January in Placentia averages a daily high of 21.4°C with nights around 9.2°C. Expect roughly 5.8 wet days totalling 80.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Placentia is March–June.
Based on ANAHEIM, CA US (2.7km), 1995–2024. 29 years of January data.