Quote:
Originally Posted by F1 Tommy
That map is very strange. According to that we get the same amount of sun as NYC. The US weather service says that is not accurate, showing a chart can be made to prove either side of any argument. Not really sure how they measure sunlight in both cities but I have seen perfectly clear days at ORD in Chicago called partly cloudy.
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Check the maps again and notice that the colors are not based upon the same span of hours.
Black >3500 hours
Burgundy 3000 - 3500 hours (range of 500 hours)
Red (Dark Orange) 2500 - 3000 hours (range of 500 hours)
Orange (Light Orange) 2000 -2500 hours (range of 500 hours)
Yellow 1800 - 2000 hours (range of 200 hours)
Green 1600 - 1800 hours (range of 200 hours)
Light Blue 1200-1600 hours (range of 400 hours)
Dark Blue <1200 hours
Chicago and New York City might have up to 500 hours of sunlight difference masked under the same color, which could be within the range of three different colors in a less sunny location.
Why use different ranges? Because they can and also wish to confuse everybody.