Three More Global Temperature Records Broken —NOAA
State of the Climate Report: November 2015
- November 2015 was warmest November on record Globally
- September–November was the warmest such period
- Year-to-date was record warm
The November average temperature across land and ocean surfaces (SST) rose 1.75°F (0.97°C) above the 20th century average of 12.9°C (55.2°F), the highest for November in the 1880–2015 record, surpassing the previous record set in 2013 by 0.27°F (0.15°C).
- November warmth broke a monthly global temperature record for the seventh consecutive month.
- The temperature departure from average for November is also the second highest among all months in the 136-year period of record. The highest departure of 0.99°C (1.79°F) occurred last month.
- Globally-averaged land surface temperature for November was 2.36°F (1.31°C) above the 20th century average.
- Globally-averaged SST was 1.51°F (0.84°C) above the 20th century average. This was the highest for November in the 1880–2015 record, surpassing the previous record set last year by 0.36°F (0.20°C).
- The average Arctic sea ice extent for November 2015 was 360,000 square miles (~ 930,000km² ), or 8.3 percent below the 1981–2010 average. This was the sixth smallest November extent since records began in 1979.
- Antarctic sea ice extent during November 2015 was 80,000 square miles (1.2 percent) above the 1981–2010 average, the 14th largest for November in the 37-year period of record.
November 2015 Blended Land and Sea Surface Temperature Anomalies in degrees Celsius
Autumn Temperatures
Additionally, September, October, and November 2015 had the three highest monthly temperature departures on record.
Out of 1,630 monthly records (1880–2015 record):
- Eight months of 2015 are among the 10 highest monthly temperature departures from their respective averages.
- All 11 months of 2015 so far are among the 25 highest.
Selected Climate Events & Anomalies for November 2015
September–November Temperature
The September–November seasonal temperature was 0.96°C (1.73°F) above the 20th century average of 14.0°C (57.1°F). This marks the highest departure from average for the season in the 136-year period of record, surpassing the previous record set last year by 0.21°C (0.38°F).
The globally-averaged temperature across land surfaces was also the highest on record for September–November, at 1.27°C (2.29°F) above the 20th century average of 9.1°C (48.3°F).
- Most of the Americas from Mexico through the northern half of South America were record warm, as were scattered regions across Africa, southern and southeastern Asia, and southern Australia.
- Across the world’s oceans, the September–November average sea surface temperature was 0.84°C (1.51°F) above the 20th century average of 16.0°C (60.7°F), the highest for September–November on record, surpassing the previous record set last year by 0.27°C (0.15°F).
Year-to-date Temperature
The first 11 months of 2015 were the warmest such period on record across the world’s land and ocean surfaces, at 0.87°C (1.57°F) above the 20th century average of 14.0°C (57.2°F), surpassing the previous record set last year by 0.14°C (0.25°F).
- Nine of the first eleven months in 2015 have been record warm for their respective months, with January second warmest for January and April third warmest.
- The December global temperature would have to be at least 0.81°C (1.46°F) below average—or 0.24°C (0.43°F) colder than the current record low December temperature of 1916—for 2015 to not become the warmest year in the 136-year period of record.
The average global sea surface temperature for the year-to-date was the highest for January–November in the 136-year period of record, at 0.72°C (1.30°F) above average, surpassing the previous record set last year by 0.09°C (0.16°F).
The average land surface temperature was also record high, at 1.27°C (2.29°F) above average, surpassing the previous record of 2010 by 0.15°C (0.27°F).
January–November 2015 Blended Land and Sea Surface Temperature Percentiles
NOAA National Centers for Environmental Information, State of the Climate: Global Analysis for November 2015, published online December 2015, retrieved on December 18, 2015 from http://www.ncdc.noaa.gov/sotc/global/201511.