Urban Heat Island Intensity Calculator

Urban Heat Island Intensity Calculator

Cities, with their abundant concrete, asphalt, and reduced vegetation, absorb and retain more heat than surrounding rural areas - this calculator quantifies that temperature difference, known as the urban heat island (UHI) effect.

UHI Intensity = Urban Temperature - Rural Temperature

Example

28┬░C measured in the city center, 24┬░C measured in nearby rural countryside at the same time:

UHI Intensity = 28 - 24 = 4.0┬░C (moderate urban heat island effect)

Reading the Intensity

Temperature Difference	Assessment
0┬░C or less	No urban heat island effect detected
< 2┬░C	Mild urban heat island effect
2-5┬░C	Moderate urban heat island effect
> 5┬░C	Strong urban heat island effect

The effect is typically most pronounced at night, when urban surfaces slowly release the heat absorbed during the day while rural areas cool more quickly - this is a major factor driving urban planning interest in green roofs, reflective "cool" pavement materials, and expanded urban tree canopy coverage as heat mitigation strategies.