Weather on June 20
Simi Valley, CA
55 Years of Data
Avg High
85°F
Avg Low
59°F
Warmest
2016
97°F avg
Coldest
2003
61°F avg
About This Date
June 20th in Simi Valley, CA typically brings warm summer weather, with average highs around 85°F and lows near 59°F — a 26°F daily swing. Over 30 years of records, the warmest June 20th was in 2016 (97°F average), while the coldest was 2003 (61°F) — a 36°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 6.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.4°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 56° | 68° | — | — |
| 2024 | 83° | 57° | 70° | — | — |
| 2023 | 79° | 54° | 66° | — | — |
| 2022 | 97° | 66° | 81° | — | — |
| 2021 | 96° | 59° | 78° | — | — |
| 2020 | 79° | 54° | 66° | — | — |
| 2019 | 76° | 56° | 66° | — | — |
| 2018 | 91° | 58° | 74° | — | — |
| 2017 | 101° | 69° | 85° | — | — |
| 2016warmest | 107° | 86° | 97° | — | — |
| 2015 | 95° | 68° | 82° | — | — |
| 2014 | 94° | 60° | 77° | — | — |
| 2013 | 88° | 63° | 75° | — | — |
| 2012 | 75° | 54° | 64° | — | — |
| 2011 | 81° | 54° | 67° | — | — |
| 2010 | 73° | 54° | 63° | — | — |
| 2009 | 71° | 56° | 63° | — | — |
| 2008 | 104° | 72° | 88° | — | — |
| 2007 | 81° | 52° | 66° | — | — |
| 2006 | 75° | 54° | 64° | — | — |
| 2005 | 79° | 54° | 66° | — | — |
| 2004 | 72° | 57° | 64° | — | — |
| 2003coldest | 66° | 55° | 61° | — | — |
| 2002 | 72° | 57° | 64° | — | — |
| 2001 | 92° | 65° | 78° | — | — |
| 2000 | 89° | 57° | 73° | — | — |
| 1999 | 88° | 55° | 71° | — | — |
| 1998 | 78° | 54° | 66° | — | — |
| 1997 | 85° | 58° | 71° | — | — |
| 1996 | 88° | 58° | 73° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA