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The combined average temperature over global land and ocean surfaces for September tied with 2005 as record highest for September, at 60.21°F (15.67°C) or 1.21°F (0.67°C) above the 20th century average. The margin of error associated with this temperature is ±0.20°F (0.11°C).
September marked the 36th consecutive September and 331st consecutive month with a global temperature above the 20th century average. The last below-average September was September 1976 and the last below-average month was February 1985.
The global land temperature was the third warmest September on record, at 1.84°F (1.02°C) above the 20th century average of 53.6°F (12.0°C). The margin of error is ±0.45°F (0.25°C).
Higher-than-average monthly temperatures were most notable across central Russia, Japan, western Australia, northern Argentina, Paraguay, western Canada, and southern Greenland, while temperatures were below average across far eastern Russia, western Alaska, southern Africa, parts of the upper midwest and southeast United States, and much of China.
Record to near-record warmth over land from April to September and increasing global ocean temperatures in the eastern equatorial Pacific Ocean resulted in the first nine months of 2012 ranking as the eighth warmest such period on record, with a combined global land and ocean average surface temperature of 1.03°F (0.57°C) above the 20th century average of 57.5°F (14.1°C). The margin of error is ±0.18°F (0.10°C).
The January–September worldwide land surface temperature was 1.69°F (0.94°C) above the 20th century average, marking the sixth warmest such period on record. The margin of error is ±0.40°F (0.22°C).
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