Yes, humans have some effect on it, but Nature takes its course regardless of what puny humans do.
The planet has gone through at least two ice ages and three warmings before humans had any hand in the weather. There are mountains today which were once at the bottom of an ocean.
Seasons are caused by the angle of the earth's axis in relation to the sun. As time goes by, the earth's orbit slides toward the sun, and the axis angle becomes less oblique. Both of those will warm the planet a wee bit.
Be good citizens and conserve energy, use clean power sources, plant lots of trees and fewer condos. But do it because it is the right thing to do. Because it's not going to make much difference to the climate. Nature will have its way, and people being born now would do well if their parents invested in property where it's well above sea level, inland, and preferably not flat because tornadoes.