Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 202130
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
430 PM EST SAT JAN 20 2018


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 20 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         61    334 PM  63    2006  42     19       49
  MINIMUM         20    646 AM  -7    1985  24     -4       32
  AVERAGE         41                        33      8       41

PRECIPITATION (IN)
  TODAY            0.00          1.01 1979   0.09  -0.09     0.03
  MONTH TO DATE    1.51                      1.68  -0.17     1.83
  SINCE DEC 1      2.28                      4.64  -2.36     4.19
  SINCE JAN 1      1.51                      1.68  -0.17     1.83

SNOWFALL (IN)
  TODAY            0.0           4.6  2000   0.3   -0.3
  MONTH TO DATE    0.4                       4.3   -3.9
  SINCE JUL 1      5.0                       8.3   -3.3
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY           24                        32     -8       24
  MONTH TO DATE  736                       640     96      534
  SINCE DEC 1   1659                      1522    137     1357
  SINCE JUL 1   2453                      2438     15     2084

 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    14   HIGHEST WIND DIRECTION    SW (240)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     W (260)
  AVERAGE WIND SPEED     3.7


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    84           600 AM
 LOWEST     31          1100 AM
 AVERAGE    58

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   43        62      2006
 MINIMUM TEMPERATURE (F)   24       -16      1984


SUNRISE AND SUNSET
JANUARY 20 2018.......SUNRISE   725 AM EST   SUNSET   517 PM EST
JANUARY 21 2018.......SUNRISE   724 AM EST   SUNSET   518 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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