Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 202154
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
554 PM EDT SUN AUG 20 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 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         86    355 PM 104    1983  87     -1       90
  MINIMUM         67    600 AM  47    1998  64      3       65
                                      1976
                                      1964
  AVERAGE         77                        75      2       78

PRECIPITATION (IN)
  TODAY            0.00          2.17 1963   0.12  -0.12     0.00
  MONTH TO DATE    3.12                      2.37   0.75     0.87
  SINCE JUN 1     13.20                     10.02   3.18    10.24
  SINCE JAN 1     32.29                     26.84   5.45    27.91

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                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1      6                        15     -9        3
  SINCE JUL 1      0                         0      0        0

 COOLING
  TODAY           12                        10      2       13
  MONTH TO DATE  197                       219    -22      307
  SINCE JUN 1    856                       819     37     1019
  SINCE JAN 1    993                       911     82     1117
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     N (20)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     N (20)
  AVERAGE WIND SPEED     5.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.1


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     48           200 PM
 AVERAGE    74

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   86        96      1962
 MINIMUM TEMPERATURE (F)   64        47      1976


SUNRISE AND SUNSET
AUGUST 20 2017........SUNRISE   628 AM EDT   SUNSET   757 PM EDT
AUGUST 21 2017........SUNRISE   629 AM EDT   SUNSET   756 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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