Election for the 60-member Assembly is scheduled to be held in Meghalaya early next year, but the dates were not announced yet.
The tenure of the current Assembly expires on March 6.
"The BJP headquarters have directed us to prepare for the visit of the Prime Minister on December 16," state BJP president Shibun Lyngdoh told PTI.
Modi would inaugurate a BJP office near the official residence of the chief minister and address a public meeting at the Polo Grounds later.
Earlier, Union Home Minister Rajnath Singh was scheduled to inaugurate the party office today.