Tweteka ~ Apple's Weather wallpaper is 'live' in that your Home & Lock Screen will display a background image of the current weather in your location – so a dynamically changing sunny, cloudy, or rainy, etc. image. The screenshots below of my Home Screen show only a small sample of the possibilities – at sunrise, mid-morning and night:
Open Settings > Tap Wallpaper > Tap “+Add New Wallpaper” > Tap blue Weather icon at top right > Tap "Add" at top right > Tap "Set as a Wallpaper Pair" > Swipe up from the bottom to finish.
Change the wallpaper on your iPhone - Apple Support
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