December in Valley Glen averages a daily high of 19.2°C with nights around 7°C. Expect roughly 5.5 wet days totalling 50.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Valley Glen is April–June.
Based on BURBANK GLENDALE PASADENA AIRPORT, CA US (5.3km), 1995–2024. 27 years of December data.