Why is Virginia hot? Causes and heat countermeasures in Virginia, USA

Virginia on the U.S. East Coast experiences strong humidity and heat in summer, while there are cooler areas in the inland mountainous regions. Due to the state’s diverse terrain and climate, the feeling of heat and countermeasures vary by region. Below, we explain in detail the causes of the heat, effective heat countermeasures, and cool spots.

1. Causes of Heat in Virginia

1-1. Humid Subtropical Climate

• Most of the state belongs to a humid subtropical climate, resulting in hot and humid summers.
• The average high temperature in July and August is around 30°C (86°F), and high humidity makes the heat feel even stronger.

1-2. Moisture from the Atlantic Ocean and Gulf of Mexico

• Warm, moist air flows in from the Atlantic Ocean and the Gulf of Mexico, increasing humidity.
• High humidity suppresses sweat evaporation, intensifying the feeling of mugginess.

1-3. Urban Heat Island Effect

• In cities such as Richmond and Norfolk, paved surfaces and buildings retain heat, causing nighttime temperatures to remain high.

1-4. Influence of Terrain

• The Appalachian Mountains foothills in western Virginia help moderate heat compared to flatlands, but coastal and lowland areas tend to trap heat.

2. Heat Countermeasures

2-1. Individual Level

• Avoid direct sunlight during the day (11 a.m. to 4 p.m.).
• Stay well hydrated and replenish electrolytes with sports drinks.
• Wear breathable, lightweight clothing, hats, and use sunscreen.

2-2. Home and Building

• Use blackout curtains or blinds to block direct sunlight.
• Use air conditioning and fans to regulate temperature and humidity.
• Ventilate by opening windows during cooler, less humid times at night.

2-3. Community and Administration

• Set up and utilize cooling centers.
• Issue heat advisories and provide public information.

3. Cool Spots (Summer Retreats)

3-1. Western Appalachian Mountains

• The mountainous areas in western Virginia (around Charlottesville and near the Great Smoky Mountains) are at higher elevations and remain cool even in summer.
• Opportunities for outdoor activities such as hiking and camping.

3-2. Shenandoah Valley

• A valley surrounded by mountains with large temperature differences between day and night, especially cool in mornings and evenings.
• Shenandoah National Park is a popular summer retreat.

3-3. Atlantic Coast Beach Resorts

• Coastal areas such as Virginia Beach benefit from cooling sea breezes, though humidity remains high.
• Swimming and water sports help ease the heat.

4. Summary