Usage note
天气是用来描述每天外面的气温、晴雨情况等。
tiān qì shì yòng lái miáo huàng měi tiān wài biān de ān qì、qíng yǔ kuāng chéng děng。
天气 is used to describe the temperature, weather conditions outside every day.
Context note
我们经常用天气来决定穿什么衣服或者计划户外活动。
wǒ men zhēn jīng yòng tiān qì lái jué dì chuān shén me yī fu huò zhě jì huà wài kù huó dòng。
We often use weather to decide what clothes to wear or plan outdoor activities.
5 examples
今天天气很好。
jīn tiān tiān qì hěn hǎo。
Today the weather is very good.
明天天气会下雨。
míng tiān tiān qì huì xià yǔ。
It will rain tomorrow.
周末天气适合去公园。
zhōu mò tiān qì shì hé qù gōng yuán。
The weekend weather is suitable for going to the park.
昨天天气很冷，我穿了厚衣服。
zuó tiān tiān qì hěn lěng， wǒ chuān le hòu yī fu。
Yesterday the weather was very cold, so I wore thick clothes.
今天天气不错，我们可以去爬山。
jīn tiān tiān qì bú cuò， wǒ men kě yǐ qù pá shān。
Today the weather is nice, we can go hiking.
5 mini stories
早上妈妈说今天天气很好，我们一起去公园玩。
zǎo shàng mā ma shuō jīn tiān tiān qì hěn hǎo， wǒ men yì qǐ qù gōng yuán wán。
In the morning, Mom said today's weather was very good, so we went to the park together.
爸爸说周末天气适合去海边游泳。
bà ba shuō zhōu mò tiān qì shì hé qù hǎi biān yóu yǒng。
Dad said that the weekend weather was suitable for going to the beach to swim.
昨天天气很冷，我们穿了棉衣。
zuó tiān tiān qì hěn lěng， wǒ men chuān le mián yī。
Yesterday it was very cold, so we wore our down jackets.
今天天气不错，我们可以去爬山。
jīn tiān tiān qì bú cuò， wǒ men kě yǐ qù pá shān。
Today the weather is nice, we can go hiking.
明天天气会下雨，我们不能去野餐了。
míng tiān tiān qì huì xià yǔ， wǒ men bù néng qù yě cān le。
It will rain tomorrow, so we cannot have a picnic.
Mini dialogue
天气怎么样？
A
今天天气怎么样？
Jīntiān tiānqì zěnme yàng?
How is the weather today?
B
天气很好，不冷也不热。
Tiānqì hěn hǎo, bù lěng yě bù rè.
The weather is very good, not cold and not hot.
明天天气
A
明天天气会下雨吗？
Míngtiān tiānqì huì xià yǔ ma?
Will it rain tomorrow?
B
天气预报说不会下雨。
Tiānqì yùbào shuō bú huì xià yǔ.
The weather forecast says it won't rain.
Related words and contrasts
related
晴天
qíngtiān
sunny day
晴天 is a type of 天气 (weather) meaning a sunny day.
related
下雨
xiàyǔ
rainy; to rain
下雨 describes rainy weather, a common type of 天气.
related
气候
qìhòu
climate
天气 is daily weather, while 气候 is the long-term climate of a place.