Climatological Report (Daily)
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000
CDUS46 KSEW 220857
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
156 AM PDT FRI SEP 22 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 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         64    325 PM  88    1974  69     -5       68
                                      1952
  MINIMUM         50    632 AM  39    1960  51     -1       52
                                      1955
  AVERAGE         57                        60     -3       60

PRECIPITATION (IN)
  YESTERDAY        0.02          0.94 1981   0.05  -0.03     0.00
  MONTH TO DATE    0.50                      0.94  -0.44     1.02
  SINCE OCT 1     49.32                     36.93  12.39    49.14
  SINCE JAN 1     28.92                     21.53   7.39    24.75

DEGREE DAYS
 HEATING
  YESTERDAY        8                         5      3        5
  MONTH TO DATE   50                        71    -21       64
  SINCE SEP 1     50                        71    -21       64
  SINCE JUL 1     57                       156    -99       85

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   67                        19     48        1
  SINCE SEP 1     67                        19     48        1
  SINCE JAN 1    384                       187    197      289
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   2   RESULTANT WIND DIRECTION  SE (150)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION    NE (40)
  HIGHEST GUST SPEED    14   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED     4.5


SKY COVER
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96          1000 AM
 LOWEST     52           400 PM
 AVERAGE    74

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   69        92      1990
 MINIMUM TEMPERATURE (F)   51        37      1955


SUNRISE AND SUNSET
SEPTEMBER 22 2017.....SUNRISE   656 AM PDT   SUNSET   706 PM PDT
SEPTEMBER 23 2017.....SUNRISE   658 AM PDT   SUNSET   704 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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