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  • 7 hours ago
It sounds backward, but noon is not usually the hottest time of day. Learn how thermal lag affects temperatures in your location, why afternoons heat up and why the coolest weather often arrives near sunrise.
Transcript
00:00Noon isn't the warmest part of the day, and midnight isn't the coolest.
00:04It sounds backwards, but the atmosphere actually lags behind the sun.
00:07Overnight, the ground keeps losing heat, so temperatures usually hit their lowest around sunrise.
00:12Then in the afternoon, even though the sun peaks at noon, the Earth is still gaining more heat than it's
00:16losing,
00:17so temperatures keep rising and usually peak around 3 to 5 p.m.
00:21Meteorologists call this thermal lag.
00:23It just takes time for the Earth to heat up, like a frying pan.
00:25You turn the burner on high, but it doesn't get hot instantly. It peaks later.
00:29And things like clouds, humidity, and cold fronts can shift all of this, too.
00:33So next time it still feels chilly after sunrise or brutally hot long after noon, now you know why.
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