Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 180523
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
123 AM EDT FRI AUG 18 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 17 2017...

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)
 YESTERDAY
  MAXIMUM         89    232 PM 101    1988  87      2       94
  MINIMUM         68    529 AM  44    1979  64      4       70
  AVERAGE         79                        76      3       82

PRECIPITATION (IN)
  YESTERDAY        T             3.32 1997   0.12  -0.12     0.66
  MONTH TO DATE    2.42                      2.03   0.39     0.87
  SINCE JUN 1     12.50                      9.68   2.82    10.24
  SINCE JAN 1     31.59                     26.50   5.09    27.91

SNOWFALL (IN)
  YESTERDAY        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
  YESTERDAY        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
  YESTERDAY       14                        11      3       17
  MONTH TO DATE  154                       188    -34      265
  SINCE JUN 1    813                       788     25      977
  SINCE JAN 1    950                       880     70     1075
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     S (160)
  AVERAGE WIND SPEED     5.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  THUNDERSTORM
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     68           100 PM
 AVERAGE    84

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   87        98      2009
 MINIMUM TEMPERATURE (F)   64        45      1981


SUNRISE AND SUNSET
AUGUST 18 2017........SUNRISE   626 AM EDT   SUNSET   800 PM EDT
AUGUST 19 2017........SUNRISE   627 AM EDT   SUNSET   759 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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