The Hottest City in Every State


high temperatures
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Editor’s Note: This story originally appeared on Filterbuy.

With summer around the corner and the U.S. increasing COVID-19 vaccination rates, Americans are gearing up for the possibility of a more normal summer season. But while residents in the Northern U.S. typically enjoy comfortably warm temperatures, Americans in other parts of the country increasingly face months of extreme heat and other severe weather events. According to data from the National Oceanic and Atmospheric Administration (NOAA), some U.S. cities experience nearly 200 days per year with temperatures of 90 degrees Fahrenheit or higher, a figure that’s rising.

Many parts of the U.S. with already high summer temperatures are seeing their temperatures climb even higher as the Earth’s temperatures warm. In every year since 1977, global average temperatures have been higher than the 20th century global temperature average. And the difference from the average 20th century temperature has been steadily climbing.

In 2020, the global temperature average was 1.6 degrees Centigrade (2.84 degrees Fahrenheit) higher than the average temperature from the last century, making it the warmest year on record (tied with year 2016). The impacts of global climate change are already occurring in the form of sea ice depletion, faster rise in sea levels, and more intense heat waves. Scientists predict that global temperatures will continue to increase, although not uniformly, and much of the western and central parts of the U.S. will be subject to more frequent and extreme summer heat waves.

As the Earth warms overall, such high temperature extremes are becoming increasingly common. In 2020, 49% of the U.S. had maximum temperatures much above normal — that is, nearly half of the country had high temperatures in the upper 10th percentile of the local historical record. At the same time, cold temperature extremes have become less common. For example, in 2020, no part of the U.S. recorded low temperatures in the bottom 10th percentile.

At the state level, some states have had more marked increases in their average temperatures than others. Comparing data from the past year with the historical record, Rhode Island experienced the greatest average temperature increase, 3.6 degrees Fahrenheit, from the 20th century average temperature. Other states with similar increases include Maine, Arizona, Connecticut, Delaware, Massachusetts, California, and New Jersey. Only two states, Arkansas and Oklahoma, actually recorded slightly lower average temperatures than last century’s average, -0.2 degrees and -0.1 degrees lower, respectively.

To find the hottest city in every state, researchers at Filterbuy analyzed the latest data from NOAA. Within each state, the researchers ranked cities according to the greatest long-term average number of days per year when the temperature is 90 degrees or higher. Researchers also calculated the long-term average number of days per year when the temperature is 100 degrees or higher, the long-term average high temperature during the summer months, and the average long-term low temperature during summer. Only cities with populations of 10,000 or greater were considered in the analysis. (All temperatures are Fahrenheit unless otherwise stated.)

Alabama

Tuscaloosa Alabama
Tracy Burroughs Brown / Shutterstock.com
  • Hottest city: Tuscaloosa
  • Number of days per year with temperature above 90 degrees: 80
  • Number of days per year with temperature above 100 degrees: 5
  • Average summer maximum temperature: 91.9 degrees
  • Average summer minimum temperature: 70.7 degrees

Alaska

Fairbanks Alaska
Mikhail Varentsov / Shutterstock.com
  • Hottest city: Fairbanks
  • Number of days per year with temperature above 90 degrees: 0
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 70.6 degrees
  • Average summer minimum temperature: 48.9 degrees

Arizona

sherwood / Shutterstock.com
  • Hottest city: Yuma
  • Number of days per year with temperature above 90 degrees: 185
  • Number of days per year with temperature above 100 degrees: 124
  • Average summer maximum temperature: 107.5 degrees
  • Average summer minimum temperature: 73.8 degrees

Arkansas

Helena-West Helena Arkansas
SevenMaps / Shutterstock.com
  • Hottest city: Helena-West Helena
  • Number of days per year with temperature above 90 degrees: 100
  • Number of days per year with temperature above 100 degrees: 11
  • Average summer maximum temperature: 94.1 degrees
  • Average summer minimum temperature: 68.2 degrees

California

Indio California
Felix Mizioznikov / Shutterstock.com
  • Hottest city: Indio
  • Number of days per year with temperature above 90 degrees: 182
  • Number of days per year with temperature above 100 degrees: 117
  • Average summer maximum temperature: 105.7 degrees
  • Average summer minimum temperature: 78.3 degrees

Colorado

Greeley Colorado
Lawshots / Shutterstock.com
  • Hottest city: Greeley
  • Number of days per year with temperature above 90 degrees: 68
  • Number of days per year with temperature above 100 degrees: 12
  • Average summer maximum temperature: 90.9 degrees
  • Average summer minimum temperature: 56.2 degrees

Connecticut

Danbury Connecticut
Nancy Kennedy / Shutterstock.com
  • Hottest city: Danbury
  • Number of days per year with temperature above 90 degrees: 16
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 82.8 degrees
  • Average summer minimum temperature: 61.2 degrees

Delaware

Newark Delaware
Perry C / Shutterstock.com
  • Hottest city: Newark
  • Number of days per year with temperature above 90 degrees: 30
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 86.7 degrees
  • Average summer minimum temperature: 63.9 degrees

Florida

Lakeland, Florida
Sean Pavone / Shutterstock.com
  • Hottest city: Lakeland
  • Number of days per year with temperature above 90 degrees: 138
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 93.8 degrees
  • Average summer minimum temperature: 72.5 degrees

Georgia

Albany Georgia
Joseph Thomas Photography / Shutterstock.com
  • Hottest city: Albany
  • Number of days per year with temperature above 90 degrees: 89
  • Number of days per year with temperature above 100 degrees: 2
  • Average summer maximum temperature: 91.9 degrees
  • Average summer minimum temperature: 71.4 degrees

Hawaii

Honolulu, Hawaii
MNStudio / Shutterstock.com
  • Hottest city: Honolulu
  • Number of days per year with temperature above 90 degrees: 19
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 87.9 degrees
  • Average summer minimum temperature: 74.3 degrees

Idaho

Caldwell Idaho
CSNafzger / Shutterstock.com
  • Hottest city: Caldwell
  • Number of days per year with temperature above 90 degrees: 62
  • Number of days per year with temperature above 100 degrees: 14
  • Average summer maximum temperature: 90.5 degrees
  • Average summer minimum temperature: 56.7 degrees

Illinois

Carbondale, Illinois
SevenMaps / Shutterstock.com
  • Hottest city: Carbondale
  • Number of days per year with temperature above 90 degrees: 40
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 87.8 degrees
  • Average summer minimum temperature: 65.1 degrees

Indiana

Willard Library, Evansville, Indiana
Nyttend / Wikimedia
  • Hottest city: Evansville
  • Number of days per year with temperature above 90 degrees: 66
  • Number of days per year with temperature above 100 degrees: 3
  • Average summer maximum temperature: 90.6 degrees
  • Average summer minimum temperature: 68.8 degrees

Iowa

Burlington Iowa
Eddie J. Rodriquez / Shutterstock.com
  • Hottest city: Burlington
  • Number of days per year with temperature above 90 degrees: 25
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 85.2 degrees
  • Average summer minimum temperature: 65.0 degrees

Kansas

Liberal Kansas
SevenMaps / Shutterstock.com
  • Hottest city: Liberal
  • Number of days per year with temperature above 90 degrees: 73
  • Number of days per year with temperature above 100 degrees: 13
  • Average summer maximum temperature: 91.3 degrees
  • Average summer minimum temperature: 63.2 degrees

Kentucky

Glasgow Kentucky
TravelEatShoot / Shutterstock.com
  • Hottest city: Glasgow
  • Number of days per year with temperature above 90 degrees: 54
  • Number of days per year with temperature above 100 degrees: 2
  • Average summer maximum temperature: 89.6 degrees
  • Average summer minimum temperature: 65.3 degrees

Louisiana

Monroe, Louisiana
Jarred Armfield / Shutterstock.com
  • Hottest city: Monroe
  • Number of days per year with temperature above 90 degrees: 98
  • Number of days per year with temperature above 100 degrees: 7
  • Average summer maximum temperature: 93.3 degrees
  • Average summer minimum temperature: 70.9 degrees

Maine

Orono, Maine
Shawn Hill / Shutterstock.com
  • Hottest city: Orono
  • Number of days per year with temperature above 90 degrees: 8
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 78.9 degrees
  • Average summer minimum temperature: 56.7 degrees

Maryland

Port of Baltimore, Maryland tugboat
Cascade Creatives / Shutterstock.com
  • Hottest city: Baltimore
  • Number of days per year with temperature above 90 degrees: 61
  • Number of days per year with temperature above 100 degrees: 8
  • Average summer maximum temperature: 90.3 degrees
  • Average summer minimum temperature: 73.0 degrees

Massachusetts

Lowell, Massachusetts
Andriy Danylov / Shutterstock.com
  • Hottest city: Lowell
  • Number of days per year with temperature above 90 degrees: 15
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 81.9 degrees
  • Average summer minimum temperature: 57.6 degrees

Michigan

Dearborn Michigan
F Stop Bebop / Shutterstock.com
  • Hottest city: Dearborn
  • Number of days per year with temperature above 90 degrees: 14
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 82.7 degrees
  • Average summer minimum temperature: 60.2 degrees

Minnesota

Minneapolis, Minnesota
nikitsin.smugmug.com / Shutterstock.com
  • Hottest city: Minneapolis
  • Number of days per year with temperature above 90 degrees: 17
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 83.7 degrees
  • Average summer minimum temperature: 62.8 degrees

Mississippi

Hernando, Mississippi
SevenMaps / Shutterstock.com
  • Hottest city: Hernando
  • Number of days per year with temperature above 90 degrees: 92
  • Number of days per year with temperature above 100 degrees: 12
  • Average summer maximum temperature: 93.4 degrees
  • Average summer minimum temperature: 69.0 degrees

Missouri

Kennett Missouri
Dmitrijs Kaminskis / Shutterstock.com
  • Hottest city: Kennett
  • Number of days per year with temperature above 90 degrees: 63
  • Number of days per year with temperature above 100 degrees: 5
  • Average summer maximum temperature: 90.6 degrees
  • Average summer minimum temperature: 68.0 degrees

Montana

Billings Montana
Gary C. Tognoni / Shutterstock.com
  • Hottest city: Billings
  • Number of days per year with temperature above 90 degrees: 41
  • Number of days per year with temperature above 100 degrees: 3
  • Average summer maximum temperature: 86.3 degrees
  • Average summer minimum temperature: 54.2 degrees

Nebraska

Scottsbluff Nebraska
marekuliasz / Shutterstock.com
  • Hottest city: Scottsbluff
  • Number of days per year with temperature above 90 degrees: 40
  • Number of days per year with temperature above 100 degrees: 3
  • Average summer maximum temperature: 86.3 degrees
  • Average summer minimum temperature: 56.0 degrees

Nevada

Mesquite Nevada
Steve Lagreca / Shutterstock.com
  • Hottest city: Mesquite
  • Number of days per year with temperature above 90 degrees: 147
  • Number of days per year with temperature above 100 degrees: 100
  • Average summer maximum temperature: 105.2 degrees
  • Average summer minimum temperature: 74.3 degrees

New Hampshire

Hudson New Hampshire
Anthony Dezenzio / Shutterstock.com
  • Hottest city: Hudson
  • Number of days per year with temperature above 90 degrees: 11
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 80.5 degrees
  • Average summer minimum temperature: 56.4 degrees

New Jersey

Moorestown, New Jersey
Olga V Kulakova / Shutterstock.com
  • Hottest city: Moorestown
  • Number of days per year with temperature above 90 degrees: 37
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 87.2 degrees
  • Average summer minimum temperature: 61.7 degrees

New Mexico

Carlsbad New Mexico
Traveller70 / Shutterstock.com
  • Hottest city: Carlsbad
  • Number of days per year with temperature above 90 degrees: 105
  • Number of days per year with temperature above 100 degrees: 21
  • Average summer maximum temperature: 94.6 degrees
  • Average summer minimum temperature: 66.5 degrees

New York

New York City
Taiga / Shutterstock.com
  • Hottest city: New York
  • Number of days per year with temperature above 90 degrees: 17
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 83.2 degrees
  • Average summer minimum temperature: 67.4 degrees

North Carolina

Concord North Carolina
Scott Alan Ritchie / Shutterstock.com
  • Hottest city: Concord
  • Number of days per year with temperature above 90 degrees: 55
  • Number of days per year with temperature above 100 degrees: 2
  • Average summer maximum temperature: 89.3 degrees
  • Average summer minimum temperature: 67.3 degrees

North Dakota

Williston North Dakota
Tom Reichner / Shutterstock.com
  • Hottest city: Williston
  • Number of days per year with temperature above 90 degrees: 22
  • Number of days per year with temperature above 100 degrees: 2
  • Average summer maximum temperature: 81.7 degrees
  • Average summer minimum temperature: 53.2 degrees

Ohio

Dayton Ohio
Alex Balanov / Shutterstock.com
  • Hottest city: Dayton
  • Number of days per year with temperature above 90 degrees: 31
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 85.8 degrees
  • Average summer minimum temperature: 65.1 degrees

Oklahoma

Lawton Oklahoma
WillHuebie / Shutterstock.com
  • Hottest city: Lawton
  • Number of days per year with temperature above 90 degrees: 96
  • Number of days per year with temperature above 100 degrees: 27
  • Average summer maximum temperature: 95.3 degrees
  • Average summer minimum temperature: 70.0 degrees

Oregon

Medford, Oregon
Ahturner / Shutterstock.com
  • Hottest city: Medford
  • Number of days per year with temperature above 90 degrees: 54
  • Number of days per year with temperature above 100 degrees: 9
  • Average summer maximum temperature: 87.7 degrees
  • Average summer minimum temperature: 55.4 degrees

Pennsylvania

Philadelphia, downtown evening rush hour.
Sean Pavone / Shutterstock.com
  • Hottest city: Philadelphia
  • Number of days per year with temperature above 90 degrees: 32
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 86.2 degrees
  • Average summer minimum temperature: 68.3 degrees

Rhode Island

Warwick, Rhode Island
ShoreTie / Shutterstock.com
  • Hottest city: Warwick
  • Number of days per year with temperature above 90 degrees: 9
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 80.6 degrees
  • Average summer minimum temperature: 62.0 degrees

South Carolina

Columbia, South Carolina
Kevin Ruck / Shutterstock.com
  • Hottest city: Columbia
  • Number of days per year with temperature above 90 degrees: 95
  • Number of days per year with temperature above 100 degrees: 12
  • Average summer maximum temperature: 93.5 degrees
  • Average summer minimum temperature: 71.9 degrees

South Dakota

Pierre, South Dakota from above
Jacob Boomsma / Shutterstock.com
  • Hottest city: Pierre
  • Number of days per year with temperature above 90 degrees: 37
  • Number of days per year with temperature above 100 degrees: 6
  • Average summer maximum temperature: 85.4 degrees
  • Average summer minimum temperature: 59.2 degrees

Tennessee

Millington Tennessee
SevenMaps / Shutterstock.com
  • Hottest city: Millington
  • Number of days per year with temperature above 90 degrees: 70
  • Number of days per year with temperature above 100 degrees: 4
  • Average summer maximum temperature: 91.2 degrees
  • Average summer minimum temperature: 70.4 degrees

Texas

Rio Grande City Texas
SevenMaps / Shutterstock.com
  • Hottest city: Rio Grande City
  • Number of days per year with temperature above 90 degrees: 166
  • Number of days per year with temperature above 100 degrees: 44
  • Average summer maximum temperature: 98.1 degrees
  • Average summer minimum temperature: 75.3 degrees

Utah

Saint George, Utah
Steve Cukrov / Shutterstock.com
  • Hottest city: St. George
  • Number of days per year with temperature above 90 degrees: 116
  • Number of days per year with temperature above 100 degrees: 46
  • Average summer maximum temperature: 98.7 degrees
  • Average summer minimum temperature: 71.6 degrees

Vermont

Essex Vermont
Wangkun Jia / Shutterstock.com
  • Hottest city: Essex
  • Number of days per year with temperature above 90 degrees: 6
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 78.9 degrees
  • Average summer minimum temperature: 57.2 degrees

Virginia

Suffolk Virginia
O.C Ritz / Shutterstock.com
  • Hottest city: Suffolk
  • Number of days per year with temperature above 90 degrees: 46
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 88.4 degrees
  • Average summer minimum temperature: 66.2 degrees

Washington

Pasco Washington
Chad Hutchinson / Shutterstock.com
  • Hottest city: Pasco
  • Number of days per year with temperature above 90 degrees: 45
  • Number of days per year with temperature above 100 degrees: 5
  • Average summer maximum temperature: 88.1 degrees
  • Average summer minimum temperature: 54.5 degrees

West Virginia

Dee Browning / Shutterstock.com
  • Hottest city: Huntington
  • Number of days per year with temperature above 90 degrees: 28
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 86.0 degrees
  • Average summer minimum temperature: 64.4 degrees

Wisconsin

West Allis Wisconsin
Chris Hammerbeck / Shutterstock.com
  • Hottest city: West Allis
  • Number of days per year with temperature above 90 degrees: 16
  • Number of days per year with temperature above 100 degrees: 0
  • Average summer maximum temperature: 82.4 degrees
  • Average summer minimum temperature: 61.1 degrees

Wyoming

Riverton Wyoming
Michele Vacchiano / Shutterstock.com
  • Hottest city: Riverton
  • Number of days per year with temperature above 90 degrees: 30
  • Number of days per year with temperature above 100 degrees: 1
  • Average summer maximum temperature: 84.8 degrees
  • Average summer minimum temperature: 51.2 degrees

Detailed Findings & Methodology

Man in front of fan on computer
Monika Wisniewska / Shutterstock.com

Of the hottest cities in each state, Yuma, Arizona. boasts the highest number of days per year with temperatures above 90 degrees, at 185 days or over half the year. Yuma also has an astounding 124 days per year with temperatures over 100 degrees. On average, the hottest cities have 59 days per year with temperatures over 90 degrees and 13 days per year with temperatures over 100 degrees.

Summer high and low temperatures also vary substantially among the hottest cities. On average across all 50 cities, the average summer high temperature is 89 degrees and the average summer low temperature is 65 degrees. However, some cities have far hotter days. Yuma’s average high in summer is 108 degrees, while the average high summer temperature in Fairbanks, Alaska, is just 71 degrees. Besides more moderate temperatures during the day, Northern states also tend to have cooler nights and mornings during the summer. This is reflected in the average summer low temperatures. The average low temperature in the summer in Fairbanks is a brisk 49 degrees, while summer temperatures typically don’t fall much below 80 degrees in Indio, California.

To find the hottest city in every state, researchers at Filterbuy analyzed the latest data from the National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Information’s (NCEI) Climate Normals dataset. The Climate Normals are three-decade averages of climatological variables, including temperature and precipitation. Within each state, the researchers ranked cities according to the greatest long-term average number of days per year when the temperature is 90 degrees or higher. Researchers also calculated the long-term average number of days per year when the temperature is 100 degrees or higher, the long-term average high temperature in summer, and the average long-term low temperature in summer. Only cities with populations of 10,000 or greater were considered in the analysis.

Disclosure: The information you read here is always objective. However, we sometimes receive compensation when you click links within our stories.



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