Weather on March 17
Simi Valley, CA
55 Years of Data
Avg High
70°F
Avg Low
50°F
Warmest
2026
85°F avg
Coldest
2002
44°F avg
About This Date
March 17th in Simi Valley, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 50°F. Over 31 years of records, the warmest March 17th was in 2026 (85°F average), while the coldest was 2002 (44°F) — a 41°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for March 17th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
2.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 95° | 75° | 85° | — | — |
| 2025 | 62° | 44° | 53° | — | — |
| 2024 | 72° | 46° | 59° | — | — |
| 2023 | 67° | 44° | 55° | — | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 66° | 41° | 54° | — | — |
| 2020 | 53° | 40° | 46° | — | — |
| 2019 | 79° | 61° | 70° | — | — |
| 2018 | 54° | 41° | 47° | — | — |
| 2017 | 81° | 60° | 70° | — | — |
| 2016 | 81° | 60° | 70° | — | — |
| 2015 | 78° | 61° | 69° | — | — |
| 2014 | 75° | 57° | 66° | — | — |
| 2013 | 80° | 48° | 64° | — | — |
| 2012 | 54° | 41° | 47° | — | — |
| 2011 | 72° | 48° | 60° | — | — |
| 2010 | 82° | 61° | 71° | — | — |
| 2009 | 81° | 50° | 65° | — | — |
| 2008 | 64° | 48° | 56° | — | — |
| 2007 | 70° | 45° | 57° | — | — |
| 2006 | 54° | 43° | 48° | — | — |
| 2005 | 66° | 48° | 57° | — | — |
| 2004 | 88° | 57° | 72° | — | — |
| 2003 | 63° | 45° | 54° | — | — |
| 2002coldest | 52° | 36° | 44° | — | — |
| 2001 | 74° | 48° | 61° | — | — |
| 2000 | 77° | 49° | 63° | — | — |
| 1999 | 52° | 42° | 47° | — | — |
| 1998 | 60° | 50° | 55° | — | — |
| 1997 | 69° | 47° | 58° | — | — |
| 1996 | 69° | 50° | 60° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA