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Simi Valley, CA Weather on May 25
May 25th in Simi Valley, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 52°F. Over 30 years of records, the warmest May 25th was in 2020 (76°F average), while the coldest was 2008 (53°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
What to Expect on May 25
Planning for May 25th in Simi Valley, CA? Great weather for outdoor activities.
May 25 Weather Records for Simi Valley
- •The all-time record high for May 25th in Simi Valley, CA is 94°F, set in 2020.
- •The coldest May 25th on record dropped to 46°F in 2008.
- •Temperatures have reached 90°F or higher on May 25th in 3 of the last 30 years.
Frequently Asked Questions
What was the warmest May 25 ever in Simi Valley?
The warmest May 25 in Simi Valley, CA reached 94°F in 2020. That is 21°F above the long-term average high of 73°F.
What was the coldest May 25 ever in Simi Valley?
The coldest May 25 in Simi Valley, CA dropped to 46°F in 2008. That is 6°F below the long-term average low of 52°F.
What is the average temperature on May 25 in Simi Valley?
On May 25, Simi Valley averages a high of 73°F and a low of 52°F based on 30 years of NOAA weather observations from SIMI VALLEY CALIFORNIA.
How many years of weather data are available for May 25 in Simi Valley?
We have 30 years of weather records for May 25 in Simi Valley, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
May 25 Weather History in Simi Valley
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 79°F | 52°F | -- | -- |
| 2024 | 70°F | 47°F | -- | -- |
| 2023 | 64°F | 51°F | -- | -- |
| 2022 | 93°F | 54°F | -- | -- |
| 2021 | 90°F | 63°F | -- | -- |
| 2020 | 94°F | 58°F | -- | -- |
| 2019 | 73°F | 49°F | -- | -- |
| 2018 | 66°F | 49°F | -- | -- |
| 2017 | 66°F | 50°F | -- | -- |
| 2016 | 66°F | 50°F | -- | -- |
| 2015 | 72°F | 52°F | -- | -- |
| 2014 | 81°F | 56°F | -- | -- |
| 2013 | 77°F | 50°F | -- | -- |
| 2012 | 64°F | 50°F | -- | -- |
| 2011 | 70°F | 50°F | -- | -- |
| 2010 | 66°F | 47°F | -- | -- |
| 2009 | 68°F | 52°F | -- | -- |
| 2008 | 61°F | 46°F | -- | -- |
| 2007 | 72°F | 54°F | -- | -- |
| 2006 | 75°F | 55°F | -- | -- |
| 2005 | 73°F | 55°F | -- | -- |
| 2004 | 64°F | 52°F | -- | -- |
| 2003 | 63°F | 54°F | -- | -- |
| 2002 | 70°F | 52°F | -- | -- |
| 2001 | 85°F | 57°F | -- | -- |
| 2000 | 60°F | 54°F | -- | -- |
| 1999 | 85°F | 56°F | -- | -- |
| 1998 | 68°F | 50°F | -- | -- |
| 1997 | 79°F | 54°F | -- | -- |
| 1996 | 72°F | 50°F | -- | -- |
Based on 30 years of data from NOAA station: SIMI VALLEY CALIFORNIA
Monthly Climate Averages
Historical temperature and precipitation averages for Simi Valley, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.