NOAA released its monthly global temperature analysis for June 2017 this morning. Over land and ocean surfaces combined, it was the 3rd warmest June on record. Records go back to 1880. Some highlights:
• June was 1.48°F (0.82°C) above the 20th century average of 59.9°F (15.5°C)
• The four warmest Junes on record have all come in the last four years
• The global ocean was the 3rd warmest on record for June, even with no El Niño in place in the Pacific Ocean. Only 2015 and 2016 were warmer
• Over land surfaces only, it was the 4th warmest June on record
Year to date:
• The global average temperature over land and ocean surfaces was 1.64°F (0.91°C) above the 20th century average of 56.3°F (13.5°C), the 2nd highest since records began in 1880. Only 2016 was warmer.
NOAA calculations resemble the analysis released by NASA earlier this week, indicating that June was the 4th warmest on record globally. This small difference reflects the fact the NASA’s calculations are extended to account for temperature changes at the poles, where there are far fewer monitoring stations, whereas the NOAA calculations exclude this extrapolation.
To better gauge how much warming has taken place since the early industrial era, and with reference to the 2°C warming threshold agreed upon at the 2015 Paris Climate Summit, we have combined the NASA and NOAA analyses and compared them to a 1881-1910 baseline (enclosed bar chart). Using these calculations indicates that June 2017 was 1.01°C (1.81°F) above that early industrial baseline.
Enclosed are two core graphics, with versions containing no title or background:
• Each month’s global temperature anomaly over the last 12 months, with previous months shadowed to the left
• Year-to-date temperature percentiles through June 2017, with the hottest locations in Mexico, southwestern Europe, and eastern Russia