Why does New Hampshire, USA, get hot? Causes and ways to cope with the heat.

New Hampshire in the northeastern U.S. is generally known for its relatively cool summers, but there are occasional hot days exceeding 30°C (86°F). Humidity is moderate, sometimes causing a muggy feeling. Here, we explain in detail the reasons New Hampshire gets hot, how to cope with the heat, and cool places to visit.

1. Reasons Why New Hampshire Gets Hot

1-1. Influence of Humid Continental Climate

• New Hampshire has a humid continental climate, with summer temperatures ranging from about 25 to 33°C (77 to 91°F).
• The presence of humidity makes the apparent temperature feel higher than the actual temperature on sunny days.

1-2. Moist Air from the Atlantic Ocean

• Moist air flows in from the Atlantic Ocean, often increasing humidity.
• This effect is especially strong in the southern and eastern parts, intensifying the muggy heat.

1-3. Heat Retention in Inland Basins and Plains

• Basins and plains surrounded by lakes and rivers tend to trap heat during the day and experience slow cooling at night.

1-4. Urban Heat Island Effect

• Urban areas such as Concord and Manchester absorb heat in asphalt and buildings, suppressing nighttime temperature drops.

2. Heat Countermeasures

2-1. Personal Measures

• Drink water frequently and be mindful of salt intake, especially during outdoor activities.
• Wear light, breathable clothing, hats, and sunglasses.
• Avoid outdoor activities during the hottest hours of the day (1 p.m. to 4 p.m.).

2-2. At Home and Facilities

• Use blackout curtains or blinds to block direct sunlight and prevent indoor temperature rises.
• Use fans or air conditioning and manage humidity.
• Open windows at night to let in cool air.

2-3. Community Efforts

• Establish public cooling centers and conduct heatstroke awareness campaigns.
• Provide warnings and support for the elderly and children.

3. Cool Spots (Places to Escape the Heat)

3-1. White Mountains

• The White Mountains in the northern part of the state have high elevation and are popular as cool summer retreats.
• Hiking and climbing offer opportunities to enjoy nature and cool down.

3-2. Lakes Within the State

• Areas around Lake Winnipesaukee and nearby lakes offer cooler waterside breezes.
• Water sports such as boating and canoeing are popular.

3-3. Forest Parks and Nature Reserves

• With abundant forests providing ample shade, forest bathing is a great way to stay cool.
• Example: Pawtuckaway State Park.

Summary