Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 210524
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1224 AM EST SUN DEC 21 2014


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 20 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         35    245 PM  64    1988  45    -10       58
  MINIMUM         20    625 AM   8    1991  26     -6       42
  AVERAGE         28                        35     -7       50

PRECIPITATION (IN)
  YESTERDAY        0.00          0.66 1973   0.08  -0.08     0.00
  MONTH TO DATE    2.07                      2.03   0.04     3.00
  SINCE DEC 1      2.07                      2.03   0.04     3.00
  SINCE JAN 1     44.88                     40.61   4.27    42.76

SNOWFALL (IN)
  YESTERDAY        0.0           4.3  1966   0.1   -0.1
  MONTH TO DATE    T                         2.0   -2.0
  SINCE JUL 1      1.6                       2.5   -0.9
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       37                        30      7       15
  MONTH TO DATE  526                       544    -18      542
  SINCE DEC 1    526                       544    -18      542
  SINCE JUL 1   1520                      1460     60     1506

 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    12   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    NW (330)
  AVERAGE WIND SPEED     1.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           500 AM
 LOWEST     56           100 PM
 AVERAGE    74

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   44        70      2013
 MINIMUM TEMPERATURE (F)   26         4      1989


SUNRISE AND SUNSET
DECEMBER 21 2014......SUNRISE   725 AM EST   SUNSET   451 PM EST
DECEMBER 22 2014......SUNRISE   725 AM EST   SUNSET   451 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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