Um, what’s the simplest answer to this question?
That the average global temperature , like the output of the Sun, is pretty much a constant.
The changes in our 'weather' or 'climate' are due to weather patterns (climate) moving to somewhere else. The 'weather' is not anchored to the ground.
The Desert in Egypt was not always a desert. Underwater Volcanoes affect ocean currents and temperatures. On land volcanoes affect local temperatures. The Jet stream movement causes shifts in weather patterns. The most whimsiest of things, clouds, are the most powerful factor in local temperature change.
The one thing that doesn't change the weather is CO2.