Weather on January 20
Simi Valley, CA
55 Years of Data
Avg High
64°F
Avg Low
47°F
Warmest
2009
73°F avg
Coldest
2010
4°F avg
About This Date
January 20th in Simi Valley, CA typically brings mild winter weather, with average highs around 64°F and lows near 47°F. Over 31 years of records, the warmest January 20th was in 2009 (73°F average), while the coldest was 2010 (4°F) — a 69°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for January 20th in Simi Valley, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 76° | 62° | 69° | — | — |
| 2025 | 60° | 43° | 51° | — | — |
| 2024 | 53° | 48° | 51° | — | — |
| 2023 | 56° | 42° | 49° | — | — |
| 2022 | 71° | 60° | 66° | — | — |
| 2021 | 66° | 56° | 61° | — | — |
| 2020 | 60° | 49° | 54° | — | — |
| 2019 | 70° | 51° | 60° | — | — |
| 2018 | 56° | 44° | 50° | — | — |
| 2017 | 51° | 43° | 47° | — | — |
| 2016 | 64° | 52° | 58° | — | — |
| 2015 | 64° | 49° | 56° | — | — |
| 2014 | 79° | 61° | 70° | — | — |
| 2013 | 76° | 57° | 66° | — | — |
| 2012 | 61° | 41° | 51° | — | — |
| 2011 | 71° | 59° | 65° | — | — |
| 2010coldest | 49° | -40° | 4° | — | — |
| 2009warmest | 79° | 68° | 73° | — | — |
| 2008 | 61° | 41° | 51° | — | — |
| 2007 | 57° | 46° | 52° | — | — |
| 2006 | 64° | 45° | 54° | — | — |
| 2005 | 75° | 55° | 65° | — | — |
| 2004 | 55° | 43° | 49° | — | — |
| 2003 | 66° | 48° | 57° | — | — |
| 2002 | 64° | 45° | 54° | — | — |
| 2001 | 69° | 52° | 60° | — | — |
| 2000 | 64° | 51° | 58° | — | — |
| 1999 | 56° | 51° | 53° | — | — |
| 1998 | 60° | 45° | 52° | — | — |
| 1997 | 55° | 44° | 50° | — | — |
| 1996 | 68° | 46° | 57° | — | — |
31 years of data from SIMI VALLEY CALIFORNIA