eli5: why isn’t the summer Solstice the hottest day of the year?

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It is the longest day, so it gets the most sunshine, why is it hotter latter in the summer when the days are getting shorter again???

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Anonymous 0 Comments

Because thermal mass. Land and sea keeps warming up all through summer and only starts cooling again in the autumn.

Anonymous 0 Comments

Very simply, it occurs early in the summer seasonal cycle. The ground and other objects in the environment have not yet heated as thoroughly and deeply as they will after several more weeks of summer.

Each season changes the ground temperature. A lot of our experience of heat comes from ground heat, as well as the air. Heat rises. A cooler ground absorbs heat rather than reflecting it back.

This goes for the other seasons as well – winter feels colder once the ground is thoroughly and deeply cold, and that can take weeks to peak.