no button to add a city in weather app

Try removing 4-5 cities from your current list.

Power off the phone and restart

Try to add the new city that you want

Keep adding back the other cities

If still no luck, try removing the Weather App, then install it again from the App Store. You will have to re-add locations when you do this.

More info:

How To Add Locations To The iPhone Weather App - Screen ...https://screenrant.com › Tech

After you search for a city and tap on it in the list of search results, there should then be an "Add" at the top right of the screen when the single city displays (the screen that shows the City name, temperature, and weather for that city). There is also a "Cancel" at the top left of that screen. Just checking to see if you are getting to that screen.

I don't know if there is a maximum, but is there any chance you're at a potential max (i.e., do you have a lot of cities already listed)?

Search for the city that you want

Look for the Add button in the upper right corner of the screen

Tap Add