Lal Sarath Kumara, a top disaster management official, said 980,095 people from over 270,000 families are affected in 17 districts in the country.
"There were 17 deaths with 15 more disappearances. Twelve more are wounded", Kumara said.
Of the 17 deaths, nine died due to landslides at worst-hit Rilpola in the central Badulla district.
Kumara said more than 4,200 homes have been completely damaged while another 13,000 have been partially hit.
At least 38 people were killed in October when mudslides buried homes of tea plantation workers in the country's central hills.