Climate Regions of New England: Four Distinct Zones

New England's climate varies significantly across its 6 states due to latitude, elevation, and coastal proximity:

1. Northern New England

Maine (north), northern Vermont, northern New Hampshire
Humid continental (Dfb): Long, cold winters (Jan avg 10-20°F / -12 to -7°C), short cool summers (Jul avg 60-70°F / 16-21°C). Heavy snow (100-200"+). Growing season 90-130 days.

2. Southern New England

Connecticut, Rhode Island, eastern Massachusetts, southern NH/VT
Humid subtropical transition (Cfa/Dfa): Hot, humid summers (Jul avg 70-75°F / 21-24°C), cold snowy winters (Jan avg 20-30°F / -7 to -1°C). Growing season 160-200 days. Nor'easters, occasional hurricanes.

3. Western New England

Berkshires, Green Mountains, White Mountains, western slopes
Highland continental (Dfb/Dfc): Elevation-driven. Colder, wetter, snowier than surroundings. Short summers, severe winters. Orographic precipitation. Alpine zones on highest peaks.

4. Coastal New England

Immediate coastline: Maine to Connecticut
Marine moderated (Cfb/Dfb): Milder winters (ocean heat), cooler summers (sea breezes), less snow, more fog. Narrow band (5-20 km inland). Microclimates in bays, islands, peninsulas.

Climate Change Shifts

• Growing seasons lengthening 10-14 days since 1970.
• Winter warming fastest — less snow, more rain.
• Extreme precipitation events increasing.
• Gulf of Maine warming 99% faster than global ocean — affects fisheries, storms.