Since Texas summers have virtually no time limit, the heat often stays around until mid-October or even early November. And when the winter does arrive, it only lasts until February or so. That's just the natural cycle around these parts.
That's pretty much how it was for me, when I lived in Dallas. The bitter temperatures would be there all through Christmas and New Year's, but if we got any snow at all it wasn't until Valentine's Day...and even then it didn't last for long.In Houston, "winter" is usually two weeks in February.