Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 112139
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
439 PM EST MON DEC 11 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 11 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         49    130 PM  68    1979  48      1
                                      1971
                                      1897
  MINIMUM         35    756 AM  12    1917  34      1
                                      1904
                                      1880
  AVERAGE         42                        41      1

PRECIPITATION (IN)
  TODAY            0.00          1.66 2008   0.11  -0.11
  MONTH TO DATE    0.28                      1.19  -0.91
  SINCE DEC 1      0.28                      1.19  -0.91
  SINCE JAN 1     35.38                     37.88  -2.50

SNOWFALL (IN)
  TODAY            0.0           6.8  1960   0.1   -0.1
  MONTH TO DATE    2.0                       0.7    1.3
  SINCE JUL 1      2.0                       1.2    0.8
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           23                               -1
  MONTH TO DATE  224                              -25
  SINCE DEC 1    224                              -25
  SINCE JUL 1    773                             -171

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


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION    SE (150)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     S (160)
  AVERAGE WIND SPEED     5.6




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    75
 LOWEST     39
 AVERAGE    57

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   48        71      1873
 MINIMUM TEMPERATURE (F)   33        13      1988
                                             1957


SUNRISE AND SUNSET
DECEMBER 11 2017......SUNRISE   717 AM EST   SUNSET   446 PM EST
DECEMBER 12 2017......SUNRISE   717 AM EST   SUNSET   447 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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