September 2019: Earth’s Warmest September on Record

Our global temperature continued its upward trend last month. September 2019 tied September 2015 as the warmest September ever recorded on this planet.

According to NOAA’s National Centers for Environmental Information, Earth’s combined average temperature for the month – over both land and sea surfaces – was 60.71°F. That is 1.71°F above the 20th-century average. September also marked the 417th consecutive month with a global temperature above its long-term norm. That means the last time any month posted a below-average reading was December 1984.

Furthermore, the ten warmest Septembers have all occurred since 2005, with the last five years being the five warmest on record.

While heat dominated most of the planet this September, some places were particularly warm, including Alaska, the southeastern United States, and large parts of Asia and Canada. For the contiguous US as a whole, the month tied September 2015 as the second warmest September on record.

With ENSO neutral conditions prevailing in the Pacific, these soaring temperatures are largely attributed to the long-term trend of human-caused climate change. As greenhouse gases continue to spew into the atmosphere, global temperatures are expected to continue to rise.

Year to date, the first nine months of 2019 were the second warmest such period of any year on record. At this point, it is very likely that 2019 will finish among the top five warmest years on record. Global temperature records date back to 1880.

September 2019 was Earth’s warmest September on record. Credit: NOAA