The storm is weakening but alerts are still in place for people in the eastern Lau group of islands.
Mona is cutting an arch around the most populous islands of Viti and Vanua Levu and the smaller islands which dot the eastern part of the country.
It's now a category one storm, the lowest on the scale, but has still caused floods and disrupted transport.
About 2000 people took shelter in 40 evacuation centres over the weekend and thirty roads were closed, mostly due to floods and some landslips.
People in the Lau group have been warned to expect gale-force and heavy rain as Mona tracks south, before arching south west over Fiji over the next 24 hours.
Photo Facebook/Manik Lal. Caption: Flooding in Savusavu