Jim Lattis, who directs Space Place at the UW-Madison Astronomy Department, said that even if there are clouds Monday, daylight will diminish. “You would still notice the effect because even if it’s cloudy, the amount of daylight that’s reaching your location will decrease dramatically. Again, something in the neighborhood of 80 percent of the Sun’s light will be blocked. So, it’ll get darker. If it’s overcast, it’ll get even darker,” Lattis said.
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