Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 260523
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
123 AM EDT TUE SEP 26 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 25 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         89    246 PM  93    2010  76     13       74
  MINIMUM         64    241 AM  33    1983  52     12       54
  AVERAGE         77                        64     13       64

PRECIPITATION (IN)
  YESTERDAY        0.00          2.67 1975   0.13  -0.13     0.00
  MONTH TO DATE    1.75                      3.26  -1.51     0.40
  SINCE SEP 1      1.75                      3.26  -1.51     0.40
  SINCE JAN 1     34.75                     31.26   3.49    28.40

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        0                         3     -3        1
  MONTH TO DATE   30                        33     -3        1
  SINCE SEP 1     30                        33     -3        1
  SINCE JUL 1     31                        35     -4        1

 COOLING
  YESTERDAY       12                         2     10        0
  MONTH TO DATE  124                       131     -7      252
  SINCE SEP 1    124                       131     -7      252
  SINCE JAN 1   1185                      1147     38     1515
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     E (100)
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED     4.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     50           200 PM
 AVERAGE    75

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   75        93      2007
 MINIMUM TEMPERATURE (F)   52        38      1983
                                             1964


SUNRISE AND SUNSET
SEPTEMBER 26 2017.....SUNRISE   701 AM EDT   SUNSET   700 PM EDT
SEPTEMBER 27 2017.....SUNRISE   702 AM EDT   SUNSET   658 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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