What causes summer here in the northern hemisphere?

Summer and seasons in general are caused by the tilting of the Earth’s axis which go farther or closer to the sun. In summer, the North Pole is titled closer to the sun which allows the warmer weather in the northern hemisphere

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Answeris associated with sunny,dry weather;