Weather on August 12
Simi Valley, CA
55 Years of Data
Avg High
89°F
Avg Low
62°F
Warmest
2020
86°F avg
Coldest
2010
64°F avg
About This Date
August 12th in Simi Valley, CA typically brings warm summer weather, with average highs around 89°F and lows near 62°F — a 27°F daily swing. Over 30 years of records, the warmest August 12th was in 2020 (86°F average), while the coldest was 2010 (64°F) — a 22°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for August 12th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 63° | 79° | — | — |
| 2024 | 93° | 69° | 81° | — | — |
| 2023 | 88° | 62° | 75° | — | — |
| 2022 | 97° | 69° | 83° | — | — |
| 2021 | 96° | 71° | 84° | — | — |
| 2020warmest | 101° | 72° | 86° | — | — |
| 2019 | 95° | 59° | 77° | — | — |
| 2018 | 94° | 67° | 80° | — | — |
| 2017 | 95° | 64° | 80° | — | — |
| 2016 | 89° | 61° | 75° | — | — |
| 2015 | 92° | 64° | 78° | — | — |
| 2014 | 95° | 64° | 80° | — | — |
| 2013 | 88° | 57° | 72° | — | — |
| 2012 | 95° | 73° | 84° | — | — |
| 2011 | 77° | 57° | 67° | — | — |
| 2010coldest | 75° | 53° | 64° | — | — |
| 2009 | 80° | 53° | 67° | — | — |
| 2008 | 82° | 54° | 68° | — | — |
| 2007 | 84° | 59° | 72° | — | — |
| 2006 | 79° | 57° | 68° | — | — |
| 2005 | 77° | 57° | 67° | — | — |
| 2004 | 84° | 59° | 72° | — | — |
| 2003 | 91° | 68° | 80° | — | — |
| 2002 | 82° | 61° | 71° | — | — |
| 2001 | 79° | 59° | 69° | — | — |
| 2000 | 100° | 67° | 83° | — | — |
| 1999 | 88° | 60° | 74° | — | — |
| 1998 | 99° | 71° | 85° | — | — |
| 1997 | 87° | 56° | 71° | — | — |
| 1996 | 103° | 68° | 85° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA