Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 110525
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1225 AM EST MON DEC 11 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 10 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         41    401 PM  67    1966  48     -7       39
                                      1939
  MINIMUM         30    301 AM   4    1876  34     -4       26
  AVERAGE         36                        41     -5       33

PRECIPITATION (IN)
  YESTERDAY        0.00          2.23 1878   0.11  -0.11     0.00
  MONTH TO DATE    0.28                      1.08  -0.80     1.40
  SINCE DEC 1      0.28                      1.08  -0.80     1.40
  SINCE JAN 1     35.38                     37.77  -2.39    30.49

SNOWFALL (IN)
  YESTERDAY        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
  YESTERDAY       29                        24      5       32
  MONTH TO DATE  201                       225    -24      207
  SINCE DEC 1    201                       225    -24      207
  SINCE JUL 1    750                       920   -170      694

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1826                      1549    277     1994
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     W (270)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     W (280)
  AVERAGE WIND SPEED     7.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           100 AM
 LOWEST     45           400 PM
 AVERAGE    69

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


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


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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