Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 170536
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
136 AM EDT THU AUG 17 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 16 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    247 PM 100    1997  87      2       96
  MINIMUM         65    455 AM  46    1979  65      0       72
  AVERAGE         77                        76      1       84

PRECIPITATION (IN)
  YESTERDAY        T             1.45 2003   0.11  -0.11     0.00
  MONTH TO DATE    2.42                      1.91   0.51     0.21
  SINCE JUN 1     12.50                      9.56   2.94     9.58
  SINCE JAN 1     31.59                     26.38   5.21    27.25

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       12                        11      1       19
  MONTH TO DATE  140                       177    -37      248
  SINCE JUN 1    799                       777     22      960
  SINCE JAN 1    936                       869     67     1058
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     W (280)
  HIGHEST GUST SPEED    14   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     3.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     53           400 PM
 AVERAGE    77

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   87       101      1988
 MINIMUM TEMPERATURE (F)   64        44      1979


SUNRISE AND SUNSET
AUGUST 17 2017........SUNRISE   625 AM EDT   SUNSET   802 PM EDT
AUGUST 18 2017........SUNRISE   626 AM EDT   SUNSET   800 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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