December in Mostaganem averages a daily high of 17.2°C with nights around 7.4°C. Expect roughly 7.5 wet days totalling 55mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Mostaganem is April–June.
Based on MOSTAGANEM, AG (5.9km), 1995–2024. 15 years of December data.