What's the weather forecast for tomorrow?
明天天气怎么样？

1 weather 天气
What's the weather like today?
今天天气如何？
bad/good weather
糟糕的/好的天气

2 forecast 预言；预测
The forecast for tonight is rain changing to snow
据预报今天夜里雨转雪。


A:Julia,what's the weather forecast for tomorrow?
茱莉娅，明天天气怎么样？
B:It says a storm may come tomorrow.
天气预报说明天会有一场暴风雨。
A:I hate rainy days.
我讨厌下雨天。
B:Me,too.I'm always in low spirits when it rains.Are you going out tomorrow?
我也是，一下雨我的心情就不好。你明天要出去？
A:Yes,I have to drive to Washington D.C. But you know sometimes the weather forecast is not correct. Maybe tomorrow is a clear day.Who knows?
是啊。我明天要开车去一趟华盛顿。不过有时候天气预报是不准的。没准明天是个艳阳天呢，谁知道？
B:Maybe you are right.
也许你说的对。