IRI Climate Digest June
June Global Climate Summary
Climatological Background In June, the sun's
maximum northward location is achieved at 23.6 degrees north. Surface heating
of the continents has initiated summer monsoonal systems or northern hemisphere
warm season rains. In the Southern Hemisphere winter is setting in with
fewer daylight hours and cooler temperatures. The southern parts of South
Africa, Australia and South America are now in the path of mid latitude
Monthly Mean Temperature (1961-1990), data from the Climate Research
Unit, University of East Anglia
|Monthly Mean Precipitation (1961-1990), with data from
the Climate Research Unit, University of East Anglia
Temperatures Over Land
Europe and North Africa: Southern and central Europe
and Northern Africa continued to experience well above average temperatures.
Asia: Temperatures were 1 to 3 C above average in
a broad west-east band extending from west central Russia to Siberia and
into northeastern China.
Australia: Northern coastal regions of Western Australia and
the Northern Territory were 1 to 2 C cooler than average.
South America: Above average temperatures were observed
over most other sections of the continent.
North America: Cooler than average temperatures characterized
the interior of the continent with the exception of the west coast and
|Temperature Difference from the 1961-1990 mean, with
data from NCEP Climate Prediction Center, CAMS.
Africa: Rainfall continued below average in northern Kenya,
south-central Ethiopia and southeastern Sudan. Seasonal rains developed
in near average fashion across western Africa and into the Sahel.
Australia: Rainfall was below average across southern
Victoria and Tasmania as well as coastal sections of south central Western
Indonesia: Above average rainfall was once
again observed over most of the region.
Southern and Southeast Asia: Heavy rainfall was observed
in Bangladesh and Thailand. The summer monsoon developed in a near
average progression across India although areas in the northwest saw below
average rainfall for the month.
China: Below average rainfall was again observed
across much of Manchuria and the North China Plain. Locally heavy
rains fell along eastern coastal sections and unusually heavy rains fell
in Gansu province in the north.
South America: Central Chile had unusually heavy rainfall
during June with heavy snow in the mountains of both Chile and western
Argentina. The dry season developed across southern Brazil in the
wake of an unusually dry rainy season.
North and Central America: Wet conditions prevailed from
northeastern Canada southwestward to the Mexican border helping to ease
drought conditions in the United States. Below average rainfall continued
in the southeastern United States intensifying local drought conditions
there. The rainy season developed across southern Mexico and intensified
across central America with locally heavy rains.
Europe: Precipitation was well below average across much
of south central sections during June.
|Precipitation Difference from 1961-1990 mean, with
data from NCEP Climate Prediction Center, CAMS-OPI.
Tropics: La Niña (colder than average) conditions
continue to weaken in the central equatorial Pacific. Neither oceanic observations
nor model predictions suggest a transition towards warmer than average
conditions (El Niño) in the coming months.
Extratropics: Large positive anomalies in the Northern
Hemisphere mid latitudes (e.g., +4 C off the northern coast of Japan).
Monthly Sea Surface Temperature Difference from the 1950-1979 mean,
with data from the Environmental Modeling Center, NCEP/NOAA.