Earth just had its hottest June on record, on track for warmest July

Temperature differences from normal during June globally, according to NASA.

July 15 at 4:21 PM

Boosted by a historic heat wave in Europe and unusually warm conditions across the Arctic and Eurasia, the average temperature of the planet soared to its highest level ever recorded in June.

According to data released Monday by NASA, the global average temperature was 1.7 degrees Fahrenheit (0.93 Celsius) above the June norm (based on a 1951-to-1980 baseline), easily breaking the previous June record of 1.5 degrees Fahrenheit (0.82 Celsius), set in 2016, above the average.

The month was punctuated by a severe heat wave that struck Western Europe in particular during the last week, with numerous all-time-hottest-temperature records falling in countries with centuries-old data sets.

Notably, 13 locations in France surpassed their highest temperature ever recorded. The heat wave’s highest temperature of 114.6 degrees Fahrenheit (45.9 Celsius), posted in Gallargues-le-Montueux, was 3.2 degrees above the old record, set during an infamous heat wave in July and August 2003.

NASA is the second institution to confirm that it was Earth’s hottest June, as the Copernicus Climate Change Service had already determined that June 2019 was the warmest such month on record for Europe and globally.

Brian Brettschneider@Climatologist49

According to NASA GISTEMP, June 2019 was the warmest June on record 1880-present). Of the 11,756 grid cells with data for every year since 1900, 716 had their warmest June on record. 0 had their coolest June (or 2nd, 3rd, 4th, or 5th coolest). [reposted to fix typo]

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June featured unusually mild conditions in the Arctic, particularly in Greenland, where the melt season got off to an early start.

July is picking up right where June left off. Zeke Hausfather, a climate scientist based in Berkeley, Calif., tweeted that the month so far ranks as the hottest on record narrowly ahead of 2017, the previous record holder.

“If this July turns out to be the warmest July (it has a good shot at it), it will be the warmest month we have measured on Earth!” tweeted Michael Mann, a climate scientist at Pennsylvania State University.

Stefan Rahmstorf@rahmstorf

NASA global mean June temperature is out! Guess what – it’s been the hottest June on record. Definitely felt like that in Germany…

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Like June, July has featured some notable high-temperature extremes, including in Nunavut, Canada, the northernmost permanently inhabited location on Earth. It hit a record high of 69.8 degrees Fahrenheit (21.0 Celsius) Sunday, breaking the previous record of 20 Celsius.

In addition, Alaska last week posted its hottest two days on record, highlighted by a temperature of 90 degrees in Anchorage for the first time.

The June monthly record and July’s toasty first half raises the odds that 2019 could make a run for a top-three finish for warmest year, rather than top five. According to data from NASA and the National Oceanic and Atmospheric Administration, nine of the 10 warmest years on record have occurred since 2000, a trend that scientists have tied mainly to human emissions of greenhouse gases.

Gavin Schmidt


With @NASAGISS temperature data for the first six months of the year in, what is the prospect for 2019?
90% chance of being warmer than last year
~5% chance of new record
99.9% change of being a top 5 year and > 1ºC above the late 19th C.

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