Sky Type Calculator

Background

This calculator determines sky conditions—clear, partly cloudy, or cloudy—on an hourly, daily, monthly, or yearly basis, assisting designers and researchers in understanding specific sky conditions using EPW files.

Table 1: Locations, latitude, and annual sky types (%).

Sky Types Across American Cities: Quito, Phoenix, and Anchorage 

Sky types of Quito (top), Phoenix (center), and Anchorage (bottom); monthly percentages (left column) and monthly hours (right column).

Table 2: Annual sky types in various Middle Eastern countries （Days）.