Weather on June 15
Simi Valley, CA
55 Years of Data
Avg High
83°F
Avg Low
58°F
Warmest
2021
89°F avg
Coldest
2023
59°F avg
About This Date
June 15th in Simi Valley, CA typically brings warm summer weather, with average highs around 83°F and lows near 58°F — a 25°F daily swing. Over 30 years of records, the warmest June 15th was in 2021 (89°F average), while the coldest was 2023 (59°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 warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for June 15th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 64° | 80° | — | — |
| 2024 | 95° | 64° | 80° | — | — |
| 2023coldest | 65° | 54° | 59° | — | — |
| 2022 | 92° | 61° | 76° | — | — |
| 2021warmest | 102° | 76° | 89° | — | — |
| 2020 | 85° | 58° | 71° | — | — |
| 2019 | 79° | 54° | 66° | — | — |
| 2018 | 87° | 55° | 71° | — | — |
| 2017 | 92° | 67° | 79° | — | — |
| 2016 | 72° | 54° | 63° | — | — |
| 2015 | 91° | 56° | 73° | — | — |
| 2014 | 82° | 53° | 68° | — | — |
| 2013 | 81° | 54° | 67° | — | — |
| 2012 | 73° | 57° | 65° | — | — |
| 2011 | 75° | 52° | 63° | — | — |
| 2010 | 76° | 55° | 65° | — | — |
| 2009 | 74° | 55° | 64° | — | — |
| 2008 | 81° | 57° | 69° | — | — |
| 2007 | 79° | 54° | 66° | — | — |
| 2006 | 81° | 59° | 70° | — | — |
| 2005 | 73° | 59° | 66° | — | — |
| 2004 | 75° | 55° | 65° | — | — |
| 2003 | 79° | 55° | 67° | — | — |
| 2002 | 84° | 55° | 70° | — | — |
| 2001 | 96° | 69° | 83° | — | — |
| 2000 | 91° | 59° | 75° | — | — |
| 1999 | 90° | 60° | 75° | — | — |
| 1998 | 86° | 59° | 73° | — | — |
| 1997 | 79° | 55° | 67° | — | — |
| 1996 | 86° | 55° | 71° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA