how is the weather?问句是个病句，需要订正一下。
weather前需要加冠词the.用what 来询问天气情况，常用What's the weather like+表时间、地点或季节的词语和介词短语。如：What's the weather like today?(今天的天气怎么样？)What's the weather like in Beijing?(北京的天气怎么样？)What's the weather like in Harbin in winter?（哈尔滨冬天的天气怎么样？）同义词是How is the weather?需要注意的是用what提问时，其后有介词like；用how提问时，其后没有介词like。如：How is the weather today?=What's the weather like today?（今天的天气怎么样？）How is the weather in Hubei in winter?湖北冬天的天气怎么样？
