Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 102131
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
431 PM EST SUN DEC 10 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 10 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         41    359 PM  67    1966  48     -7
                                      1939
  MINIMUM         30    301 AM   4    1876  34     -4
  AVERAGE         36                        41     -5

PRECIPITATION (IN)
  TODAY            0.00          2.23 1878   0.11  -0.11
  MONTH TO DATE    0.28                      1.08  -0.80
  SINCE DEC 1      0.28                      1.08  -0.80
  SINCE JAN 1     35.38                     37.77  -2.39

SNOWFALL (IN)
  TODAY            0.0           7.0  1904   0.1   -0.1
  MONTH TO DATE    2.0                       0.6    1.4
  SINCE JUL 1      2.0                       1.1    0.9
  SNOW DEPTH       2

DEGREE DAYS
 HEATING
  TODAY           29                                5
  MONTH TO DATE  201                              -24
  SINCE DEC 1    201                              -24
  SINCE JUL 1    750                             -170

 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     W (270)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     W (280)
  AVERAGE WIND SPEED     6.8




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92
 LOWEST     45
 AVERAGE    69

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   48        68      1979
                                             1971
                                             1897
 MINIMUM TEMPERATURE (F)   34        12      1917
                                             1904
                                             1880


SUNRISE AND SUNSET
DECEMBER 10 2017......SUNRISE   716 AM EST   SUNSET   446 PM EST
DECEMBER 11 2017......SUNRISE   717 AM EST   SUNSET   446 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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