Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 170525
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
125 AM EDT TUE OCT 17 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 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         70   1202 AM  85    1989  68      2       75
  MINIMUM         48   1122 PM  30    1986  44      4       46
  AVERAGE         59                        56      3       61

PRECIPITATION (IN)
  YESTERDAY        0.08          1.10 2002   0.10  -0.02     0.00
  MONTH TO DATE    1.48                      1.68  -0.20     0.40
  SINCE SEP 1      3.23                      5.60  -2.37     2.95
  SINCE JAN 1     36.23                     33.60   2.63    30.95

SNOWFALL (IN)
  YESTERDAY        0.0           T    1977   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        6                        10     -4        4
  MONTH TO DATE   38                       120    -82       93
  SINCE SEP 1     78                       176    -98       99
  SINCE JUL 1     79                       178    -99       99

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   64                        16     48        4
  SINCE SEP 1    219                       157     62      259
  SINCE JAN 1   1280                      1173    107     1522
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    12.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           300 AM
 LOWEST     34           300 PM
 AVERAGE    64

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   68        84      2016
 MINIMUM TEMPERATURE (F)   43        31      1982
                                             1981


SUNRISE AND SUNSET
OCTOBER 17 2017.......SUNRISE   722 AM EDT   SUNSET   628 PM EDT
OCTOBER 18 2017.......SUNRISE   723 AM EDT   SUNSET   627 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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