Weather on May 28
Simi Valley, CA
55 Years of Data
Avg High
77°F
Avg Low
54°F
Warmest
1997
86°F avg
Coldest
2008
55°F avg
About This Date
May 28th in Simi Valley, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 54°F. Over 30 years of records, the warmest May 28th was in 1997 (86°F average), while the coldest was 2008 (55°F) — a 31°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for May 28th in Simi Valley, CA? Great weather for outdoor activities.
Cooling Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 52° | 65° | — | — |
| 2024 | 80° | 50° | 65° | — | — |
| 2023 | 61° | 51° | 56° | — | — |
| 2022 | 67° | 52° | 59° | — | — |
| 2021 | 82° | 52° | 67° | — | — |
| 2020 | 90° | 59° | 74° | — | — |
| 2019 | 76° | 48° | 62° | — | — |
| 2018 | 82° | 53° | 68° | — | — |
| 2017 | 83° | 55° | 69° | — | — |
| 2016 | 78° | 52° | 65° | — | — |
| 2015 | 84° | 54° | 69° | — | — |
| 2014 | 90° | 57° | 73° | — | — |
| 2013 | 82° | 55° | 69° | — | — |
| 2012 | 79° | 57° | 68° | — | — |
| 2011 | 70° | 52° | 61° | — | — |
| 2010 | 69° | 49° | 59° | — | — |
| 2009 | 72° | 57° | 64° | — | — |
| 2008coldest | 66° | 45° | 55° | — | — |
| 2007 | 68° | 50° | 59° | — | — |
| 2006 | 75° | 55° | 65° | — | — |
| 2005 | 70° | 57° | 63° | — | — |
| 2004 | 68° | 54° | 61° | — | — |
| 2003 | 88° | 61° | 74° | — | — |
| 2002 | 70° | 48° | 59° | — | — |
| 2001 | 71° | 53° | 62° | — | — |
| 2000 | 96° | 66° | 81° | — | — |
| 1999 | 84° | 53° | 69° | — | — |
| 1998 | 65° | 48° | 56° | — | — |
| 1997warmest | 98° | 74° | 86° | — | — |
| 1996 | 76° | 49° | 62° | — | — |
30 years of data from SIMI VALLEY CALIFORNIA