Weather on August 25
Simi Valley, CA
55 Years of Data
Avg High
90°F
Avg Low
63°F
Warmest
1999
92°F avg
Coldest
2012
66°F avg
About This Date
August 25th in Simi Valley, CA typically brings hot summer weather, with average highs around 90°F and lows near 63°F — a 27°F daily swing. Over 30 years of records, the warmest August 25th was in 1999 (92°F average), while the coldest was 2012 (66°F) — a 26°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 25th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 99° | 69° | 84° | — | — |
| 2024 | 86° | 59° | 73° | — | — |
| 2023 | 90° | 63° | 76° | — | — |
| 2022 | 97° | 67° | 82° | — | — |
| 2021 | 96° | 65° | 80° | — | — |
| 2020 | 96° | 69° | 83° | — | — |
| 2019 | 99° | 68° | 83° | — | — |
| 2018 | 88° | 60° | 74° | — | — |
| 2017 | 91° | 59° | 75° | — | — |
| 2016 | 86° | 57° | 72° | — | — |
| 2015 | 84° | 67° | 75° | — | — |
| 2014 | 83° | 60° | 71° | — | — |
| 2013 | 97° | 68° | 82° | — | — |
| 2012coldest | 75° | 57° | 66° | — | — |
| 2011 | 90° | 63° | 76° | — | — |
| 2010 | 93° | 66° | 80° | — | — |
| 2009 | 91° | 61° | 76° | — | — |
| 2008 | 86° | 64° | 75° | — | — |
| 2007 | 79° | 59° | 69° | — | — |
| 2006 | 79° | 57° | 68° | — | — |
| 2005 | 93° | 55° | 74° | — | — |
| 2004 | 77° | 59° | 68° | — | — |
| 2003 | 84° | 61° | 72° | — | — |
| 2002 | 82° | 57° | 70° | — | — |
| 2001 | 94° | 68° | 81° | — | — |
| 2000 | 93° | 64° | 79° | — | — |
| 1999warmest | 104° | 80° | 92° | — | — |
| 1998 | 95° | 63° | 79° | — | — |
| 1997 | 92° | 65° | 78° | — | — |
| 1996 | 98° | 73° | 86° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA