Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 200534
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
134 AM EDT SUN AUG 20 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 19 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         88    420 PM  95    2002  87      1       89
  MINIMUM         66   1135 PM  51    1998  64      2       67
  AVERAGE         77                        75      2       78

PRECIPITATION (IN)
  YESTERDAY        0.01          1.54 1967   0.11  -0.10     0.00
  MONTH TO DATE    3.12                      2.25   0.87     0.87
  SINCE JUN 1     13.20                      9.90   3.30    10.24
  SINCE JAN 1     32.29                     26.72   5.57    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       12                        10      2       13
  MONTH TO DATE  185                       209    -24      294
  SINCE JUN 1    844                       809     35     1006
  SINCE JAN 1    981                       901     80     1104
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED     5.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     46           200 PM
 AVERAGE    73

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   87       104      1983
 MINIMUM TEMPERATURE (F)   64        47      1998
                                             1976
                                             1964


SUNRISE AND SUNSET
AUGUST 20 2017........SUNRISE   628 AM EDT   SUNSET   757 PM EDT
AUGUST 21 2017........SUNRISE   629 AM EDT   SUNSET   756 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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