The Earth experienced its eighth warmest September since record keeping began in 1880. The annual minimum Arctic sea ice extent was reached on September 9 and ranked as the second smallest extent since satellite records began in 1979.
This monthly analysis from NOAA’s National Climatic Data Center is part of the suite of climate services NOAA provides government, business and community leaders so they can make informed decisions.
Global Temperature Highlights: September 2011
· The combined global land and ocean average surface temperature for September was the eighth warmest on record at 59.95 degrees F (15.53 degrees C), which is 0.95 degrees F (0.53 degrees C) above the 20th century average of 59.0 degrees F (15.0 degrees C). The margin of error associated with this temperature is +/- 0.20 degrees F (0.11 degrees C).
· Separately, the global land surface temperature was 1.57 degrees F (0.87 degrees C) above the 20th century average of 53.6 degrees F (12.0 degrees C), making this the fourth warmest September on record. The margin of error is +/- 0.43 degrees F (0.24 degrees C). Warmer-than-average conditions occurred across Europe, northern and western Africa, western Russia, the western and northeastern United States, Canada, and Mexico. Cooler-than-average regions included much of eastern Asia, and part of the central United States.
· The September global ocean surface temperature was 0.72 degrees F (0.40 degrees C) above the 20th century average of 61.1 degrees F (16.2 degrees C), making it the 14th warmest September on record. The margin of error is +/- 0.07 degrees F (0.04 degrees C). The warmth was most pronounced across the north central and northwest Pacific Ocean and within about the 30°N–40°N latitude belt across the Atlantic.
· The United Kingdom marked its warmest September since 2006 and sixth warmest in the last 100 years, at 2.7 degrees F (1.5 degrees C) above the 1971–2000 average.
· Spain had its warmest September since 1990 and fifth warmest for the past 50 years, at 3.2 degrees F (1.8 degrees C) above the 1971–2000 average.