Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 200524
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1224 AM EST SAT DEC 20 2014


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 19 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         38    329 PM  63    1967  45     -7       60
  MINIMUM         29   1159 PM  -2    1989  26      3       23
  AVERAGE         34                        35     -1       42

PRECIPITATION (IN)
  YESTERDAY        0.00          1.34 2009   0.09  -0.09     0.00
  MONTH TO DATE    2.07                      1.95   0.12     3.00
  SINCE DEC 1      2.07                      1.95   0.12     3.00
  SINCE JAN 1     44.88                     40.53   4.35    42.76

SNOWFALL (IN)
  YESTERDAY        0.0          16.0  2009   0.1   -0.1
  MONTH TO DATE    T                         1.9   -1.9
  SINCE JUL 1      1.6                       2.4   -0.8
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       31                        30      1       23
  MONTH TO DATE  489                       514    -25      527
  SINCE DEC 1    489                       514    -25      527
  SINCE JUL 1   1483                      1430     53     1491

 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    20   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    24   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    10.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    69           700 PM
 LOWEST     52           300 PM
 AVERAGE    61

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   45        64      1988
 MINIMUM TEMPERATURE (F)   26         8      1991


SUNRISE AND SUNSET
DECEMBER 20 2014......SUNRISE   724 AM EST   SUNSET   450 PM EST
DECEMBER 21 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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