降雨|こううkouu[1]atamadaka (head-high)

1. nounrainfall; rain
   先週せんしゅうの激はげしい降雨こううのために出水しゅっすいした。↗

   We had flooding because of last week's heavy rains.

• Synonym雨あめNeutralThe everyday word for rain and the most common choice; 「降雨」 is a meteorological, statistical term centring on the phenomenon and the amount of rain that falls.
• Synonym雨降りあめふりCasualColloquial word for rain or a rainy day with an everyday, lived-in feel, as in 「雨降りの日」.
• Related雨天うてんWrittenWritten/formal prose for a rainy day, focusing on the weather condition; common in set phrases like 「雨天決行」 and 「雨天中止」.
• Antonym晴天せいてんWrittenWritten/formal prose for fine, clear weather; the opposite of 「降雨」.
• Antonym日照りひでりCasualColloquial term for a long dry spell with no rain, opposite of 「降雨」; e.g. 「日照りが続く」.

Use 「降雨」 for rain in meteorological or statistical contexts, as in 「降雨量」 and 「降雨確率」. In everyday speech just say 「雨」; for a rainy day use 「雨天」. The opposites are 「晴天」 and 「日照り」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 雨あめが降ふること。