One of the possible values of the forecast property conditionCode is sleet. But according to wikipedia this term refers to multiple, quite different weather phenomena. Some harmless and other potentially hazardous.
What type of weather does sleet refer to in the weatherKit API?
Hold on, don’t run outside to play in the sleet just yet. The documentation for Precipitation.sleet
(link) says:
A form of precipitation consisting of ice pellets.
That’s American sleet, and remember that Apple APIs and documentation generally are written in American English.