Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 122136
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
436 PM EST TUE DEC 12 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 12 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    146 PM  71    1873  48      1
  MINIMUM         41    151 AM  13    1988  33      8
                                      1957
  AVERAGE         45                        40      5

PRECIPITATION (IN)
  TODAY            0.00          1.36 1959   0.11  -0.11
  MONTH TO DATE    0.28                      1.30  -1.02
  SINCE DEC 1      0.28                      1.30  -1.02
  SINCE JAN 1     35.38                     37.99  -2.61

SNOWFALL (IN)
  TODAY            0.0           6.6  1982   0.0    0.0
  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           20                               -5
  MONTH TO DATE  244                              -30
  SINCE DEC 1    244                              -30
  SINCE JUL 1    793                             -176

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


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    37   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    10.0




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    73
 LOWEST     46
 AVERAGE    60

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   47        71      2015
                                             1889
 MINIMUM TEMPERATURE (F)   33        11      1960


SUNRISE AND SUNSET
DECEMBER 12 2017......SUNRISE   717 AM EST   SUNSET   447 PM EST
DECEMBER 13 2017......SUNRISE   718 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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