Hottest cities in the United States are found mainly within five states.
These states include Hawaii, Florida, Texas, Arizona and California.
Other states contain cities that experience warm weather, but not as hot as these five.
Florida and Hawaii experience the highest average monthly temperature all year, with some towns never dipping below 70 °F during the day, even in the coldest month.
In this post, I’ll tell you about the hottest cities in the United States, where the daily average temperature is at least 75 degrees Fahrenheit.
So, let’s dive straight into the hottest cities in the United States.
15 Hottest Cities in the United States
The top 15 hottest cities in the United States with the highest average temperature (measured as yearlong daily mean temperature) are listed below.
If you enjoy the warmer temperatures and wish to live somewhere warm all year, all of these locations are excellent for you.
Key West, Florida (78.85°F)
Key West in the Florida Keys is the hottest city in the United States.
It is not only the hottest city, but also one of the sunniest.
It receives 3,404 hours of sunlight per year.
Even in the driest month, the sun shines at least 70% of the time.
High temperatures are frequently experienced due to high humidity.
Hurricanes are another weather-related threat that must be considered.
In January, the average day temperature is 75.8 degrees Fahrenheit.
In July, the average day temperature is 90.2 °F.
Marathon, Florida (78.8°F)
Marathon is yet another little town in Florida’s Keys.
It is one of the hottest cities in the United States.
It has almost identical hot weather like Key West.
Because neither Key West nor Marathon have huge populations, neither offers a lot of art and culture events.
Summers in Marathon are lengthy, hot, oppressive, damp, and mainly cloudy, whereas winters are short, pleasant, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 65°F to 90°F, with temperatures rarely falling below 55°F or rising over 93°F.
North Miami, Florida (78.5°F)
North Miami is a Miami suburb located around 11 miles north of downtown Miami.
It’s somewhat warmer than Miami, according to Weather.com climate statistics making it among the hottest places in the United States.
Miami is America’s sexiest city that is also a proper huge metropolis.
Because of the urban heat island effect, some regions in the Keys may be much hotter than the cities.
Summers in North Miami are lengthy, hot, oppressive, damp, and mainly cloudy, while winters are short, pleasant, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 61°F to 90°F, with temperatures rarely falling below 49°F or rising over 92°F.
In January, the average day temperature is 75°F.
In July, the average day temperature is 92°F.
Honolulu, Hawaii (78.05°F)
Honolulu is the warmest city in Hawaii and the second hottest large city in the United States.
While its average temperature is lower than in Key West, Honolulu has pleasant weather all year, with temperatures exceeding 80 degrees Fahrenheit even in the coldest month.
Honolulu has a semi-arid climate as well.
This vibrant city has much more to offer than just surfing.
Honolulu attracts a lot of visitors and new inhabitants for a reason.
Aside from great weather and water activities, it has world-class restaurants, cultural institutions, and a variety of tourist sites.
In January, the average daytime temperature is 80.5 degrees Fahrenheit.
In July, the average daytime temperature is 88.1°F.
Kailua-Kona, Hawaii (77.95°F)
Kailua-Kona is Hawaii’s second warmest city and among the hottest cities in the United States.
It is situated on the island of Hawaii and has warmer temperatures than Honolulu between December and February.
Kailua-Kona’s weather is warm, muggy, and partly cloudy.
Throughout the year, the temperature normally ranges from 68°F to 87°F, with temperatures rarely falling below 65°F or rising over 89°F.
In January, the average daytime temperature is 81.6°F.
In July, the average daytime temperature is 86 degrees Fahrenheit.
Islamorada, Florida (77.9°F)
Islamorada is another Florida Keys city that benefits from the hot tropical savanna climate.
It’s among the hottest cities in the United States.
Summers in Islamorada are lengthy, hot, oppressive, wet, and mainly cloudy, whereas winters are short, pleasant, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 64°F to 90°F, with temperatures rarely falling below 53°F or rising over 92°F.
In January, the average daytime temperature is 72.5 degrees Fahrenheit.
In July, the average daytime temperature is 88.7 °F.
Miami, Florida (77.45°F)
Miami is the hottest of the United States’ major cities.
More than 6 million individuals live in the urban area.
Because of the cooler nights, Miami has a lower average temperature than the cities in the Keys.
It is undoubtedly the most cosmopolitan city in this list, with a reputation for cultural melting pot.
Summers in Miami are hot, oppressive, damp, and mainly gloomy, while winters are cool, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 62°F to 90°F, with temperatures rarely falling below 50°F or rising over 92°F.
In January, the average daytime temperature is 76.2°F.
In July, the average daytime temperature is 90.6 degrees Fahrenheit.
McAllen, Texas (77.35°F)
McAllen is Texas’ hottest city. It’s one of the few hottest cities in the United States that isn’t in Florida or Hawaii.
The city of McAllen has a hot semi-arid climate; therefore, it is hot even in the winter.
While Florida is hotter than Texas, McAllen is hotter than some of Florida’s hottest areas.
Summers in McAllen are hot and humid; winters are short, chilly, and dry; and it is windy and partly cloudy all year.
Throughout the year, the temperature normally ranges from 52°F to 97°F, with temperatures rarely falling below 39°F or rising over 102°F.
In January, the average daytime temperature is 72.8°F.
In July, the average daytime temperature is 98.5 degrees Fahrenheit.
Doral, Florida (77.25°F)
Doral is a city that is part of the Miami metropolitan area.
It is slightly cooler than downtown Miami and North Miami but features among the hottest cities in the United States.
Summers in Doral are lengthy, hot, unpleasant, damp, and mainly cloudy, whereas winters are short, pleasant, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 61°F to 90°F, with temperatures rarely falling below 48°F or rising over 92°F.
In January, the average day temperature is 75.3°F.
In July, the average day temperature is 92.3°F.
Pompano Beach, Florida (77.2°F)
Pompano Beach is about 15 miles north of Fort Lauderdale.
Both communities have nearly identical climates, with Pompano Beach having an indistinguishable 0.05 °F higher average temperature.
The summers in Pompano Beach are hot, oppressive, damp, and mainly cloudy, while the winters are short, comfortable, humid, windy, and generally clear.
The temperature normally ranges from 61°F to 89°F throughout the year, rarely falling below 47°F or rising above 92°F.
In January, the average daytime temperature is 76.3 °F.
In July, the average daytime temperature is 90.5 °F.
Fort Lauderdale, Florida (77.15°F)
If we omit the surrounding communities of Miami, Fort Lauderdale is the second hottest major city in Florida.
Summers in Fort Lauderdale are lengthy, hot, oppressive, wet, and mainly gloomy, while winters are short, pleasant, humid, windy, and mostly clear.
The temperature normally ranges from 61°F to 89°F throughout the year, rarely falling below 47°F or rising above 92°F.
In January, the average daytime temperature is 75.6 °F.
In July, the average daytime temperature is 90 degrees Fahrenheit.
Kahului, Hawaii (77.1°F)
Kahului is a census-designated place (CDP) on the Hawaiian island of Maui.
It gets hotter temperatures than Honolulu between December and February, as does Kailua-Kona.
Kahului’s weather is warm, muggy, breezy, and generally clear.
Throughout the year, the temperature normally ranges from 64°F to 87°F, with temperatures rarely falling below 58°F or rising over 90°F.
In January, the average daytime temperature is 82.2 °F.
In July, the average daytime temperature is 89.2 degrees Fahrenheit.
Kalaeloa, Hawaii (77°F)
Kalaeloa is a census-designated place located west of Honolulu on the island of Oahu.
Summers are hot, humid, and dry; winters are mild; and it is windy and mainly clear all year.
Throughout the year, the temperature normally ranges from 66°F to 88°F, with temperatures rarely falling below 60°F or rising over 90°F.
In January, the average daytime temperature is 80.9 °F.
In July, the average daytime temperature is 88 degrees Fahrenheit.
Kailua, Hawaii (76.95°F)
Kailua is a census-designated place on the island of Oahu, located on the windward shore at Kailua Bay.
It has milder summers than Honolulu.
Kailua’s weather is warm, muggy, breezy, and generally clear.
Throughout the year, the temperature normally ranges from 69°F to 84°F, with temperatures rarely falling below 65°F or rising over 86°F.
In January, the average daytime temperature is 80 degrees Fahrenheit.
In July, the average daytime temperature is 85 degrees Fahrenheit.
Opa-locka, Florida (76.9 °F)
Opa-locka is another city in the Miami metropolitan area.
According to NOAA climate data, it has colder nights than Miami, resulting in a lower average temperature.
The summers in Opa-locka are scorching, long, oppressive, wet, and mainly cloudy, whereas the winters are short, comfortable, humid, windy, and mostly clear.
Throughout the year, the temperature normally ranges from 60°F to 90°F, with temperatures rarely falling below 47°F or rising over 92°F.
In January, the average daytime temperature is 76.7 °F.
In July, the average daytime temperature is 90.8 °F.
Final Thoughts on Hottest Cities in the United States
In conclusion, the United States is home to some of the hottest cities in the world, with many of them located in the south and southwest regions.
These cities experience scorching temperatures during summer months, making them a challenge for those who are not used to the heat.
If you’re planning to visit one of these cities, do not forget to check out their average high temperatures from the above list.
Frequently Asked Questions
What is the hottest city in the United States?
Key West, Florida, is the hottest city in the United States. Its daily mean temperature of 78.85 °F makes it even hotter than Honolulu, Hawaii's warmest city.
Which US cities have the hottest summers?
Summers in Arizona cities are the hottest, with the highest average temperatures. Yuma (which has the most sunshine hours per year in the globe, reaching 4,015 hours), Phoenix, and Glendale have the highest temperatures, reaching 106-107 °F in the hottest month. Other places with the hottest summer weather include California's desert cities of Indio, Palm Desert, and Palm Springs. Summers in Las Vegas, Nevada, can reach 105 degrees Fahrenheit.
What are the hottest cities in the US during winter?
Key West, Marathon, and North Miami in Florida have the warmest winters in the contiguous United States (76-78 °F during the day between December and February). Aside from that, Honolulu and Kailua-Kona in Hawaii enjoy even higher temperatures, ranging from 81 to 82 degrees Fahrenheit.
What are the hottest most humid cities in the US?
Key West, Florida has extremely high humidity all year and the highest temperatures in the United States. Marathon, which is likewise located in the Florida Keys, is another hot and humid city.
What is the hottest place in the US at Christmas?
Pompano Beach, Florida, is the hottest place in the contiguous United States at Christmas. In December, the average daytime temperature is 78.3 °F. Overall, Kahului, Hawaii, wins the top rank in the United States, with average high temperatures of 83.3 °F in December.