Why is New Jersey, USA, hot? Causes and heat countermeasures.

New Jersey on the U.S. East Coast is known for high heat and humidity during summer. Being Atlantic coastal and having many urban areas, the feeling of heat and countermeasures vary by region. Here we explain in detail the reasons why New Jersey gets hot, how to deal with the heat, and cool places to visit.

1. Reasons Why New Jersey Gets Hot

1-1. Humid Atlantic Coastal Climate

• New Jersey has a humid Atlantic coastal climate, characterized by temperatures over 30°C (86°F) and high humidity in summer.
• High humidity makes sweat evaporate less easily, significantly raising the apparent temperature (heat index).

1-2. Warm and Moist Airflows from the Gulf of Mexico and Atlantic

• In summer, warm and moist air flows in from the Gulf of Mexico and Atlantic Ocean, intensifying the muggy heat.
• Afternoon thunderstorms often occur, temporarily lowering temperature but humidity remains high.

1-3. Urban Heat Island Effect

• Areas developed as part of the New York metropolitan area (Newark, Jersey City, etc.) accumulate heat in asphalt and buildings, making nighttime temperatures slow to drop.

1-4. Heat Retention Due to Terrain

• Inland flatlands often have poor ventilation, causing heat to accumulate during the day.

2. Heat Countermeasures

2-1. Personal Measures

• Frequent hydration and salt intake.
• Wear breathable, ventilated clothing, hats, and sunscreen.
• Avoid going outdoors during high heat risk times from noon to 3 p.m.

2-2. At Home and Facilities

• Use blackout curtains or blinds to reduce indoor heat.
• Control humidity and temperature by combining air conditioning and dehumidifiers.
• Increase outdoor planting to create shade and mitigate heat island effects.

2-3. Community and Government Efforts

• Establish and promote cooling centers (public heat-relief facilities).
• Conduct heatstroke prevention awareness activities targeting elderly and children.
• Issue heat warnings and provide guidance on countermeasures.

3. Cool Spots (Places to Escape the Heat)

3-1. Jersey Shore

• Beach areas facing the Atlantic Ocean (Asbury Park, Point Pleasant, etc.) have sea breezes that lower the perceived temperature despite high humidity.
• Walking along the coast or swimming can provide relief from the heat.

3-2. Northern Mountain and Forest Areas

• The northwestern extension of the Catskill Mountains and the Pocono Mountains area have higher elevation and remain cool even in summer.
• These natural spots are great for hiking and camping.

3-3. Riverside and Lakeside Areas

• Along the Delaware River and around Lake Hopatcong, waterside breezes offer a cooling effect.

Summary