Weather on November 21
Simi Valley, CA
55 Years of Data
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° | — | — |
Simi Valley, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Simi Valley, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Simi Valley, CA
Most pleasant months in Simi Valley, CA: January, March, April, May, June, October, November.
What to expect on November 21st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
November 21st outlook →