Mostaganem's climate is characterized by mild winters, with temperatures ranging from just above freezing in January and December to a pleasant average of around 15°C in February and March. Spring brings rapid warming, with April and May averaging over 20°C, while summer months are hot and dry, with July and August often reaching scorching highs above 40°C. Autumn is cooler, but still mild, with temperatures dipping back down to averages around 15°C by November. The coldest month on record is January, while the warmest is usually July or August. Overall, Mostaganem's climate is generally pleasant year-round, with minimal extremes in temperature.