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000
CXUS51 KLWX 051939
CLMDCA

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
338 PM EDT WED JUN 5 2013

...................................

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF MAY 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              99   05/31/1991
 LOW               33   05/11/1906
HIGHEST            91   05/31        90       1
LOWEST             42   05/14        44      -2
AVG. MAXIMUM     75.8              75.4     0.4     80.1
AVG. MINIMUM     57.5              56.5     1.0     62.7
MEAN             66.7              66.0     0.7
DAYS MAX >= 90      3               1.1     1.9
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.69   1953
 MINIMUM         0.41   1939
TOTALS           2.82              3.99   -1.17     3.28
DAILY AVG.       0.09              0.13   -0.04
DAYS >= .01        11              11.1    -0.1
DAYS >= .10         4               7.3    -3.3
DAYS >= .50         2               2.9    -0.9
DAYS >= 1.00        1               0.9     0.1
GREATEST
 24 HR. TOTAL    1.34   05/28

DEGREE_DAYS
HEATING TOTAL      83                79       4        4
 SINCE 7/1       3765              4025    -260     3045
COOLING TOTAL     144               108      36      209
 SINCE 1/1        185               134      51      259
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.7
HIGHEST WIND SPEED/DIRECTION    29/100    DATE  05/28
HIGHEST GUST SPEED/DIRECTION    38/320    DATE  05/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         17

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

THE MONTHLY AVERAGE TEMPERATURE FOR MAY WAS NEAR NORMAL. IT WAS THE
FIRST TIME SINCE 2009 THAT THE MAY AVERAGE TEMPERATURE FOR
WASHINGTON DC WAS NOT WELL ABOVE NORMAL.

THE FIRST 90-DEGREE DAY OF THE MONTH DID NOT OCCUR UNTIL THE 29TH...
WHICH IS THE LATEST WITHOUT A 90-DEGREE DAY IN MAY SINCE 2009. THERE
WERE NO 90-DEGREE DAYS RECORDED IN MAY 2009.

THE MINIMUM TEMPERATURE OF 42F DEGREES ON THE 14TH WAS THE LOWEST
TEMPERATURE IN MAY SINCE 3 MAY 2005 WHEN IT WAS 38F DEGREES.

NO DAILY TEMPERATURE RECORDS WERE SET THIS MONTH.

RAINFALL THIS MONTH WAS BELOW NORMAL. NEARLY HALF OF THE MONTHLY
PRECIPITATION FELL ON THE 28TH. THE 1.34 INCHES OF RAIN THAT FELL ON
THE 28TH WAS THE HIGHEST DAILY RAINFALL AMOUNT RECORDED IN MAY SINCE
26 MAY 2009 /1.65 INCHES/.

$$
JRK