi Valley
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 55°F | -- | -- |
| 2024 | 92°F | 63°F | -- | -- |
| 2023 | 89°F | 63°F | -- | -- |
| 2022 | 90°F | 62°F | -- | -- |
| 2021 | 72°F | 55°F | -- | -- |
| 2020 | 78°F | 57°F | -- | -- |
| 2019 | 80°F | 54°F | -- | -- |
| 2018 | 76°F | 55°F | -- | -- |
| 2017 | 78°F | 57°F | -- | -- |
| 2016 | 91°F | 66°F | -- | -- |
| 2015 | 99°F | 82°F | -- | -- |
| 2014 | 84°F | 60°F | -- | -- |
| 2013 | 55°F | 48°F | -- | -- |
| 2012 | 73°F | 54°F | -- | -- |
| 2011 | 81°F | 55°F | -- | -- |
| 2010 | 90°F | 61°F | -- | -- |
| 2009 | 77°F | 51°F | -- | -- |
| 2008 | 81°F | 57°F | -- | -- |
| 2007 | 75°F | 52°F | -- | -- |
| 2006 | 68°F | 50°F | -- | -- |
| 2005 | 73°F | 50°F | -- | -- |
| 2004 | 70°F | 55°F | -- | -- |
| 2003 | 75°F | 59°F | -- | -- |
| 2002 | 73°F | 50°F | -- | -- |
| 2001 | 70°F | 55°F | -- | -- |
| 2000 | 77°F | 54°F | -- | -- |
| 1999 | 95°F | 75°F | -- | -- |
| 1998 | 81°F | 60°F | -- | -- |
| 1997 | 81°F | 58°F | -- | -- |
| 1996 | 95°F | 71°F | -- | -- |
| 1995 | 83°F | 55°F | -- | -- |
Based on 31 years of data from NOAA station: SIMI VALLEY CALIFORNIA
Monthly Climate Averages
Historical temperature and precipitation averages for Simi Valley, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.