harmattan

/ˌhɑrməˈtæn/
noun
  1. A dry, dusty wind that blows from the Sahara Desert across West Africa, usually from November to March.
    • During the harmattan, the sky often turns hazy from all the dust.
    • Farmers in the region prepare for the harmattan by storing water for their animals.
    • The harmattan brings cooler temperatures but also makes it hard to see far distances.