I have to get up and walk to the window, so looking it up in the terminal is much faster. But I agree that it feels somewhat detached from nature. Also the thermometer at the window varies a lot with direct sunlight or wind, so i find these weather services give a better estimate to what i should be wearing when i go outside.
I’m reminded of the old discussion of which clock program for X11 consumed the least resources and screen size. It concluded with something like: “Of course, the clock which consumes no resources, and does not take any screen space, is the clock which hangs on your wall.”.
Stuffing a three days weather report into $PS1 might be to much information for a prompt.