October 2015 warmest October on 136-year record globally; year to date also record warm —NOAA
Global October temperature was the highest for the month in the 136-year period of record. The combined average temperature over global land and sea surfaces was 0.98°C (1.76°F) above the 20th century average of 14.0°C (57.1°F), according to the State of Climate report issued by NOAA.
- October was the sixth consecutive month a monthly global temperature record has been broken and was also the greatest departure from average for any month in the 1,630 months of recordkeeping.
- The October average temperature across global land surfaces was 1.33°C (2.39°F) above the 20th century average, the highest for October on record. This surpasses the previous record set in October 2011 by 0.17°C (0.31°F).
- October global sea surface temperature was 0.85°C (1.53°F) above the 20th century average of 15.9°C (60.6°F), the highest departure for October on record. This surpasses the previous record set in 2014 by 0.15°C (0.27°F).
October 2015 Blended Land and Sea Surface Temperature Percentiles
January–October 2015 Blended Land and Sea Surface Temperature Anomalies in degrees Celsius
Record Temperatures (Year to Date)
The first 10 months of 2015 comprised the warmest such period on record across the world’s land and ocean surfaces, at 0.86°C (1.55°F) above the 20th century average, surpassing the previous record of 2014 by 0.12°C (0.22°F). This margin is larger than the uncertainty associated with the dataset. To date, eight months this year have been record warm for their respective months. January was the second warmest January on record and April third warmest.
The average global sea surface temperature of +0.71°C (+1.28°F) was the highest for January–October in the 136-year period of record, surpassing the previous record of 2014 by 0.08°C (0.14°F). This margin is larger than the uncertainty associated with the dataset. The average land surface temperature departure from average of +1.28°C (+2.30°F) was also the highest on record for October, surpassing the previous record of 2007 by 0.17°C (0.31°F).
Source: NOAA National Centers for Environmental Information, State of the Climate: Global Analysis for October 2015, published online November 2015, retrieved on November 19, 2015 from http://www.ncdc.noaa.gov/sotc/global/201510.