Translation:The rain has cleared.
"The rain subsides." should be accepted. The present perfect tense for English implies Ua before mao.
Shouldn't "it's stopped raining" the same thing?
"It has stopped raining" was accepted.
New Hawaiian Dictionary
1 vsCleared, as rain; alleviated, assuaged, as grief; to clear up, as rain; to pass, as sadness. Ua mao aʻela ke kaumaha, the sadness has ceased. [PPN mao]