Weather on January 31
Simi Valley, CA
55 Years of Data
Avg High
64°F
Avg Low
49°F
Warmest
2018
74°F avg
Coldest
2016
47°F avg
About This Date
January 31st in Simi Valley, CA typically brings mild winter weather, with average highs around 64°F and lows near 49°F. Over 31 years of records, the warmest January 31st was in 2018 (74°F average), while the coldest was 2016 (47°F) — a 27°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for January 31st in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 77° | 63° | 70° | — | — |
| 2025 | 62° | 44° | 53° | — | — |
| 2024 | 67° | 49° | 58° | — | — |
| 2023 | 55° | 45° | 50° | — | — |
| 2022 | 60° | 50° | 55° | — | — |
| 2021 | 65° | 49° | 57° | — | — |
| 2020 | 76° | 59° | 67° | — | — |
| 2019 | 53° | 49° | 51° | — | — |
| 2018warmest | 84° | 64° | 74° | — | — |
| 2017 | 71° | 57° | 64° | — | — |
| 2016coldest | 52° | 42° | 47° | — | — |
| 2015 | 66° | 51° | 59° | — | — |
| 2014 | 62° | 45° | 53° | — | — |
| 2013 | 74° | 53° | 63° | — | — |
| 2012 | 63° | 43° | 53° | — | — |
| 2011 | 65° | 46° | 55° | — | — |
| 2010 | 64° | 47° | 55° | — | — |
| 2009 | 77° | 52° | 64° | — | — |
| 2008 | 61° | 41° | 51° | — | — |
| 2007 | 57° | 45° | 51° | — | — |
| 2006 | 61° | 46° | 53° | — | — |
| 2005 | 66° | 54° | 60° | — | — |
| 2004 | 59° | 48° | 54° | — | — |
| 2003 | 88° | 59° | 73° | — | — |
| 2002 | 57° | 41° | 49° | — | — |
| 2001 | 56° | 46° | 51° | — | — |
| 2000 | 63° | 48° | 55° | — | — |
| 1999 | 51° | 45° | 48° | — | — |
| 1998 | 52° | 46° | 49° | — | — |
| 1997 | 77° | 56° | 66° | — | — |
| 1996 | 55° | 45° | 50° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA