Climatological Report (Daily)
Issued by NWS Sterling, VA

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509
CDUS41 KLWX 220527
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
126 AM EDT TUE AUG 22 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 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         89    119 PM  96    1962  86      3       90
  MINIMUM         69    434 AM  47    1976  64      5       69
  AVERAGE         79                        75      4       80

PRECIPITATION (IN)
  YESTERDAY        0.00          1.43 2014   0.10  -0.10     0.07
  MONTH TO DATE    3.12                      2.47   0.65     0.94
  SINCE JUN 1     13.20                     10.12   3.08    10.31
  SINCE JAN 1     32.29                     26.94   5.35    27.98

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                        10      4       15
  MONTH TO DATE  211                       229    -18      322
  SINCE JUN 1    870                       829     41     1034
  SINCE JAN 1   1007                       921     86     1132
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     S (180)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     S (180)
  AVERAGE WIND SPEED     5.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     65           200 PM
 AVERAGE    83

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   86       101      1983
 MINIMUM TEMPERATURE (F)   64        51      1976
                                             1969


SUNRISE AND SUNSET
AUGUST 22 2017........SUNRISE   630 AM EDT   SUNSET   755 PM EDT
AUGUST 23 2017........SUNRISE   631 AM EDT   SUNSET   753 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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