"The clouds are in the air."

Translation: बादल हवा में हैं ।

[oakleydr]

Darren says "हवा में बादल हैं।" is also correct.

[vinay92]

Technically, 'हवा में बादल हैं।' is 'There are clouds in the air' though of course, they mean the same.

[peekpoke]

somehow we expected "हवा में बादल हैं।" as a commonly used translation.

[HeikePagel]

I would have thought that it must be हवे में since before a postposition the आ-ending must be changed into -ए, no?

[vinay92]

Only masculine nouns with an ा ending need to be changed to an ेे ending in the oblique case. Feminine nouns with an ा ending remain the same in the oblique case.

हवा is feminine. It's forms are:
Singular direct-हवा
Singular oblique-हवा
Plural direct- हवाएँ
Plural oblique- हवाओं

[HeikePagel]

True, thank you:) Next time, I'll consult my शब्दकोश before posting:D