Tap 'menu' (three horizontal lines) at the top left of the screen to see a visual display of all of your locations. Click on any location on the list to switch to the new location.
You may also add/remove a location from the list of locations.
Launch the app and select the menu, then the pencil icon in the top right to access the edit locations page.
If you need to add a location, press the '+' icon in the top right of the page. Enter a city, ZIP, or postal code to search for a location and then select the location from the results list. Note that you can add a maximum of 12 locations in the app.
You can switch on the follow my location feature for the app to automatically detect your location and show you the weather information for whichever location you travel to.
You can remove a location from the edit locations page. Long-press the location you want to remove and select the trash can icon that appears in the top right. You can also tap the location to view the location details, and then tap the trash can on the top right of the page.