How much does the average temperature on earth vary between perihelion and aphelion?
No. Even though the Earth is about 3 million miles closer to the Sun at Perihelion, it has little effect on temperatures. The Earths overall average temperatures is actually a little warmer during the northern hemisphere summer since the bulk of the Earth’s landmasses are in the northern hemisphere, and land typically heats more than water, which dominates the southern hemisphere.
