Climatological Report (Daily)
Issued by NWS Sterling, VA

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903
CDUS41 KLWX 210525
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
125 AM EDT THU SEP 21 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR SEPTEMBER 20 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         88    322 PM  94    1895  78     10       80
  MINIMUM         70    635 AM  41    1916  61      9       71
  AVERAGE         79                        69     10       76

PRECIPITATION (IN)
  YESTERDAY        0.00          1.43 1938   0.13  -0.13     0.00
  MONTH TO DATE    1.43                      2.42  -0.99     0.51
  SINCE SEP 1      1.43                      2.42  -0.99     0.51
  SINCE JAN 1     31.08                     28.82   2.26    25.44

SNOWFALL (IN)
  YESTERDAY        0.0          MM      MM   0.0    0.0
  MONTH TO DATE    0.0                       0.0    0.0
  SINCE JUL 1      0.0                       0.0    0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    5                         5      0        0
  SINCE SEP 1      5                         5      0        0
  SINCE JUL 1      5                         5      0        0

 COOLING
  YESTERDAY       14                         5      9       11
  MONTH TO DATE  132                       164    -32      276
  SINCE SEP 1    132                       164    -32      276
  SINCE JAN 1   1623                      1475    148     1862
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED     7.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    87          1000 PM
 LOWEST     43           200 PM
 AVERAGE    65

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   78        96      1895
 MINIMUM TEMPERATURE (F)   61        41      1956


SUNRISE AND SUNSET
SEPTEMBER 21 2017.....SUNRISE   655 AM EDT   SUNSET   706 PM EDT
SEPTEMBER 22 2017.....SUNRISE   656 AM EDT   SUNSET   705 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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