Unlike Windows or Mac that is no official application or software for taking weather screenshot on iPhone, this is because this feature is built right into it.
The interface on the iPad or iPhone is more like Android than windows.
So with that built in feature capturing weather screenshot using any iOS device is very much easy. Apart from getting the weather images you also capture pretty much any thing on your iPad or iPhone using this method.
– Power up your iPad or iPhone, then go to the place you usually access your weather reports. It could be an app or a website.
– While there press and hold the Home button that is located at the bottom center of the device, that is the button you often use to exit the app and return to the home screen
– While the home button is down, press the Sleep (or Wake) button located on the opposite edge of the phone. The screen will flash momentarily, you will also hear a click sound and the content of the current screen, that is the weather screen will be saved as a new image in your Photo Gallery.
Note: The same key combination will reset your iPhone if you press and hold the Sleep/Wake button and the Home button at the same time for at least 10 seconds.