The 10 Hottest States in the U.S., Ranked

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Some people dream of endless sunshine and warm weather year-round, while others struggle to escape the intense summer heat. Across the United States, certain states consistently experience scorching temperatures, high humidity, and long summers that push residents indoors for air conditioning relief.

As climate patterns continue to shift and global temperatures rise, understanding which states experience the hottest weather has become increasingly important for homeowners, travelers, and people considering relocation.

Here’s a closer look at the hottest states in America based primarily on average summer temperatures, humidity levels, and overall heat intensity.

The 10 Hottest States in the U.S.

1. Texas
2. Louisiana
3. Florida
4. Mississippi
5. Oklahoma
6. Georgia
7. Arizona
8. South Carolina
9. Alabama
10. Arkansas

How Are the Hottest States Measured?

To rank the hottest states, average summer temperatures are usually the primary factor. This includes daily highs and lows between June and August. Humidity and heat index values also play a major role because high moisture levels can make temperatures feel far hotter than the thermometer suggests.

Annual temperatures matter too, but summer conditions are typically the biggest factor when determining how extreme a state's heat feels overall.

1. Texas

Texas consistently ranks as the hottest state in the country thanks to its massive size, flat terrain, desert regions, and Gulf Coast humidity.

• Average summer temperature: 82.5°F
• Average annual temperature: 66.2°F
• Record high: 120°F

West Texas experiences dry desert heat, while eastern and coastal regions face intense humidity. Cities like El Paso, Houston, and Corpus Christi often experience long periods of triple-digit temperatures during summer heat waves.

2. Louisiana

Louisiana combines high temperatures with extremely heavy humidity, creating dangerous heat index conditions during the summer months.

• Average summer temperature: 82°F
• Average annual temperature: 67.5°F
• Record high: 114°F

Its location along the Gulf of Mexico allows warm, moisture-rich air to dominate much of the year, especially in southern cities like New Orleans and Baton Rouge.

3. Florida

Florida is known for its tropical climate, warm winters, and humid summers. While temperatures may not always reach desert extremes, the humidity can make the heat feel overwhelming.

• Average summer temperature: 82°F
• Average annual temperature: 71.7°F
• Record high: 109°F

Ocean temperatures surrounding the state strongly influence Florida’s climate, helping maintain heat and humidity nearly year-round.

4. Mississippi

Mississippi experiences very warm summers with persistent humidity levels that often push heat indexes well above actual temperatures.

• Average summer temperature: 80.3°F
• Average annual temperature: 64.6°F
• Record high: 115°F

The state’s proximity to the Gulf of Mexico contributes heavily to its muggy climate and long, hot summers.

5. Oklahoma

Oklahoma sees dramatic weather swings throughout the year, but summers can become brutally hot due to southern winds carrying heat from Texas and the Gulf region.

• Average summer temperature: 80.3°F
• Average annual temperature: 60.7°F
• Record high: 120°F

Heat waves combined with severe storms and tornado activity make Oklahoma’s climate especially unpredictable.

6. Georgia

Georgia’s climate blends humid subtropical heat with occasional cooling influences from the Appalachian Mountains.

• Average summer temperature: 79.5°F
• Average annual temperature: 64.5°F
• Record high: 112°F

Cities such as Atlanta and Savannah regularly experience hot, humid summers with frequent afternoon thunderstorms.

7. Arizona

Arizona is famous for extreme desert heat, particularly in the southern half of the state where cities like Phoenix regularly exceed 110°F during summer.

• Average summer temperature: 79.5°F
• Average annual temperature: 61.4°F
• Record high: 128°F

Unlike southeastern states, Arizona’s heat is usually dry rather than humid, although temperatures can still become dangerous.

8. South Carolina

South Carolina experiences long summers filled with warm temperatures, heavy humidity, and strong sunshine.

• Average summer temperature: 79.4°F
• Average annual temperature: 63.6°F
• Record high: 113°F

Coastal areas like Myrtle Beach remain warm and humid for much of the year, while inland cities often experience hotter daytime temperatures.

9. Alabama

Alabama’s humid subtropical climate creates very hot summers paired with frequent thunderstorms and high moisture levels.

• Average summer temperature: 79.4°F
• Average annual temperature: 63.9°F
• Record high: 112°F

Its proximity to the Gulf Coast strongly impacts weather patterns and contributes to year-round warmth.

10. Arkansas

Arkansas rounds out the list with humid summers and consistent heat throughout much of the state.

• Average summer temperature: 79.3°F
• Average annual temperature: 61.4°F
• Record high: 120°F

While Arkansas experiences all four seasons, summer temperatures can become intense, especially during extended heat waves.

Why Heat Index Matters

Air temperature alone doesn’t always tell the full story. Humidity significantly impacts how hot weather feels to the human body.

For example:

• 95°F with low humidity may feel manageable
• 95°F with high humidity can feel like 110°F or higher

This is why many southeastern states rank among the hottest even when desert states occasionally record higher raw temperatures.

How Rising Temperatures Are Changing the U.S.

Recent years have brought record-breaking heat across many parts of the country. Longer heat waves, warmer nights, and higher ocean temperatures are increasing the frequency of extreme summer weather.

As a result:

• Energy costs are rising
• Heat-related health risks are increasing
• Wildfire danger is growing in western states
• Hurricanes and severe storms are becoming more intense

These climate trends are influencing where people choose to live and how cities prepare for future heat challenges.

Final Thoughts

The hottest states in the U.S. combine high temperatures, strong sunshine, and heavy humidity to create some of the most intense summer climates in the country. Texas, Louisiana, and Florida continue to top the list thanks to their long-lasting heat and warm annual temperatures.

Whether you love sunshine or prefer cooler weather, understanding regional climate patterns can help you make smarter decisions about travel, relocation, homeownership, and lifestyle planning.