Pulsing at idle on cold start

Ive never noticed the car do this before. I thought maybe it was the colder weather but it isn’t too bad out today and noticed it again.

When cold and I first start the car it pulses at idle. From about 1k to 1200 rpm. Does it for about a minute or so and then calms down before settling at about 800 rpm. It bounces up and down pretty quick. As I said it goes away after warming up, but this is new and was wondering if there is something happening that I need to check for.

Is it the cold weather or something else going on? Thanks guys