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952
CDUS41 KLWX 180525
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1224 AM EST THU DEC 18 2014


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 17 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         52   1207 PM  70    1984  45      7       39
  MINIMUM         33    708 AM   3    1989  27      6       32
  AVERAGE         43                        36      7       36

PRECIPITATION (IN)
  YESTERDAY        0.00          0.75 2000   0.09  -0.09     0.02
  MONTH TO DATE    2.07                      1.77   0.30     3.00
  SINCE DEC 1      2.07                      1.77   0.30     3.00
  SINCE JAN 1     44.88                     40.35   4.53    42.76

SNOWFALL (IN)
  YESTERDAY        0.0           4.3  1973   0.1   -0.1
  MONTH TO DATE    T                         1.7   -1.7
  SINCE JUL 1      1.6                       2.2   -0.6
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       22                        29     -7       29
  MONTH TO DATE  428                       455    -27      473
  SINCE DEC 1    428                       455    -27      473
  SINCE JUL 1   1422                      1371     51     1437

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    968                      1178   -210     1272
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    23   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED     9.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  FOG
  FOG W/VISIBILITY <= 1/4 MILE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     46           200 PM
 AVERAGE    73

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        76      2006
 MINIMUM TEMPERATURE (F)   26         3      1989


SUNRISE AND SUNSET
DECEMBER 18 2014......SUNRISE   723 AM EST   SUNSET   450 PM EST
DECEMBER 19 2014......SUNRISE   724 AM EST   SUNSET   450 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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