Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 202136
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
535 PM EDT WED SEP 20 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 20 2017...
VALID TODAY AS OF 0500 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         87    309 PM  91    1965  78      9       81
  MINIMUM         61    627 AM  40    1979  55      6       68
  AVERAGE         74                        66      8       75

PRECIPITATION (IN)
  TODAY            0.00          0.87 1966   0.14  -0.14     0.00
  MONTH TO DATE    1.75                      2.61  -0.86     0.40
  SINCE SEP 1      1.75                      2.61  -0.86     0.40
  SINCE JAN 1     34.75                     30.61   4.14    28.40

SNOWFALL (IN)
  TODAY            0.0          MM      MM   0.0    0.0
  MONTH TO DATE    0.0                       0.0    0.0
  SINCE JUL 1      T                         0.0    0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY            0                         2     -2        0
  MONTH TO DATE   30                        18     12        0
  SINCE SEP 1     30                        18     12        0
  SINCE JUL 1     31                        20     11        0

 COOLING
  TODAY            9                         4      5       10
  MONTH TO DATE   80                       117    -37      223
  SINCE SEP 1     80                       117    -37      223
  SINCE JAN 1   1141                      1133      8     1486
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    NW (300)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED     6.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.3


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     37           400 PM
 AVERAGE    69

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   77        92      1998
                                             1965
 MINIMUM TEMPERATURE (F)   54        33      1962


SUNRISE AND SUNSET
SEPTEMBER 20 2017.....SUNRISE   656 AM EDT   SUNSET   710 PM EDT
SEPTEMBER 21 2017.....SUNRISE   657 AM EDT   SUNSET   708 PM EDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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