Climatological Report (Daily)
Issued by NWS Sterling, VA

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741
CDUS41 KLWX 190522
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
122 AM EDT THU OCT 19 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 18 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    329 PM  85    2016  68      2       85
  MINIMUM         36    641 AM  27    1982  43     -7       56
                                      1976
  AVERAGE         53                        55     -2       71

PRECIPITATION (IN)
  YESTERDAY        0.00          2.09 1996   0.10  -0.10     0.00
  MONTH TO DATE    1.48                      1.88  -0.40     0.40
  SINCE SEP 1      3.23                      5.80  -2.57     2.95
  SINCE JAN 1     36.23                     33.80   2.43    30.95

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       12                        10      2        0
  MONTH TO DATE   65                       140    -75       93
  SINCE SEP 1    105                       196    -91       99
  SINCE JUL 1    106                       198    -92       99

 COOLING
  YESTERDAY        0                         0      0        6
  MONTH TO DATE   64                        16     48       13
  SINCE SEP 1    219                       157     62      268
  SINCE JAN 1   1280                      1173    107     1531
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED     2.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.1


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           300 AM
 LOWEST     37           100 PM
 AVERAGE    69

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   67        87      2016
 MINIMUM TEMPERATURE (F)   43        25      1976


SUNRISE AND SUNSET
OCTOBER 19 2017.......SUNRISE   724 AM EDT   SUNSET   625 PM EDT
OCTOBER 20 2017.......SUNRISE   725 AM EDT   SUNSET   624 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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