Weather on June 30
Simi Valley, CA
55 Years of Data
Avg High
88°F
Avg Low
61°F
Warmest
2013
90°F avg
Coldest
2004
65°F avg
About This Date
June 30th in Simi Valley, CA typically brings warm summer weather, with average highs around 88°F and lows near 61°F — a 27°F daily swing. Over 30 years of records, the warmest June 30th was in 2013 (90°F average), while the coldest was 2004 (65°F) — a 25°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for June 30th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 63° | 79° | — | — |
| 2024 | 98° | 66° | 82° | — | — |
| 2023 | 96° | 59° | 78° | — | — |
| 2022 | 94° | 64° | 79° | — | — |
| 2021 | 93° | 59° | 76° | — | — |
| 2020 | 82° | 55° | 69° | — | — |
| 2019 | 93° | 65° | 79° | — | — |
| 2018 | 84° | 57° | 71° | — | — |
| 2017 | 83° | 55° | 69° | — | — |
| 2016 | 90° | 62° | 76° | — | — |
| 2015 | 99° | 70° | 84° | — | — |
| 2014 | 92° | 61° | 76° | — | — |
| 2013warmest | 106° | 74° | 90° | — | — |
| 2012 | 79° | 55° | 67° | — | — |
| 2011 | 79° | 55° | 67° | — | — |
| 2010 | 76° | 58° | 67° | — | — |
| 2009 | 77° | 58° | 67° | — | — |
| 2008 | 84° | 59° | 72° | — | — |
| 2007 | 82° | 61° | 71° | — | — |
| 2006 | 90° | 66° | 78° | — | — |
| 2005 | 77° | 54° | 65° | — | — |
| 2004coldest | 73° | 57° | 65° | — | — |
| 2003 | 82° | 54° | 68° | — | — |
| 2002 | 91° | 58° | 74° | — | — |
| 2001 | 97° | 62° | 79° | — | — |
| 2000 | 89° | 59° | 74° | — | — |
| 1999 | 93° | 58° | 75° | — | — |
| 1998 | 89° | 62° | 76° | — | — |
| 1997 | 80° | 56° | 68° | — | — |
| 1996 | 104° | 74° | 89° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA