Weather on November 18
Simi Valley, CA
55 Years of Data
Avg High
73°F
Avg Low
54°F
Warmest
2019
79°F avg
Coldest
2025
49°F avg
About This Date
November 18th in Simi Valley, CA typically brings pleasant fall weather, with average highs around 73°F and lows near 54°F. Over 31 years of records, the warmest November 18th was in 2019 (79°F average), while the coldest was 2025 (49°F) — a 30°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for November 18th in Simi Valley, CA? Great weather for outdoor activities.
Cooling Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025coldest | 54° | 44° | 49° | — | — |
| 2024 | 63° | 48° | 55° | — | — |
| 2023 | 66° | 55° | 61° | — | — |
| 2022 | 70° | 57° | 63° | — | — |
| 2021 | 74° | 53° | 63° | — | — |
| 2020 | 71° | 52° | 61° | — | — |
| 2019warmest | 90° | 69° | 79° | — | — |
| 2018 | 72° | 55° | 63° | — | — |
| 2017 | 75° | 54° | 64° | — | — |
| 2016 | 71° | 54° | 62° | — | — |
| 2015 | 80° | 62° | 71° | — | — |
| 2014 | 77° | 59° | 68° | — | — |
| 2013 | 69° | 48° | 59° | — | — |
| 2012 | 61° | 50° | 55° | — | — |
| 2011 | 57° | 48° | 53° | — | — |
| 2010 | 73° | 50° | 62° | — | — |
| 2009 | 72° | 53° | 62° | — | — |
| 2008 | 88° | 61° | 74° | — | — |
| 2007 | 70° | 46° | 58° | — | — |
| 2006 | 86° | 57° | 72° | — | — |
| 2005 | 79° | 70° | 74° | — | — |
| 2004 | 75° | 52° | 63° | — | — |
| 2003 | 79° | 48° | 63° | — | — |
| 2002 | 77° | 66° | 72° | — | — |
| 2001 | 79° | 57° | 68° | — | — |
| 2000 | 68° | 52° | 60° | — | — |
| 1999 | 67° | 49° | 58° | — | — |
| 1998 | 71° | 51° | 61° | — | — |
| 1997 | 72° | 52° | 62° | — | — |
| 1996 | 72° | 50° | 61° | — | — |
| 1995 | 85° | 64° | 74° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA