Weather on August 19
Simi Valley, CA
55 Years of Data
Avg High
87°F
Avg Low
62°F
Warmest
2020
89°F avg
Coldest
2002
65°F avg
About This Date
August 19th in Simi Valley, CA typically brings warm summer weather, with average highs around 87°F and lows near 62°F — a 25°F daily swing. Over 30 years of records, the warmest August 19th was in 2020 (89°F average), while the coldest was 2002 (65°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for August 19th in Simi Valley, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 66° | 80° | — | — |
| 2024 | 94° | 70° | 82° | — | — |
| 2023 | 87° | 66° | 77° | — | — |
| 2022 | 97° | 65° | 81° | — | — |
| 2021 | 80° | 61° | 70° | — | — |
| 2020warmest | 104° | 74° | 89° | — | — |
| 2019 | 90° | 58° | 74° | — | — |
| 2018 | 92° | 65° | 78° | — | — |
| 2017 | 90° | 58° | 74° | — | — |
| 2016 | 94° | 61° | 77° | — | — |
| 2015 | 87° | 61° | 74° | — | — |
| 2014 | 83° | 61° | 72° | — | — |
| 2013 | 95° | 62° | 79° | — | — |
| 2012 | 88° | 70° | 79° | — | — |
| 2011 | 77° | 54° | 65° | — | — |
| 2010 | 87° | 67° | 77° | — | — |
| 2009 | 76° | 55° | 65° | — | — |
| 2008 | 77° | 55° | 66° | — | — |
| 2007 | 88° | 63° | 75° | — | — |
| 2006 | 77° | 55° | 66° | — | — |
| 2005 | 77° | 55° | 66° | — | — |
| 2004 | 77° | 59° | 68° | — | — |
| 2003 | 86° | 59° | 73° | — | — |
| 2002coldest | 70° | 61° | 65° | — | — |
| 2001 | 95° | 66° | 81° | — | — |
| 2000 | 95° | 68° | 82° | — | — |
| 1999 | 95° | 63° | 79° | — | — |
| 1998 | 89° | 59° | 74° | — | — |
| 1997 | 90° | 66° | 78° | — | — |
| 1996 | 91° | 59° | 75° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA