Climatological Report (Daily)
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CDUS46 KSEW 210833
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
132 AM PDT SAT OCT 21 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         53   1234 PM  69    1987  58     -5       60
  MINIMUM         46    829 AM  29    1949  45      1       50
  AVERAGE         50                        52     -2       55

PRECIPITATION (IN)
  YESTERDAY        0.13          5.02 2003   0.12   0.01     1.19
  MONTH TO DATE    3.16                      1.85   1.31     7.38
  SINCE OCT 1      3.16                      1.85   1.31     7.38
  SINCE JAN 1     32.17                     23.94   8.23    32.16

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

DEGREE DAYS
 HEATING
  YESTERDAY       15                        13      2       10
  MONTH TO DATE  235                       215     20      192
  SINCE SEP 1    313                       347    -34      301
  SINCE JUL 1    320                       432   -112      322

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE SEP 1     75                        21     54        3
  SINCE JAN 1    392                       189    203      291
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED  13   RESULTANT WIND DIRECTION   S (200)
  HIGHEST WIND SPEED    23   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED    13.4


SKY COVER
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           100 AM
 LOWEST     71           400 PM
 AVERAGE    82

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   58        72      1965
 MINIMUM TEMPERATURE (F)   45        32      1949


SUNRISE AND SUNSET
OCTOBER 21 2017.......SUNRISE   737 AM PDT   SUNSET   610 PM PDT
OCTOBER 22 2017.......SUNRISE   739 AM PDT   SUNSET   608 PM PDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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