Heat in the city

City centers often feel far warmer in certain areas, due to factors including paved surfaces absorbing sunshine, buildings blocking airflow, and fewer trees. But how much can it vary? Using hyper-local temperature readings, we mapped the heat patterns across 20 American cities.

Max.
Min.
Temperature
Sort by (high to low)

Los Angeles

CaliforniaCA

Los Angeles temperature map
Temp. Range: 37°F
Avg. Temp.: 90°F

Phoenix

ArizonaAZ

Phoenix temperature map
Temp. Range: 30°F
Avg. Temp.: 111°F

Houston

TexasTX

Houston temperature map
Temp. Range: 29°F
Avg. Temp.: 88°F

San Diego

CaliforniaCA

San Diego temperature map
Temp. Range: 25°F
Avg. Temp.: 81°F

Dallas

TexasTX

Dallas temperature map
Temp. Range: 23°F
Avg. Temp.: 92°F

Minneapolis

MinnesotaMN

Minneapolis temperature map
Temp. Range: 23°F
Avg. Temp.: 82°F

New York

New YorkNY

New York temperature map
Temp. Range: 23°F
Avg. Temp.: 87°F

Boston

MassachusettsMA

Boston temperature map
Temp. Range: 19°F
Avg. Temp.: 87°F

Chicago

IllinoisIL

Chicago temperature map
Temp. Range: 19°F
Avg. Temp.: 79°F

Denver

ColoradoCO

Denver temperature map
Temp. Range: 19°F
Avg. Temp.: 97°F

San Francisco

CaliforniaCA

San Francisco temperature map
Temp. Range: 19°F
Avg. Temp.: 69°F

Philadelphia

PennsylvaniaPA

Philadelphia temperature map
Temp. Range: 18°F
Avg. Temp.: 89°F

Atlanta

GeorgiaGA

Atlanta temperature map
Temp. Range: 15°F
Avg. Temp.: 82°F

Baltimore

MarylandMD

Baltimore temperature map
Temp. Range: 15°F
Avg. Temp.: 89°F

Detroit

MichiganMI

Detroit temperature map
Temp. Range: 15°F
Avg. Temp.: 77°F

Miami

FloridaFL

Miami temperature map
Temp. Range: 15°F
Avg. Temp.: 92°F

St. Louis

MissouriMO

St. Louis temperature map
Temp. Range: 14°F
Avg. Temp.: 97°F

Tampa

FloridaFL

Tampa temperature map
Temp. Range: 14°F
Avg. Temp.: 92°F

Washington, D.C.

Washington, D.C. temperature map
Temp. Range: 14°F
Avg. Temp.: 90°F

Seattle

WashingtonWA

Seattle temperature map
Temp. Range: 8°F
Avg. Temp.: 67°F
The 20 cities shown are the most populous metropolitan areas in the US, according to the Census Bureau Population Estimates of 2016. Temperature maps were created using an Inverse Distance Weighting algorithm from temperatures recorded with Geotab GO devices at over 55,000 points across these cities at 12 PM on June 21st, 2017, the longest day of the year and first day of summer. Street-level temperature will be a few degrees warmer than the local ambient air temperature. City outlines were sourced from individual states’ open data sites, road outlines © OpenStreetMap.

Los Angeles

CaliforniaCA

108°F

71°F

90°F

Los Angeles temperature map Los Angeles road map Los Angeles labels

Phoenix

ArizonaAZ

115°F

85°F

111°F

Phoenix temperature map Phoenix road map Phoenix labels

Houston

TexasTX

95°F

66°F

88°F

Houston temperature map Houston road map Houston labels

San Diego

CaliforniaCA

95°F

70°F

81°F

San Diego temperature map San Diego road map San Diego labels

Dallas

TexasTX

99°F

76°F

92°F

Dallas temperature map Dallas road map Dallas labels

Minneapolis

MinnesotaMN

98°F

75°F

82°F

Minneapolis temperature map Minneapolis road map Minneapolis labels

New York

New YorkNY

99°F

76°F

87°F

New York temperature map New York road map New York labels

Boston

MassachusettsMA

99°F

80°F

87°F

Boston temperature map Boston road map Boston labels

Chicago

IllinoisIL

89°F

70°F

79°F

Chicago temperature map Chicago road map Chicago labels

Denver

ColoradoCO

105°F

86°F

97°F

Denver temperature map Denver road map Denver labels

San Francisco

CaliforniaCA

79°F

60°F

69°F

San Francisco temperature map San Francisco road map San Francisco labels

Philadelphia

PennsylvaniaPA

99°F

81°F

89°F

Philadelphia temperature map Philadelphia road map Philadelphia labels

Atlanta

GeorgiaGA

90°F

75°F

82°F

Atlanta temperature map Atlanta road map Atlanta labels

Baltimore

MarylandMD

95°F

80°F

89°F

Baltimore temperature map Baltimore road map Baltimore labels

Detroit

MichiganMI

85°F

70°F

77°F

Detroit temperature map Detroit road map Detroit labels

Miami

FloridaFL

100°F

85°F

92°F

Miami temperature map Miami road map Miami labels

St. Louis

MissouriMO

104°F

90°F

97°F

St. Louis temperature map St. Louis road map St. Louis labels

Tampa

FloridaFL

99°F

85°F

92°F

Tampa temperature map Tampa road map Tampa labels

Washington, D.C.

99°F

85°F

90°F

Washington, D.C. temperature map Washington, D.C. road map Washington, D.C. labels

Seattle

WashingtonWA

70°F

62°F

67°F

Seattle temperature map Seattle road map Seattle labels
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