According to NOAA scientists, the globally averaged temperature over land and ocean surfaces for June 2014 was the highest for June since record keeping began in 1880. It also marked the 38th consecutive June and 352nd consecutive month with a global temperature above the 20th century average. The last below-average global temperature for June was in 1976 and the last below-average global temperature for any month was February 1985.
Most of the world experienced warmer-than-average monthly temperatures, with record warmth across part of southeastern Greenland, parts of northern South America, areas in eastern and central Africa, and sections of southern and southeastern Asia. Similar to May, scattered sections across every major ocean basin were also record warm. Notably, large parts of the western equatorial and northeastern Pacific Ocean and most of the Indian Ocean were record warm or much warmer than average for the month. A few areas in North America, Far East Russia, and small parts of central and northeastern Europe were cooler or much cooler than average.
A monthly summary (http://www.ncdc.noaa.gov/sotc/global/2014/6) from NOAA's National Climatic Data Center in Asheville, NC, is part of the suite of climate services NOAA provides to government, the business sector, academia and the public to support informed decision making.
Selected significant climate anomalies and events: June 2014.
Global temperature highlights: June
- The combined average temperature over global land and ocean surfaces for June 2014 was record high for the month at 61.20°F (16.22°C), or 1.30°F (0.72°C) above the 20th century average of 59.9°F (15.5°C). This surpasses the previous record, set in 2010, by (0.05°F) 0.03°C. Nine of the ten warmest Junes on record have all occurred during the 21st century, including each of the past five years. The margin of error associated with this temperature is +/- 0.16°F (0.09°C).
- The June global land temperature was the seventh highest for June on record at 1.71°F (0.95°C) above the 20th century average of 55.9°F (13.3°C). The margin of error is +/- 0.25°F (0.14°C). The seven highest June global land surface temperatures have occurred in the past decade.
- Thirty-one countries across every continent, with the exception of Antarctica, reported at least one station with a record warm June temperature. The period of record varies by station. Some national temperature highlights include:
- New Zealand observed its warmest June since national records began in 1909. The warmth was notable for both its intensity and coverage, with above-average temperatures from the top of the North Island to the bottom of the South Island.
- France observed its fifth warmest June in the country's 115-year period of record at 2.3°F (1.3°C) above the 1981-2010 average. A week-long heat wave contributed to the overall warmth for the month.
- Parts of Greenland were record warm during June. Kangerlussuaq in southwestern Greenland observed its record highest maximum June temperature of 23.2°C (73.8°F) on June 15, surpassing the previous record of 23.1°C (73.6°F) set in both 1988 and 2002. Records at this station date back to 1958.
- For the ocean, the June global sea surface temperature was 1.15°F (0.64°C) above the 20th century average of 61.5°F (16.4°C), the highest for June on record. This surpasses the previous all-time record for any month by 0.09°F (0.05°C), set in June 1998 and tied in October 2003, July 2009, and just last month in May 2014. The margin of error is +/- 0.07°F (0.04°C).
- Although neither El Niño nor La Niña conditions were present across the central and eastern equatorial Pacific Ocean during June 2014, NOAA's Climate Prediction Center estimates that there is about a 70 percent chance that El Niño conditions will develop during Northern Hemisphere summer 2014 and 80 percent chance it will develop during the fall and winter.
Polar ice highlights: June
- The average Arctic sea ice extent for June was 4.4 million square miles, 220,000 square miles (4.9 percent) below the 1981-2010 average and the sixth smallest June extent since records began in 1979, according to the National Snow and Ice Data Center. The seasonal sea ice extent decline during June was faster than average, with rapid ice loss near the end of month.
- On the opposite pole, the Antarctic sea ice extent for June was 5.9 million square miles, 510,000 square miles (9.6 percent) above the 1981-2010 average. This marked the largest June Antarctic sea ice extent since records began in 1979, surpassing the previous record large June Antarctic sea ice extent that occurred in 2010 by about 100,000 square miles. Seven of the past 12 months have had a record large Antarctic sea ice extent.
- Combining the Arctic and Antarctic sea ice, June global sea ice was 10.3 million square miles, 2.9 percent above the 1981-2010 average. This was the third largest global June sea ice extent on record and the largest since 1982.
Precipitation highlights: June
- Extreme wetness was observed during June over regions including central North America and parts of eastern and northern Europe. Extreme dryness was scattered across different parts of the globe, including much of South Asia and Australia.
- In India, the southwest monsoon onset over Kerala occurred on June 6, five days later than the normal date of June 1. For the period June 1-30, rainfall across the country was just 60 percent of the 1951-2000 average for the country as a whole. Every region experienced rainfall deficits during this period, ranging from 43 percent of average in Central India to 72 percent of average on the South Peninsula. The monsoon season lasts from early June through late September.
- Australia received 68 percent of average rainfall during June. Western Australia received just 28 percent of their average rainfall for the month, the seventh lowest for June for the state.
Global temperature highlights: Year-to-date
- The first half of 2014 (January-June) tied with 2002 as the third warmest such period on record, with a combined global land and ocean average surface temperature 1.21°F (0.67°C) above the 20th century average of 56.3°F (13.5°C). Only 2010 and 1998 were warmer. Thirteen of the past fourteen such periods have occurred during the 21st century. The margin of error is +/- 0.18°F (0.10°C).
- The January-June worldwide land surface temperature was 1.87°F (1.04°C) above the 20th century average, tying with 1998 and 2005 as the fourth warmest such period on record. The margin of error is +/- 0.41°F (0.23°C).
- The global ocean surface temperature for the year to date was 0.95°F (0.53°C) above average, the third warmest such period on record behind 1998 and 2010. The margin of error is +/-0.09°F (0.05°C).
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Materials provided by NOAA/National Climatic Data Center. Note: Content may be edited for style and length.