Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 132127
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
426 PM EST WED DEC 13 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 13 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         34    330 PM  73    2015  46    -12       46
  MINIMUM         20    755 AM   7    1988  28     -8       32
  AVERAGE         27                        37    -10       39

PRECIPITATION (IN)
  TODAY            0.00          1.47 1996   0.09  -0.09     0.00
  MONTH TO DATE    0.34                      1.39  -1.05     1.48
  SINCE DEC 1      0.34                      1.39  -1.05     1.48
  SINCE JAN 1     40.23                     39.97   0.26    34.45

SNOWFALL (IN)
  TODAY            0.0           8.8  1966   0.1   -0.1
  MONTH TO DATE    4.0                       1.2    2.8
  SINCE JUL 1      4.0                       1.7    2.3
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           38                        28     10       26
  MONTH TO DATE  345                       340      5      323
  SINCE DEC 1    345                       340      5      323
  SINCE JUL 1   1139                      1256   -117     1050

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1281                      1178    103     1559
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    32   HIGHEST WIND DIRECTION    NW (300)
  HIGHEST GUST SPEED    40   HIGHEST GUST DIRECTION    NW (300)
  AVERAGE WIND SPEED    16.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    45           400 AM
 LOWEST     32           300 PM
 AVERAGE    39

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   46        69      2015
 MINIMUM TEMPERATURE (F)   27         3      1989


SUNRISE AND SUNSET
DECEMBER 13 2017......SUNRISE   720 AM EST   SUNSET   448 PM EST
DECEMBER 14 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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