Weather on April 28
Simi Valley, CA
55 Years of Data
Avg High
70°F
Avg Low
50°F
Warmest
2015
78°F avg
Coldest
2006
-40°F avg
About This Date
April 28th in Simi Valley, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 50°F. Over 30 years of records, the warmest April 28th was in 2015 (78°F average), while the coldest was 2006 (-40°F) — a 118°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for April 28th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
4.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 46° | 59° | — | — |
| 2024 | 75° | 53° | 64° | — | — |
| 2023 | 80° | 54° | 67° | — | — |
| 2022 | 71° | 50° | 61° | — | — |
| 2021 | 84° | 57° | 71° | — | — |
| 2020 | 89° | 63° | 76° | — | — |
| 2019 | 69° | 51° | 60° | — | — |
| 2018 | 72° | 51° | 61° | — | — |
| 2017 | 76° | 59° | 67° | — | — |
| 2016 | 67° | 44° | 55° | — | — |
| 2015warmest | 90° | 66° | 78° | — | — |
| 2014 | 84° | 56° | 70° | — | — |
| 2013 | 87° | 55° | 71° | — | — |
| 2012 | 77° | 52° | 64° | — | — |
| 2011 | 77° | 52° | 64° | — | — |
| 2010 | 63° | 48° | 55° | — | — |
| 2009 | 63° | 45° | 54° | — | — |
| 2008 | 90° | 63° | 76° | — | — |
| 2007 | 79° | 57° | 68° | — | — |
| 2006coldest | -40° | -40° | -40° | — | — |
| 2005 | 61° | 52° | 56° | — | — |
| 2004 | 73° | 55° | 64° | — | — |
| 2003 | 61° | 46° | 53° | — | — |
| 2002 | 66° | 45° | 55° | — | — |
| 2001 | 64° | 49° | 56° | — | — |
| 2000 | 64° | 53° | 59° | — | — |
| 1999 | 59° | 44° | 52° | — | — |
| 1998 | 88° | 64° | 76° | — | — |
| 1997 | 56° | 52° | 54° | — | — |
| 1996 | 84° | 52° | 68° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA