Climatological Report (Daily)
Issued by NWS Sterling, VA

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251
CDUS41 KLWX 190524
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
123 AM EDT SAT AUG 19 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 18 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         93    347 PM  98    2009  87      6       90
  MINIMUM         75    509 PM  45    1981  64     11       72
  AVERAGE         84                        76      8       81

PRECIPITATION (IN)
  YESTERDAY        0.69          1.39 2010   0.11   0.58      T
  MONTH TO DATE    3.11                      2.14   0.97     0.87
  SINCE JUN 1     13.19                      9.79   3.40    10.24
  SINCE JAN 1     32.28                     26.61   5.67    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       19                        11      8       16
  MONTH TO DATE  173                       199    -26      281
  SINCE JUN 1    832                       799     33      993
  SINCE JAN 1    969                       891     78     1091
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION    NW (300)
  AVERAGE WIND SPEED     7.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           300 AM
 LOWEST     56           300 PM
 AVERAGE    78

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   87        95      2002
 MINIMUM TEMPERATURE (F)   64        51      1998


SUNRISE AND SUNSET
AUGUST 19 2017........SUNRISE   627 AM EDT   SUNSET   759 PM EDT
AUGUST 20 2017........SUNRISE   628 AM EDT   SUNSET   757 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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