Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 180526
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1226 AM EST THU JAN 18 2018


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 17 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         32   1203 AM  70    1990  42    -10       52
  MINIMUM         17   1159 PM  -7    1982  24     -7       40
  AVERAGE         25                        33     -8       46

PRECIPITATION (IN)
  YESTERDAY        0.02          1.14 1994   0.09  -0.07     0.20
  MONTH TO DATE    1.51                      1.42   0.09     1.80
  SINCE DEC 1      2.28                      4.38  -2.10     4.16
  SINCE JAN 1      1.51                      1.42   0.09     1.80

SNOWFALL (IN)
  YESTERDAY        0.3           4.2  1965   0.3    0.0
  MONTH TO DATE    0.4                       3.5   -3.1
  SINCE JUL 1      5.0                       7.5   -2.5
  SNOW DEPTH       T

DEGREE DAYS
 HEATING
  YESTERDAY       40                        32      8       19
  MONTH TO DATE  649                       544    105      471
  SINCE DEC 1   1572                      1426    146     1294
  SINCE JUL 1   2366                      2342     24     2021

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION    NW (330)
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION    NW (330)
  AVERAGE WIND SPEED    13.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    85           200 AM
 LOWEST     50           400 PM
 AVERAGE    68

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   42        70      1990
 MINIMUM TEMPERATURE (F)   24        -1      1994


SUNRISE AND SUNSET
JANUARY 18 2018.......SUNRISE   726 AM EST   SUNSET   515 PM EST
JANUARY 19 2018.......SUNRISE   725 AM EST   SUNSET   516 PM EST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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