This one doesn't need an introduction, so here's some quick info:

"Its story is told from the perspective of a man in Africa awaiting his female partner's inbound flight. The protagonist looks forward to their time together during the rainy season as it grants a reprieve from his normal responsibilities. The song's catchy chorus incorporates metaphor for his determination to guard his time with her."
- Wikipedia http://en.wikipedia.org/wiki/Africa_%28song%29