Weather on March 15
Simi Valley, CA
55 Years of Data
Avg High
69°F
Avg Low
50°F
Warmest
2015
79°F avg
Coldest
1999
43°F avg
About This Date
March 15th in Simi Valley, CA typically brings mild spring weather, with average highs around 69°F and lows near 50°F. Over 31 years of records, the warmest March 15th was in 2015 (79°F average), while the coldest was 1999 (43°F) — a 36°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for March 15th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
2.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 83° | 61° | 72° | — | — |
| 2025 | 62° | 43° | 52° | — | — |
| 2024 | 66° | 50° | 58° | — | — |
| 2023 | 61° | 48° | 54° | — | — |
| 2022 | 79° | 58° | 68° | — | — |
| 2021 | 52° | 39° | 45° | — | — |
| 2020 | 54° | 46° | 50° | — | — |
| 2019 | 64° | 53° | 59° | — | — |
| 2018 | 61° | 44° | 52° | — | — |
| 2017 | 82° | 62° | 72° | — | — |
| 2016 | 78° | 56° | 67° | — | — |
| 2015warmest | 88° | 70° | 79° | — | — |
| 2014 | 84° | 62° | 73° | — | — |
| 2013 | 87° | 62° | 75° | — | — |
| 2012 | 63° | 46° | 54° | — | — |
| 2011 | 79° | 52° | 65° | — | — |
| 2010 | 77° | 61° | 69° | — | — |
| 2009 | 61° | 46° | 53° | — | — |
| 2008 | 57° | 41° | 49° | — | — |
| 2007 | 70° | 46° | 58° | — | — |
| 2006 | 61° | 39° | 50° | — | — |
| 2005 | 70° | 48° | 59° | — | — |
| 2004 | 70° | 18° | 44° | — | — |
| 2003 | 57° | 54° | 55° | — | — |
| 2002 | 59° | 43° | 51° | — | — |
| 2001 | 63° | 44° | 53° | — | — |
| 2000 | 79° | 52° | 65° | — | — |
| 1999coldest | 46° | 40° | 43° | — | — |
| 1998 | 74° | 52° | 63° | — | — |
| 1997 | 75° | 47° | 61° | — | — |
| 1996 | 68° | 54° | 61° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA