Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 202128
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
528 PM EDT FRI OCT 20 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR OCTOBER 20 2017...
VALID TODAY AS OF 0500 PM LOCAL TIME.

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


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE
                VALUE   (LST)  VALUE       VALUE  FROM
                                                  NORMAL
...............................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         77    311 PM  86    1969  67     10
  MINIMUM         55    457 AM  31    1972  49      6
  AVERAGE         66                        58      8

PRECIPITATION (IN)
  TODAY            0.00          2.97 1910   0.10  -0.10
  MONTH TO DATE    0.83                      2.19  -1.36
  SINCE SEP 1      2.26                      5.91  -3.65
  SINCE JAN 1     31.91                     32.31  -0.40

SNOWFALL (IN)
  TODAY            0.0           1.4  1940   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
  TODAY            0                               -8
  MONTH TO DATE   31                              -73
  SINCE SEP 1     37                              -91
  SINCE JUL 1     37                              -91

 COOLING
  TODAY            1                                0
  MONTH TO DATE   85                               53
  SINCE SEP 1    326                               92
  SINCE JAN 1   1817                              272
...............................................................


WIND (MPH)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION    NW (330)
  AVERAGE WIND SPEED     6.4




RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93
 LOWEST     33
 AVERAGE    63

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   67        85      1947
 MINIMUM TEMPERATURE (F)   49        30      1974
                                             1952


SUNRISE AND SUNSET
OCTOBER 20 2017.......SUNRISE   723 AM EDT   SUNSET   622 PM EDT
OCTOBER 21 2017.......SUNRISE   724 AM EDT   SUNSET   621 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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