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
1225 AM EST TUE JAN 17 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 16 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         45    443 PM  65    1974  42      3       52
  MINIMUM         37    737 AM  -4    1964  24     13       36
  AVERAGE         41                        33      8       44

PRECIPITATION (IN)
  YESTERDAY        T             0.64 1991   0.08  -0.08     0.01
  MONTH TO DATE    1.60                      1.33   0.27     1.80
  SINCE DEC 1      3.96                      4.29  -0.33     5.56
  SINCE JAN 1      1.60                      1.33   0.27     1.80

SNOWFALL (IN)
  YESTERDAY       MM             2.3  1965   0.2   MM
  MONTH TO DATE    0.7                       3.2   -2.5
  SINCE JUL 1      0.7                       7.2   -6.5
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       24                        32     -8       21
  MONTH TO DATE  452                       512    -60      479
  SINCE DEC 1   1275                      1394   -119      982
  SINCE JUL 1   2002                      2310   -308     1732

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        2
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    14   HIGHEST GUST DIRECTION     S (180)
  AVERAGE WIND SPEED     4.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    70           600 AM
 LOWEST     50          1200 AM
 AVERAGE    60

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   42        70      1990
 MINIMUM TEMPERATURE (F)   24        -7      1982


SUNRISE AND SUNSET
JANUARY 17 2017.......SUNRISE   726 AM EST   SUNSET   514 PM EST
JANUARY 18 2017.......SUNRISE   726 AM EST   SUNSET   515 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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