No group has claimed responsibility for Monday’s attacks, but officials say the main suspects are militants linked to al-Qaeda.
A triple bombing at a grocery market in the town of Judaida al-Shat in Diyala province left at least 13 people dead and injured 50 people.
On Monday evening, at least 29 people died and 80 were injured in a series of car bomb attacks targeting army and police checkpoints in Mosul.
Police also said two roadside bombs detonated near a cafe in the Sadr City district of northeastern Baghdad, killing four people.
Later on Monday, a car bombing at a market in the Taji neighborhood on the northern edge of Baghdad claimed the lives of seven people.
A number of people were also killed in the northern province of Kirkuk in the towns of Tuz Khurmatu and Suleiman Bek and in Madain, where a bombing caused several deaths.
There has been a heightened level of attacks since the beginning of the year.
The violence came after several days of relative calm following symbolic moves by Iraq's political leaders to mend differnces.
The bloodshed in May pushed the month's death toll to the highest such figure since 2008, raising concerns of a revival of the violence that blighted the country in 2006 and 2007.