How is the weather?
In Chinese, we say 天气怎么样?Tiānqì zěnme yàng?
Is it sunny?
Is it rainy?
Is it little cloudy?
Is it snowy?
Is it windy?
Is it foggy?
是晴天吗?
Shì qíng tiān ma?
是下雨吗?
Shì xià yǔ ma?
是多云吗?
Shì duōyún ma?
是下雪吗?
Shì xià xuě ma?
是刮风吗?
Shì guā fēng ma?
是多雾吗?
Shì duō wù ma?
Or,
Is it warm?
Is it cold?
Is it cool?
Is it hot?
温暖吗?
Wēnnuǎn ma?
寒冷吗?
Hánlěng ma?
凉爽吗?
Liángshuǎng ma?
炎热吗?
Yánrè ma?
What is the weather like today?
今天天气怎么样?
Jīntiān tiānqì zěnme yàng?
Have a look outside!
看看外面吧!
Kàn kàn wàimiàn ba!