https://www.nasa.gov/audience/forstu...-earth-58.html
"How Does Earth Move?
Earth orbits the sun once every 365 days, or one year. The shape of its
orbit is not quite a perfect circle. It's more like an oval, which
causes Earth's distance from the sun to vary during the year. Earth is
nearest the sun, or at "perihelion," in January when it's about 91
million miles away. Earth is farthest from the sun, or at "aphelion," in
July when it's about 95 million miles away."

So, note that the sun is farther from the earth in July, so how come
it's not colder then. Well, in the north, the sun hits the earth more
directly, so the earth gets more rays per acre. So the two factors
compensate for each other.

But doesn't that mean that in the southern hemisphere, when it's the
suns rays are hitting the earth obliquely and it's colder because of
that, it's also farther from the sun, so it's colder because of that
too. So the two factors reinforce each other. That is, doesn't that
mean the difference between summer and winter temperatures are greater
in the southern hemisphere than the northern?


"Why Does Earth Have Seasons?
Earth has seasons because its axis is tilted. Thus, the sun's rays hit
different parts of the planet more directly depending on the time of
year.

From June to August, the sun's rays hit the Northern Hemisphere more
directly than the Southern Hemisphere. The result is warm (summer)
weather in the Northern Hemisphere and cold (winter) weather in the
Southern Hemisphere."