Maeneo ya Kanda ya Ziwa na kaskazini zilianza mapema kidogo.
Muda ni kwa sababu upepo unaoleta mawingu ya mvua unaweza kubadili speed na uelekeo. Mabadiliko ya temperature na humidity, n.k.
Na ndiyo maana wanaita utabiri (forecast).
Ukielewa maana ya utabiri utajua inaweza usiwe 100%.
"A seven-day forecast can accurately predict the weather about 80 percent of the time and a five-day forecast can accurately predict the weather approximately 90 percent of the time. However, a 10-day—or longer—forecast is only right about half the time."