The built-in Weather app's graph of "Next Hour Precipitation" does not display any numbers (only "light"–"heavy"), so I could not directly compare to the precipitation intensity values returned by WeatherKit. But my own app has a similar "light"–"heavy" scale which used to match up well with the Weather app but at some point over the summer the bars shot up and now they only match when I divide the inputs from WeatherKit by 2.54.
MathEasel
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