This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.7 months, from March 9 to May 31, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest month of the year in San Felipe del Progreso is April, with an average of 7.3 kWh.
The darker period of the year lasts for 2.8 months, from November 1 to January 25, with an average daily incident shortwave energy per square meter below 5.4 kWh. The darkest month of the year in San Felipe del Progreso is December, with an average of 5.0 kWh.
For the purposes of this report, the geographical coordinates of San Felipe del Progreso are 19.714 deg latitude, -99.952 deg longitude, and 2,579 m elevation.
The topography within 3 kilometers of San Felipe del Progreso contains significant variations in elevation, with a maximum elevation change of 232 meters and an average elevation above sea level of 2,605 meters. Within 16 kilometers contains significant variations in elevation (701 meters). Within 80 kilometers contains large variations in elevation (3,961 meters).
The area within 3 kilometers of San Felipe del Progreso is covered by cropland (88%) and grassland (12%), within 16 kilometers by cropland (74%) and shrubs (15%), and within 80 kilometers by cropland (36%) and trees (29%).
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