Garden Spider Slowly Building Web

A short clip, with a fun description. There were two of these black and yellow garden spiders (Argiope aurantia) spinning their webs at 5 p.m. on September 19th. only one of them is shown in this video. All of the other garden spiders in the area I'm doing this, except the two that are close to each other. I'm wondering if this could be a genetics thing.
It was 45 degrees Fahrenheit last night, and the colder it gets, the slower these are (see later videos). I'm thinking they are taking advantage of the warm part of the day now to rebuild their webs to endure the night, but I'm wondering also why these are the only two spiders in the entire hill of South Berwick, Maine to do this.
As always, thank you for watching!

[@aktualizator1219]

The spider species Araneus diadematus is commonly called the European garden spider, diadem spider, orangie, cross spider, and crowned orb weaver. It is sometimes called the pumpkin spider.

[@zzydny]

Goodness, that's chilly (overnight low is currently the upper 70's here in South Mississippi). At 45F, the spiders probably won't be around for very much longer. Perhaps the ones who aren't spinning are "on the way out" earlier than the others? There are golden garden spiders at every outside door and over most of the windows to my house; and by the main door, there is one on either side as though they were sentinels set to check all who enter and exit. There have been so very many Argiopes this year!

[@IloveSPIDERZ]

I've found an immense amount of Argiopes this year also! I doubt I got better at finding them (though possible, I suppose) because I've been actively looking for these for at least 20 years... I'm wondering if it has something to do with the bird decline, and the rainy spring we had. 45 is cold! During the day was mid 60s, but tomorrow is supposed to get warm here again.