> Texas' weather is colder now than in the past 40 years.

Yes. Thus "Extreme" weather.

I was going to suggest it is likely due to climate change, but that is largely conjecture.

There likely is a climate change effect. Polar vortexes have been making deeper incursions into North America because of increased turbulence in the atmosphere, driven by the overall energy level.

This about a pot, slowly boiling. As it gets hotter, it swirls more.

Yeah, we've had a couple of major ice storms/ extreme snow here in the past 3 years too. It's a little disturbing when you realize they are hitting us at the expense of the North Pole.