"World weather" in Engpsh can be referred to as "global weather" or "international weather." The phrase "world weather" is a general term that refers to the current conditions and forecast for various regions around the world. The term comes from the idea of weather patterns and conditions affecting the entire planet.

Examples:

"The world weather forecast for tomorrow is mostly sunny with a chance of scattered thunderstorms."
(明天全球天气预报大部分是晴天，有零星雷雨的可能。)
"Experts are monitoring the world weather patterns closely to predict the severity of the upcoming hurricane season."
(专家正在密切关注全球天气模式，以预测即将到来的飓风季节的严重程度。)