Yabla video uses of 变天

嗯? en?
知道 zhīdào
今天 jīntiān
huì
变天 biàntiān
What? -I didn't know that the weather would suddenly change.
估计 gūjì
a
zhè
两天 liǎngtiān
yào
变天 biàntiān
r
I'm suspecting the weather is going to change these days