Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 200527
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
126 AM EDT WED SEP 20 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 19 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         82    359 PM  93    1978  78      4       76
                                      1977
  MINIMUM         65   1159 PM  36    1984  55     10       69
  AVERAGE         74                        67      7       73

PRECIPITATION (IN)
  YESTERDAY        0.00          1.26 2000   0.15  -0.15     0.23
  MONTH TO DATE    1.75                      2.47  -0.72     0.40
  SINCE SEP 1      1.75                      2.47  -0.72     0.40
  SINCE JAN 1     34.75                     30.47   4.28    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                         2     -2        0
  MONTH TO DATE   30                        16     14        0
  SINCE SEP 1     30                        16     14        0
  SINCE JUL 1     31                        18     13        0

 COOLING
  YESTERDAY        9                         4      5        8
  MONTH TO DATE   71                       113    -42      213
  SINCE SEP 1     71                       113    -42      213
  SINCE JAN 1   1132                      1129      3     1476
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION     N (360)
  AVERAGE WIND SPEED     8.4


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           100 AM
 LOWEST     55           400 PM
 AVERAGE    78

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   78        91      1965
 MINIMUM TEMPERATURE (F)   55        40      1979


SUNRISE AND SUNSET
SEPTEMBER 20 2017.....SUNRISE   656 AM EDT   SUNSET   710 PM EDT
SEPTEMBER 21 2017.....SUNRISE   657 AM EDT   SUNSET   708 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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