Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 202128
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
528 PM EDT FRI OCT 20 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 20 2017...
VALID TODAY AS OF 0500 PM LOCAL TIME.

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)
 TODAY
  MAXIMUM         76    216 PM  83    2016  67      9       83
                                      1969
  MINIMUM         44    558 AM  20    1972  42      2       65
  AVERAGE         60                        54      6       74

PRECIPITATION (IN)
  TODAY            0.00          1.27 1976   0.10  -0.10      T
  MONTH TO DATE    1.48                      2.08  -0.60     0.43
  SINCE SEP 1      3.23                      6.00  -2.77     2.98
  SINCE JAN 1     36.23                     34.00   2.23    30.98

SNOWFALL (IN)
  TODAY            0.0           T    1974   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
  TODAY            5                        11     -6        0
  MONTH TO DATE   80                       161    -81       93
  SINCE SEP 1    120                       217    -97       99
  SINCE JUL 1    121                       219    -98       99

 COOLING
  TODAY            0                         0      0        9
  MONTH TO DATE   64                        16     48       33
  SINCE SEP 1    219                       157     62      288
  SINCE JAN 1   1280                      1173    107     1551
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     4.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.3


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           100 AM
 LOWEST     27           200 PM
 AVERAGE    64

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   67        86      1979
 MINIMUM TEMPERATURE (F)   42        22      1972


SUNRISE AND SUNSET
OCTOBER 20 2017.......SUNRISE   725 AM EDT   SUNSET   624 PM EDT
OCTOBER 21 2017.......SUNRISE   726 AM EDT   SUNSET   623 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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