a shower of rain, a rainfall
（治）こりゃ一雨来るな
Looks like we're in for some rain.
— 万引き家族 (2018)
今にも一雨降りそうだ。
It looks like it's about to rain.
一雨きそうですね。
Looks like we’re in for some rain.
今にも一雨きそうだ。
It looks like it’s about to rain.