晴天

晴 qíng HSK 2 #14,657

clear (sky) / sunny

晴天霹雳 qíngtiān-pīlì #34,237

a bolt from the blue / a sudden shocking event / a thunderclap from a clear sky

天上 tiānshàng HSK 2 #4,384

in the sky / the heavens

秋天 qiūtiān HSK 2 #6,453

autumn; fall

冬天 dōngtiān HSK 2 #4,454

winter

春天 chūntiān HSK 2 #4,361

spring (season)

夏天 xiàtiān HSK 2 #2,297

summer

整天 zhěngtiān HSK 3 #2,226

all day long; the whole day / all the time (figurative, implying annoyance)

天 tiān HSK 1 #88

day / sky / heaven

当天 dāngtiān HSK 6 #5,534

on that day; the same day; that very day