Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 172132
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
431 PM EST SUN DEC 17 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 17 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE
                VALUE   (LST)  VALUE       VALUE  FROM
                                                  NORMAL
...............................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         50    257 PM  64    1984  46      4
                                      1939
  MINIMUM         30    406 AM  10    1876  32     -2
  AVERAGE         40                        39      1

PRECIPITATION (IN)
  TODAY            0.00          2.43 1888   0.10  -0.10
  MONTH TO DATE    0.29                      1.78  -1.49
  SINCE DEC 1      0.29                      1.78  -1.49
  SINCE JAN 1     35.39                     38.47  -3.08

SNOWFALL (IN)
  TODAY            0.0          11.5  1932   0.1   -0.1
  MONTH TO DATE    1.7                       1.1    0.6
  SINCE JUL 1      1.7                       1.6    0.1
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           25                               -1
  MONTH TO DATE  404                                3
  SINCE DEC 1    404                                3
  SINCE JUL 1    953                             -143

 COOLING
  TODAY            0                                0
  MONTH TO DATE    0                                0
  SINCE DEC 1      0                                0
  SINCE JAN 1   1826                              277
...............................................................


WIND (MPH)
  HIGHEST WIND SPEED     8   HIGHEST WIND DIRECTION     S (180)
  HIGHEST GUST SPEED    10   HIGHEST GUST DIRECTION     S (190)
  AVERAGE WIND SPEED     2.4




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    85
 LOWEST     50
 AVERAGE    68

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   46        74      2006
 MINIMUM TEMPERATURE (F)   32        10      1926
                                             1919


SUNRISE AND SUNSET
DECEMBER 17 2017......SUNRISE   721 AM EST   SUNSET   448 PM EST
DECEMBER 18 2017......SUNRISE   721 AM EST   SUNSET   448 PM EST


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




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