rainy season; wet season
A recurring season or period with much rainfall, especially in climates contrasted with 乾季. For Japan's early-summer rainy spell, 梅雨 is the more specific everyday term.
See also: 乾期
In Southeast Asia, heavy rain falls during the rainy season.
雨季に入ると川の水位が上がる。
When the rainy season begins, the river level rises.
This region enters the rainy season around June.
Once the rainy season ends, the temperature suddenly rises.
This year the rainy season has been going on for a long time.