Weather on January 3
Simi Valley, CA
55 Years of Data
Avg High
64°F
Avg Low
50°F
Warmest
2003
71°F avg
Coldest
2004
45°F avg
About This Date
January 3rd in Simi Valley, CA typically brings mild winter weather, with average highs around 64°F and lows near 50°F. Over 31 years of records, the warmest January 3rd was in 2003 (71°F average), while the coldest was 2004 (45°F) — a 26°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for January 3rd in Simi Valley, CA? Great weather for outdoor activities.
Cooling Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 54° | 52° | 53° | — | — |
| 2025 | 69° | 49° | 59° | — | — |
| 2024 | 54° | 47° | 50° | — | — |
| 2023 | 52° | 44° | 48° | — | — |
| 2022 | 62° | 48° | 55° | — | — |
| 2021 | 61° | 45° | 53° | — | — |
| 2020 | 74° | 57° | 65° | — | — |
| 2019 | 64° | 48° | 56° | — | — |
| 2018 | 71° | 64° | 68° | — | — |
| 2017 | 51° | 43° | 47° | — | — |
| 2016 | 58° | 48° | 53° | — | — |
| 2015 | 59° | 43° | 51° | — | — |
| 2014 | 80° | 58° | 69° | — | — |
| 2013 | 63° | 51° | 57° | — | — |
| 2012 | 81° | 59° | 70° | — | — |
| 2011 | 50° | 41° | 46° | — | — |
| 2010 | 75° | 57° | 66° | — | — |
| 2009 | 57° | 45° | 51° | — | — |
| 2008 | 63° | 52° | 57° | — | — |
| 2007 | 70° | 46° | 58° | — | — |
| 2006 | 57° | 45° | 51° | — | — |
| 2005 | 52° | 39° | 45° | — | — |
| 2004coldest | 52° | 39° | 45° | — | — |
| 2003warmest | 79° | 63° | 71° | — | — |
| 2002 | 59° | 52° | 55° | — | — |
| 2001 | 74° | 63° | 68° | — | — |
| 2000 | 64° | 45° | 54° | — | — |
| 1999 | 69° | 60° | 65° | — | — |
| 1998 | 64° | 45° | 54° | — | — |
| 1997 | 66° | 51° | 59° | — | — |
| 1996 | 67° | 50° | 58° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA