天气预报用英语怎么说

天气预报用英语可以说成 weather forecast。它的来源是由两个单词组合而成：天气（weather）和预报（forecast）。

例句：

The weather forecast for tomorrow is cloudy with a chance of rain.

I always check the weather forecast before I decide what to wear.

The weather forecast said that it would be sunny today, but it's actually raining.