US cities with the strongest urban heat island effect

On a 90F day, this is how much cooler these cities would be without heat-amplifying factors of the built environment

82F

84F

86F

88F

90F

-9.6F

New York City

-9.1F

San Francisco

-9F

Newark, NJ

Chicago

-8.7F

-8.5F

Philadelphia

-8.5F

Washington DC

-8.5F

West Palm Beach, FL

-8.4F

Boston

-8.4F

Miami

-8.4F

Baltimore

82F

84F

86F

88F

90F

-9.6F

New York City

-9.1F

San Francisco

-9F

Newark, NJ

Chicago

-8.7F

-8.5F

Philadelphia

-8.5F

Washington DC

-8.5F

West Palm Beach, FL

-8.4F

Boston

-8.4F

Miami

-8.4F

Baltimore

82F

84F

86F

88F

90F

-9.6F

New York City

-9.1F

San Francisco

-9F

Newark, NJ

Chicago

-8.7F

-8.5F

Philadelphia

-8.5F

Washington DC

-8.5F

West Palm Beach, FL

-8.4F

Boston

-8.4F

Miami

-8.4F

Baltimore

82F

84F

86F

88F

90F

-9.6F

New York City

-9.1F

San Francisco

-9F

Newark, NJ

Chicago

-8.7F

-8.5F

Philadelphia

-8.5F

Washington DC

-8.5F

West Palm Beach, FL

-8.4F

Boston

-8.4F

Miami

-8.4F

Baltimore

82F

84F

86F

88F

90F

-9.6F

New York City

-9.1F

San Francisco

-9F

Newark, NJ

Chicago

-8.7F

-8.5F

Philadelphia

-8.5F

Washington DC

-8.5F

West Palm Beach, FL

-8.4F

Boston

-8.4F

Miami

-8.4F

Baltimore

The Guardian. Source: Climate Central