Climatological Report (Daily)
Issued by NWS Sterling, VA

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CDUS41 KLWX 180526
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1226 AM EST THU JAN 18 2018


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR JANUARY 17 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         37   1204 AM  74    1943  43     -6       53
  MINIMUM         20   1159 PM  -5    1982  28     -8       41
  AVERAGE         29                        36     -7       47

PRECIPITATION (IN)
  YESTERDAY        0.03          1.09 1994   0.09  -0.06     0.21
  MONTH TO DATE    0.67                      1.53  -0.86     1.82
  SINCE DEC 1      1.17                      4.58  -3.41     4.43
  SINCE JAN 1      0.67                      1.53  -0.86     1.82

SNOWFALL (IN)
  YESTERDAY        0.4           5.5  1935   0.2    0.2
  MONTH TO DATE    1.2                       2.6   -1.4
  SINCE JUL 1      3.1                       5.4   -2.3
  SNOW DEPTH       T

DEGREE DAYS
 HEATING
  YESTERDAY       36                        29      7       18
  MONTH TO DATE  598                       493    105      427
  SINCE DEC 1   1390                      1279    111     1137
  SINCE JUL 1   1939                      1974    -35     1624

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


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    30   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    15.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    85           400 AM
 LOWEST     46           300 PM
 AVERAGE    66

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


THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   43        69      1990
 MINIMUM TEMPERATURE (F)   28        -6      1893


SUNRISE AND SUNSET
JANUARY 18 2018.......SUNRISE   724 AM EST   SUNSET   514 PM EST
JANUARY 19 2018.......SUNRISE   723 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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