Weather on September 7
Simi Valley, CA
55 Years of Data
Avg High
90°F
Avg Low
64°F
Warmest
2022
90°F avg
Coldest
2010
63°F avg
About This Date
September 7th in Simi Valley, CA typically brings hot fall weather, with average highs around 90°F and lows near 64°F — a 26°F daily swing. Over 30 years of records, the warmest September 7th was in 2022 (90°F average), while the coldest was 2010 (63°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.7°F warmer on this date compared to 20-30 years ago.
Planning for September 7th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
3.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 67° | 82° | — | — |
| 2024 | 104° | 76° | 90° | — | — |
| 2023 | 86° | 61° | 73° | — | — |
| 2022warmest | 103° | 78° | 90° | — | — |
| 2021 | 95° | 64° | 80° | — | — |
| 2020 | 97° | 69° | 83° | — | — |
| 2019 | 94° | 62° | 78° | — | — |
| 2018 | 99° | 60° | 79° | — | — |
| 2017 | 93° | 67° | 80° | — | — |
| 2016 | 86° | 58° | 72° | — | — |
| 2015 | 96° | 72° | 84° | — | — |
| 2014 | 100° | 75° | 88° | — | — |
| 2013 | 99° | 76° | 87° | — | — |
| 2012 | 82° | 66° | 74° | — | — |
| 2011 | 97° | 73° | 85° | — | — |
| 2010coldest | 71° | 56° | 63° | — | — |
| 2009 | 81° | 64° | 72° | — | — |
| 2008 | 82° | 57° | 70° | — | — |
| 2007 | 77° | 55° | 66° | — | — |
| 2006 | 81° | 59° | 70° | — | — |
| 2005 | 77° | 54° | 65° | — | — |
| 2004 | 90° | 63° | 76° | — | — |
| 2003 | 86° | 63° | 74° | — | — |
| 2002 | 84° | 58° | 71° | — | — |
| 2001 | 81° | 56° | 68° | — | — |
| 2000 | 94° | 69° | 81° | — | — |
| 1999 | 91° | 55° | 73° | — | — |
| 1998 | 94° | 63° | 78° | — | — |
| 1997 | 99° | 65° | 82° | — | — |
| 1996 | 95° | 68° | 82° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA