noun
lack of rainfall; drought
Technical term used in meteorology and related fields to describe a period with no precipitation. Often used in weather reports and climate studies.
今月は無降水の日が続いている。
This month, days without rainfall have been continuing.
無降水が長引くと農作物に影響が出る。
If the lack of rainfall persists, it will affect crops.
Compound of 無 (mu, 'without') and 降水 (kōsui, 'rainfall'). The reading むこうすい follows standard on'yomi. The term is a modern technical coinage.