Weather on November 21
Simi Valley, CA
55 Years of Data
Avg High
71°F
Avg Low
54°F
Warmest
2017
79°F avg
Coldest
2010
49°F avg
About This Date
November 21st in Simi Valley, CA typically brings pleasant fall weather, with average highs around 71°F and lows near 54°F. Over 31 years of records, the warmest November 21st was in 2017 (79°F average), while the coldest was 2010 (49°F) — a 30°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for November 21st in Simi Valley, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 47° | 52° | — | — |
| 2024 | 78° | 58° | 68° | — | — |
| 2023 | 74° | 59° | 66° | — | — |
| 2022 | 72° | 56° | 64° | — | — |
| 2021 | 75° | 65° | 70° | — | — |
| 2020 | 80° | 62° | 71° | — | — |
| 2019 | 62° | 46° | 54° | — | — |
| 2018 | 67° | 50° | 58° | — | — |
| 2017warmest | 89° | 70° | 79° | — | — |
| 2016 | 64° | 50° | 57° | — | — |
| 2015 | 80° | 66° | 73° | — | — |
| 2014 | 70° | 51° | 60° | — | — |
| 2013 | 63° | 50° | 56° | — | — |
| 2012 | 70° | 48° | 59° | — | — |
| 2011 | 59° | 41° | 50° | — | — |
| 2010coldest | 57° | 41° | 49° | — | — |
| 2009 | 68° | 46° | 57° | — | — |
| 2008 | 84° | 61° | 72° | — | — |
| 2007 | 72° | 46° | 59° | — | — |
| 2006 | 75° | 54° | 64° | — | — |
| 2005 | 81° | 68° | 74° | — | — |
| 2004 | 55° | 46° | 51° | — | — |
| 2003 | 59° | 52° | 55° | — | — |
| 2002 | 86° | 63° | 74° | — | — |
| 2001 | 72° | 54° | 63° | — | — |
| 2000 | 77° | 51° | 64° | — | — |
| 1999 | 64° | 48° | 56° | — | — |
| 1998 | 79° | 60° | 69° | — | — |
| 1997 | 79° | 59° | 69° | — | — |
| 1996 | 59° | 57° | 58° | — | — |
| 1995 | 75° | 52° | 63° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA