After two days in the 60s, high temperatures 20° and 22° warmer than normal, the weather will cool, but not too much. The La Niña pattern continues to dominate the global jet stream pattern. Basically brief intrusions of cold air push into the "Lower 48" and occasional surges of moist air bring episodes of rain. What is missing are big winter storms.
The coming weekend one of those surges of moisture will come our way and bring a period of rain lasting about 24 hours.
This discussion is specific to the weekend forecast, however it illustrates in general how "return flow" around an anticyclone, coming off the Gulf of Mexico transports moisture deep into the continent for rain.
The video below explains it.