weather可数吗？

　　例句：

　　The weather was warm for the time of year.

　　在一年的这个时节这天气算是暖和的了。

　　The weather is very changeable at this time of year.

　　年年在这个时候天气都变化无常。

　　There's going to be a change in the weather.

　　天气将有变化。