harmattan

harmattan A dry and dusty wind, blowing from the Sahara, prevailing on the Atlantic coast of West Africa in December, January and February.
(quote-book)|author=(w)|page=1|year=1959|passage=That was many years ago, twenty years or more, and during this time Okonkwo's fame had grown like a bush-fire in the harmattan.
A season which spans the period in which the Harmattan wind blows.
English harmattan