How to Add a New City to the iPhone Weather AppSeptember 7, 2018 By StevenStep 1: Open the Weather app. Step 2: Tap the menu icon at the bottom-right corner of the screen. Step 3: Tap the + button. Step 4: Enter a city name or zip code, then choose the desired search result.Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Related