Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 210526
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
126 AM EDT FRI JUL 21 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 20 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    454 PM 101    1980  88      5       86
  MINIMUM         72    529 AM  55    1974  66      6       67
  AVERAGE         83                        77      6       77

PRECIPITATION (IN)
  YESTERDAY        0.00          2.28 1970   0.11  -0.11     0.00
  MONTH TO DATE    5.55                      2.35   3.20     1.31
  SINCE JUN 1      6.83                      6.33   0.50     7.66
  SINCE JAN 1     25.92                     23.15   2.77    25.33

SNOWFALL (IN)
  YESTERDAY        0.0          MM      MM   0.0    0.0
  MONTH TO DATE    0.0                       0.0    0.0
  SINCE JUL 1      0.0                       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       18                        12      6       12
  MONTH TO DATE  283                       235     48      266
  SINCE JUN 1    539                       472     67      519
  SINCE JAN 1    676                       564    112      617
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     4.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           400 AM
 LOWEST     46           500 PM
 AVERAGE    73

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   88       101      1991
 MINIMUM TEMPERATURE (F)   66        48      1966


SUNRISE AND SUNSET
JULY 21 2017..........SUNRISE   601 AM EDT   SUNSET   831 PM EDT
JULY 22 2017..........SUNRISE   602 AM EDT   SUNSET   830 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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