Officials say the number is expected to rise.
So far, 15 people been have been hospitalised, including 12 children, some of whom suffered severe burns, according to the Health Ministry.
Dramatic footage shows a woman emerging from the ashes of Guatemala's Volcán de Fuego saying that while she managed to escape, her entire family and neighbors were likely wiped out by a rogue lava flow.
Fanuel Garcia, director of the National Institute of Forensic Sciences, said 62 bodies had been recovered and 13 of those had been identified.
Hilda Lopez said the volcanic mud flowed into her village of San Miguel Los Lotes, close to the mountain.
A volcano southwest of Guatemala's capital has erupted for the second time this year, setting off loud explosions and spewing ash almost four miles into the sky.
Dense ash blasted out by the volcano - which rises to 3,763 meters (12,346 feet) - also shut down Guatemala City's global airport, civil aviation said. There were explosions and ash plumes on 19-21 May as well as a volcanic mudflow on May 17.
Authorities urged residents living near the volcano to evacuate immediately, and warned some in Chimaltenango, Sacatepequez and Escuintla states to watch out for volcanic rocks and ash.
People have been evacuated from several areas and the capital's La Aurora airport has closed.
In the Guatemalan village of El Rodeo, heavily armed soldiers wearing blue masks to ward off the dust are standing guard over a community hit by a volcanic eruption that has killed at least 25.
Some residents said they never learned of the danger until it was upon them - and were critical of authorities.
"Conred [the country's disaster agency] never told us to leave".
He said: "Lava flows are not the main hazard at this volcano".
Rescue workers were hampered when roads were cut by the lava flows.
The country's disaster agency said Monday that the death toll remains at 25, though there are apparently people still unaccounted for.
Israel's ties with Guatemala were significantly upgraded last month when the central American country became the second country to move its embassy to Jerusalem, two days after the U.S. inaugurated its own embassy in the city, answering a longstanding Israeli demand for recognition of the city as their capital.