Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 162132
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
430 PM EST SAT DEC 16 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 16 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         48    256 PM  74    1971  46      2
  MINIMUM         25   1208 AM  10    1917  32     -7
  AVERAGE         37                        39     -2

PRECIPITATION (IN)
  TODAY            0.00          1.19 1902   0.09  -0.09
  MONTH TO DATE    0.29                      1.68  -1.39
  SINCE DEC 1      0.29                      1.68  -1.39
  SINCE JAN 1     35.39                     38.37  -2.98

SNOWFALL (IN)
  TODAY            0.0           6.0  1973   0.0    0.0
  MONTH TO DATE    1.7                       1.0    0.7
  SINCE JUL 1      1.7                       1.5    0.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           28                                2
  MONTH TO DATE  379                                4
  SINCE DEC 1    379                                4
  SINCE JUL 1    928                             -142

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


WIND (MPH)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED    10.2




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    84
 LOWEST     38
 AVERAGE    61

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   46        64      1984
                                             1939
 MINIMUM TEMPERATURE (F)   32        10      1876


SUNRISE AND SUNSET
DECEMBER 16 2017......SUNRISE   720 AM EST   SUNSET   448 PM EST
DECEMBER 17 2017......SUNRISE   721 AM EST   SUNSET   448 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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