Do either of you know what entity is being used for weather? I use openweathermap for my weather entities, but none of them provide a nice image of the weather like in the picture above
Maybe a template sensor over the openweathermap_forecast_condition state? You can pretty easily have a template change its icon, and mdi: has all the icons built in.
Here’s a template I use for current condition in a card, but it should work similarly for the forecast. Or works just need to be applied to the icon of a template sensor.