Rainfall usually refers to the falling of rain. Look up rainfall in Wiktionary, the free dictionary. Rainfall may also refer to: Rain Fall, a 2009 Japanese/Australian action thriller film "Rainfall" (song), a 2019 song by British rapper Stormzy See also Operation Rainfall, a video game fan campaign founded for Japan-exclusive titles Occupation: Rainfall, a 2020 Australian science fiction action film This disambiguation page lists articles associated with the title Rainfall.If an internal link led you here, you may wish to change the link to point directly to the intended article. Wikiwand - on Seamless Wikipedia browsing. On steroids.