天气预报用英语说是：weather forecast。
weather forecast，英式读音为：[ˈweðə fɔːkɑːst]；美式读音为：[ˈweðər fɔːrkæst]。其中weather的意思是天气，forecast的意思是预测，其复数形式是：weather forecasts。其英英释义是：a forecast of the weather。
常见短语搭配：
fire weather forecast：火险天气预报。
numerical weather forecast：数值天气预报。
weather forecast：天气预报。
agricultural weather forecast：农业天气预报。
aviation weather forecast：航空天气预报。
weather forecast：天气预报。
agricultural weather forecast in time：及时农业天气预报。
long range weather forecast：长期天气预报。
short range weather forecast：短期天气预报。
short term weather forecast：短期天气预报。
weather forecast双语示例
1、按天气预报，现在该下雪才是。
It should be snowing now, according to the weather forecast.
2、根据天气预报，晚一点天应该会转晴。
According to the forecast, it should brighten up later.
3、天气预报预测高温、大风和雷电天气将继续。
Weather forecasts predict more hot weather, gusty winds and lightning strikes.
4、稍后是1点45分的财经新闻和天气预报。
Still to come, the financial news and the weather at a quarter to two.
5、天气预报有的时候准，有的时候不准。
Sometimes the weather forecast is accurate, sometimes not.
6、天气预报说，我们婚礼那天可能会下雨。
The weather forecast says that rain is likely on our wedding day.
7、用CAR模型作年旱涝长期天气预报的研究。
The Research on Annual Drought and Long-term Flood Prediction by CAR Model.
8、我们要从PHP中访问的Web服务是一个天气预报应用程序。
The Web service we're going to consume from PHP is a weather forecast application.