Weather on March 20
Simi Valley, CA
55 Years of Data
Avg High
69°F
Avg Low
45°F
Warmest
2026
84°F avg
Coldest
2011
6°F avg
About This Date
March 20th in Simi Valley, CA typically brings mild spring weather, with average highs around 69°F and lows near 45°F. Over 31 years of records, the warmest March 20th was in 2026 (84°F average), while the coldest was 2011 (6°F) — a 78°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 March 20th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 95° | 73° | 84° | — | — |
| 2025 | 71° | 55° | 63° | — | — |
| 2024 | 75° | 53° | 64° | — | — |
| 2023 | 58° | 46° | 52° | — | — |
| 2022 | 65° | 46° | 55° | — | — |
| 2021 | 63° | 49° | 56° | — | — |
| 2020 | 57° | 45° | 51° | — | — |
| 2019 | 60° | 47° | 53° | — | — |
| 2018 | 67° | 51° | 59° | — | — |
| 2017 | 68° | 48° | 58° | — | — |
| 2016 | 76° | 51° | 63° | — | — |
| 2015 | 85° | 53° | 69° | — | — |
| 2014 | 76° | 53° | 64° | — | — |
| 2013 | 69° | 53° | 61° | — | — |
| 2012 | 66° | 41° | 54° | — | — |
| 2011coldest | 52° | -40° | 6° | — | — |
| 2010 | 79° | 50° | 64° | — | — |
| 2009 | 66° | 45° | 55° | — | — |
| 2008 | 68° | 43° | 55° | — | — |
| 2007 | 55° | -40° | 8° | — | — |
| 2006 | 55° | 45° | 50° | — | — |
| 2005 | 59° | 48° | 54° | — | — |
| 2004 | 68° | 50° | 59° | — | — |
| 2003 | 64° | 43° | 53° | — | — |
| 2002 | 75° | 46° | 61° | — | — |
| 2001 | 82° | 61° | 71° | — | — |
| 2000 | 60° | 49° | 54° | — | — |
| 1999 | 54° | 43° | 48° | — | — |
| 1998 | 69° | 50° | 60° | — | — |
| 1997 | 92° | 65° | 78° | — | — |
| 1996 | 80° | 58° | 69° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA