House Warming: What's the Deal with Heating and Cooling the Home?
In the space between discovering fire (the start of humankind) and creating air conditioning (the late 1800s to 1950s), houses were invented. Today, we bring the heat and cold inside with us, and it's much better than being outside all the time.
We've created a suitable temperature range for the indoors, regardless of the season. However, that's trickier as Texas has more than four seasons.
Oh Hail No: Wacky Texas Weather Requires More than Air Conditioning
If you don't like the weather, just wait five minutes? The mortar-strike, baseball, ice hail we saw this year in Texas drove the point home. The climate here is about as ordered and predictable as the contents of a blender thanks to the gulf, the desert, and Wizard-of-Oz-style winds gifted from the Great Planes.
2021 also saw the tie for the second-coldest day on record for DFW (-2 degrees F, Jan 31). This is just ten years after the tie for the seventh-hottest day on record (110 degrees F, Aug 2, 2011). This is going back well over 100 years. (source: https://www.weather.gov/fwd/dgr8mxmn)
But, as with most of this hemisphere, Dallas Fort Worth generally gets colder in the winter months and hotter in the summer.