Shirin muhallinka rayuwarka na wannan makon ya tattauna ne  kan yadda sauyin yanayi ko dai na zafi ko na sanyi ko kuma damina ke bayyana ƙarara, musamman a yankin yammacin Afirka. Ga misali a Najeriya, ɗaya daga cikin sauye-sauyen yanayin da aka shaida shi ne rashin hunturu a shekarar  bana, musamman a Yankin arewacin ƙasar, inda aka saba ganin kankamar Yanayin na sanyin mai tsanani daga ƙarshen watan Nuwamba ko farkon Disamba zuwa ƙarshen watan Janairu ko farkon Fabarairu.