IPA: /ˈwɛðərˌkæstər/
KK: /ˈwɛðərˌkæstər/
A person who presents weather forecasts on television or radio.
The weathercaster provided an accurate forecast for the upcoming week.
Weathercaster → It is formed from "weather" (from Old English *weder*, meaning atmospheric conditions) and "caster" (from Old English *castan*, meaning to throw or to broadcast). The word "weathercaster" refers to a person who broadcasts or presents weather information.
Think of someone who 'throws' or 'broadcasts' information about the 'atmospheric conditions' — that's what a weathercaster does.