June temperatures each year from 1850-2024 compared to the 20th-century average. It's been several decades since we've had a June that was colder than average (blue bars, below the zero line). June 2024 (final red bar) was the warmest June on record. Junes are getting warmer at a rate of 0.94 ˚F (0.52 ˚C) per century.