What are the sunniest (and the darkest) places in the U.S.? For an answer, check out this map, which graphs the average sunlight each place has received daily since 1990.

The map is the work of Reddit user metricmapsore, who made the map using data from the CDC's North America Land Data Assimilation System (NLDAS) Daily Sunlight data, which has been tracing average daily sunlight in kilojoules per square meter since 1979 for every US county.


As summer gets underway, it's fascinating to see what places are getting a heavier share of sunlight, and just where the dividing lines are. Is your home on the map? Tell us where you are and what the state is of the skies — whether sunny or overcast — above you.

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