December in Maryvale averages a daily high of 19°C with nights around 5.3°C. Expect roughly 3.3 wet days totalling 17.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Maryvale is November–March.
Based on YOUNGTOWN, AZ US (15.3km), 1995–2024. 28 years of December data.