The climate of New England varies greatly across its 500-mile (800 km) span from northern Maine to southern Connecticut. Maine, Vermont, New Hampshire, and most of interior Massachusetts have a humid continental climate (Dfb under the Köppen climate classification). In this region, the winters are long, cold, and heavy snow is common (most locations in this region receive 60 to 120 inches or 1.52 to 3.05 metres of snow annually). The summer months are moderately warm, though summer in this region is rather short. Annual rainfall has historically been spread evenly throughout the year, although climate change may be partly responsible for increasingly frequent droughts in the region during the summer months. Cities like Bangor, Maine; Portland, Maine; Manchester, New Hampshire; Burlington,