NOAA Monthy Weather Summary for Washington, DC:
HEAT WAS THE MAIN CLIMATE STORY FOR JUNE 2010 IN WASHINGTON.
AT REAGAN NATIONAL AIRPORT…THE AVERAGE MONTHLY TEMPERATURE WAS
80.6F…WHICH WAS THE WARMEST JUNE ON RECORD SURPASSING THE PREVIOUS
WARMEST JUNE AVERAGE OF 79.4 DEGREES IN 1994. IT WAS THE FIRST TIME
WASHINGTON AVERAGED 80 DEGREES OR ABOVE FOR THE MONTH OF JUNE. THE
AVERAGE TEMPERATURE THIS JUNE WAS MORE THAN ONE DEGREE HIGHER THAN
THE 1971-2000 NORMAL TEMPERATURE FOR JULY.
HIGH TEMPERATURES THIS JUNE OF 90 DEGREES OR HIGHER WERE RECORDED ON
18 DAYS…WHICH TIES WITH JUNE 1943 WITH THE MOST NUMBER OF 90
DEGREE DAYS IN JUNE. THE NORMAL NUMBER OF 90 DEGREE DAYS IN JUNE IS
ABOUT 7. HIGH TEMPERATURES OF 95 OR MORE OCCURRED ON 7 DAYS…WHICH
TIES FOR THE MOST NUMBER OF 95 OR BETTER DAYS THAT ALSO OCCURRED IN
JUNE 1991.
HIGH TEMPERATURES OF AT LEAST 90 DEGREES WERE RECORDED FROM THE
19TH-29TH…DURING WHICH THE HIGH TEMPERATURES AVERAGED 95.4
DEGREES. THIS 11-DAY STRETCH OF 90-DEGREE WEATHER DURING JUNE IS THE
SECOND LONGEST STREAK OF 90 DEG DAYS…THE LONGEST STREAK BEING THE
14-DAY STRETCH OF 90 DEG DAYS THAT SPANNED JUNE 13-26 IN 1994.
DAILY RECORD HIGH TEMPERATURES OF 100 DEGREES AND 99 DEGREES WERE
BROKEN ON THE 24TH AND 27TH RESPECTIVELY. THE 100 DEGREE READING WAS
THE FIRST TIME SINCE AUGUST 8 IN 2007 THAT TEMPERATURES REACHED THE
CENTURY MARK…AND THE FIRST TIME IN JUNE SINCE 25 JUNE 1997. THE
TEMPERATURE HAS REACHED THE CENTURY MARK 16 TIMES DURING JUNE IN THE
139 YEARS OF TEMPERATURE RECORDS GOING BACK TO 1872.
TWO DAILY RECORD HIGH MINIMUM TEMPERATURES WERE SET AND ANOTHER WAS
TIED IN WASHINGTON. LOW TEMPERATURES OF 76 DEGREES ON THE 21ST AND
78 DEGREES ON THE 24TH BROKE THE RESPECTIVE DAILY RECORDS OF 75
DEGREES IN 1893 AND 77 DEGREES IN 1874.
JUNE WAS ALSO DRIER THAN NORMAL. THE 1.87 INCHES OF RAINFALL IS THE
SECOND DRIEST JUNE IN THE LAST 15 YEARS…WITH ONLY THE 1.38 INCHES
OF RAINFALL IN JUNE 2007 BEING DRIER. ALMOST HALF OF THE MONTH`S
RAINFALL WAS RECORDED IN A THUNDERSTORM ON THE 28TH.
http://www.weather.gov/climate/index.php?wfo=lwx
Hi, it is also important to note the full picture – that at the same time as the record temperatures were being reported in these centres (see article above), cooler-than average temperatures were being recorded in other parts of the world at the same time (see below). :
“… cooler-than-average conditions affected Scandinavia, southern China and the US northwest.
The Beijing Climate Center found that Inner Mongolia, Heilongjiang and Jilin experienced their warmest June since records began in 1951, while Guizhou saw its coolest June ever.
Spain’s nationwide temperatures made June the coolest in 13 years, according to its meteorological surface.
Global ocean surface temperatures averaged 0.97 degrees (0.54 Celsius) above last century’s average of 61.5 degrees Fahrenheit (16.4 Celsius) — the fourth warmest June since records began. The Atlantic Ocean saw the most pronounced warmth, NOAA said.
The average land surface temperature that month was 1.93 degrees Fahrenheit (1.07 Celsius) more than the 20th century average of 55.9 degrees Fahrenheit (13.3 Celsius) — the warmest ever.
Meanwhile, sea surface temperatures were declining throughout the equatorial Pacific Ocean, in line with the end of El Nino, a climate pattern that lasts an average of five years during which unusually warm sea surface temperatures in the Pacific Ocean move east.
NOAA’s Climate Prediction Center forecast that La Nina conditions, where ocean waters in the east-central equatorial Pacific are unusually cool, would likely develop during the northern hemisphere summer this year.”
Best regards.