The best time to visit Belen, New Mexico, is during the spring (late March to May) and autumn (September to October) months.During these periods, the weather is pleasantly mild, with warm days and cool evenings, making it ideal for exploring the area's outdoor attractions without the intense heat of summer. You'll find it comfortable for strolling through local markets or visiting the nearby nature preserves.For those interested in local culture and community events, autumn is particularly appealing.