English expression: Write a weather forecast for major cities in China. Hainan is sunny in the morning, dark clouds in the afternoon, Beijing is windy, and Changchun is snowing at night.

Now here is the weather forecast for big cities in China. In Hainan it's clear in the morning and overcast in the afternoon. There will be a heavy wind in Beijing. In the evening it's snowy in Changchun. It's humid/wet in Changsha and there will be rain in Guangzhou. That's all and thanks for listening.

Weather forecast is an applied style, so it is not necessary to use the future tense.