Climatological Report (Daily)
Issued by NWS Sterling, VA

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991
CDUS41 KLWX 182132
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
431 PM EST THU JAN 18 2018


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 18 2018...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         46    359 PM  70    1990  42      4       57
  MINIMUM         16    158 AM  -1    1994  24     -8       41
  AVERAGE         31                        33     -2       49

PRECIPITATION (IN)
  TODAY            0.00          1.18 1980   0.08  -0.08     0.00
  MONTH TO DATE    1.51                      1.50   0.01     1.80
  SINCE DEC 1      2.28                      4.46  -2.18     4.16
  SINCE JAN 1      1.51                      1.50   0.01     1.80

SNOWFALL (IN)
  TODAY            0.0           4.2  1984   0.2   -0.2
  MONTH TO DATE    0.4                       3.7   -3.3
  SINCE JUL 1      5.0                       7.7   -2.7
  SNOW DEPTH       T

DEGREE DAYS
 HEATING
  TODAY           34                        32      2       16
  MONTH TO DATE  683                       576    107      487
  SINCE DEC 1   1606                      1458    148     1310
  SINCE JUL 1   2400                      2374     26     2037

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


WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    12.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    67           100 AM
 LOWEST     17           400 PM
 AVERAGE    42

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   42        65      1972
 MINIMUM TEMPERATURE (F)   24        -6      1994


SUNRISE AND SUNSET
JANUARY 18 2018.......SUNRISE   726 AM EST   SUNSET   515 PM EST
JANUARY 19 2018.......SUNRISE   725 AM EST   SUNSET   516 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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