I don't see how it's any less communicative than what was printed on the front page of a newspaper a decade or two ago. There'd usually be a high temperature, low temperature, and icon showing how sunny it would be, possibly with a percentage chance of clouds or precipitation. You could look up more elsewhere in the newspaper, but that was much more work than it takes on a phone.

Understanding what the forecast means has been a problem as long as they've been around. For example does a 10% chance of rain mean that there's a 10% chance it will rain at all that day, or a 10% chance it will be raining at any given time? What about when it's an hourly forecast or a map showing 10% for part of the day or part of the region?