Six60 wrote the song in Los Angeles in collaboration with Nico & Vinz, due to their shared love of reggae.

[1] The song has a minimal production, incorporating vocal harmonies with a reggae sound and a gospel choir.

[3][4] Lyrically, "Raining" expresses the feeling of falling in love.

[2][5] Later that month, the band collaborated with All Black Sevu Reece to perform a live version of the song for a promotional video for the All Blacks, during the 2019 Rugby World Cup held in Japan.

[6] In 2021, the band Coterie performed a cover of the song, which led to Six60 reaching out to them to collaborate.