Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 150525
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1223 AM EST FRI DEC 15 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 14 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         44    959 AM  70    1931  47     -3       49
                                      1929
                                      1881
  MINIMUM         31   1159 PM   6    1904  33     -2       37
  AVERAGE         38                        40     -2       43

PRECIPITATION (IN)
  YESTERDAY        0.00          1.89 1879   0.10  -0.10     0.00
  MONTH TO DATE    0.28                      1.49  -1.21     1.56
  SINCE DEC 1      0.28                      1.49  -1.21     1.56
  SINCE JAN 1     35.38                     38.18  -2.80    30.65

SNOWFALL (IN)
  YESTERDAY        0.0           3.6  2003   0.1   -0.1
  MONTH TO DATE    2.0                       0.9    1.1
  SINCE JUL 1      2.0                       1.4    0.6
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       27                        25      2       22
  MONTH TO DATE  314                       324    -10      295
  SINCE DEC 1    314                       324    -10      295
  SINCE JUL 1    863                      1019   -156      782

 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    26   HIGHEST WIND DIRECTION    NW (330)
  HIGHEST GUST SPEED    34   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    12.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    52           400 AM
 LOWEST     34           100 PM
 AVERAGE    43

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   47        71      1971
 MINIMUM TEMPERATURE (F)   33         6      1904


SUNRISE AND SUNSET
DECEMBER 15 2017......SUNRISE   720 AM EST   SUNSET   447 PM EST
DECEMBER 16 2017......SUNRISE   720 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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