Weather on August 13
Simi Valley, CA
55 Years of Data
Avg High
90°F
Avg Low
63°F
Warmest
1996
88°F avg
Coldest
2010
64°F avg
About This Date
August 13th 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 13th was in 1996 (88°F average), while the coldest was 2010 (64°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for August 13th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 60° | 76° | — | — |
| 2024 | 93° | 67° | 80° | — | — |
| 2023 | 92° | 63° | 77° | — | — |
| 2022 | 99° | 70° | 84° | — | — |
| 2021 | 92° | 67° | 79° | — | — |
| 2020 | 100° | 69° | 85° | — | — |
| 2019 | 98° | 63° | 80° | — | — |
| 2018 | 92° | 65° | 78° | — | — |
| 2017 | 95° | 59° | 77° | — | — |
| 2016 | 94° | 66° | 80° | — | — |
| 2015 | 97° | 74° | 85° | — | — |
| 2014 | 87° | 58° | 72° | — | — |
| 2013 | 90° | 56° | 73° | — | — |
| 2012 | 91° | 70° | 80° | — | — |
| 2011 | 79° | 55° | 67° | — | — |
| 2010coldest | 77° | 52° | 64° | — | — |
| 2009 | 78° | 54° | 66° | — | — |
| 2008 | 82° | 54° | 68° | — | — |
| 2007 | 90° | 64° | 77° | — | — |
| 2006 | 79° | 55° | 67° | — | — |
| 2005 | 75° | 61° | 68° | — | — |
| 2004 | 81° | 61° | 71° | — | — |
| 2003 | 93° | 66° | 80° | — | — |
| 2002 | 79° | 61° | 70° | — | — |
| 2001 | 81° | 59° | 70° | — | — |
| 2000 | 97° | 68° | 82° | — | — |
| 1999 | 90° | 66° | 78° | — | — |
| 1998 | 99° | 71° | 85° | — | — |
| 1997 | 95° | 60° | 78° | — | — |
| 1996warmest | 106° | 70° | 88° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA