A man shelters from the sun with an umbrella in Saint Peter's Square at the Vatican, July 19, 2015. A heat wave coming from Africa is spreading across Italy with temperatures forecast to reach 40 degrees Celsius (104 degrees Fahrenheit), reported local weather officials. [Photo/Agencies]

WASHINGTON - Earth dialed the heat up in June, smashing warm temperature records for both the month and the first half of the year.

Off-the-charts heat is "getting to be a monthly thing," said Jessica Blunden, a climate scientist for the National Oceanic and Atmospheric Administration. June was the fourth month of 2015 that set a record, she said.

"There is almost no way that 2015 isn't going to be the warmest on record," she added.

NOAA calculated that the world's average temperature in June hit 61.48 degrees Fahrenheit (16.33 Celsius), breaking the old record set last year by 0.22 degrees (.12 degrees Celsius). Usually temperature records are broken by one or two one-hundredths of a degree, not nearly a quarter of a degree, Blunden said.

And the picture is even more dramatic when the half-year is considered.

The first six months of 2015 were one-sixth of a degree warmer than the old record, set in 2010, averaging 57.83 degrees (14.35 Celsius).