Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 220536
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
136 AM EDT SAT JUL 22 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 21 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    425 PM 101    1991  88      5       90
  MINIMUM         73    534 AM  48    1966  66      7       60
  AVERAGE         83                        77      6       75

PRECIPITATION (IN)
  YESTERDAY        0.00          1.15 1973   0.11  -0.11     0.00
  MONTH TO DATE    5.55                      2.46   3.09     1.31
  SINCE JUN 1      6.83                      6.44   0.39     7.66
  SINCE JAN 1     25.92                     23.26   2.66    25.33

SNOWFALL (IN)
  YESTERDAY        0.0          MM      MM   0.0    0.0
  MONTH TO DATE    T                         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       18                        12      6       10
  MONTH TO DATE  301                       247     54      276
  SINCE JUN 1    557                       484     73      529
  SINCE JAN 1    694                       576    118      627
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     4.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    87           300 AM
 LOWEST     49           100 PM
 AVERAGE    68

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   88       105      2011
 MINIMUM TEMPERATURE (F)   66        50      1974


SUNRISE AND SUNSET
JULY 22 2017..........SUNRISE   602 AM EDT   SUNSET   830 PM EDT
JULY 23 2017..........SUNRISE   603 AM EDT   SUNSET   829 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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