Climatological Report (Daily)
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342
CDUS46 KSEW 240838
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
138 AM PDT SUN SEP 24 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 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         68    447 PM  84    1947  68      0       63
  MINIMUM         54    538 AM  40    1948  51      3       53
  AVERAGE         61                        60      1       58

PRECIPITATION (IN)
  YESTERDAY        0.00          0.72 2014   0.05  -0.05     0.01
  MONTH TO DATE    0.50                      1.05  -0.55     1.03
  SINCE OCT 1     49.32                     37.04  12.28    49.15
  SINCE JAN 1     28.92                     21.64   7.28    24.76

DEGREE DAYS
 HEATING
  YESTERDAY        4                         6     -2        7
  MONTH TO DATE   59                        83    -24       79
  SINCE SEP 1     59                        83    -24       79
  SINCE JUL 1     66                       168   -102      100

 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  SW (220)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED     5.2


SKY COVER
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    86          1200 AM
 LOWEST     52           500 PM
 AVERAGE    69

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   68        89      1974
 MINIMUM TEMPERATURE (F)   50        38      1948


SUNRISE AND SUNSET
SEPTEMBER 24 2017.....SUNRISE   659 AM PDT   SUNSET   702 PM PDT
SEPTEMBER 25 2017.....SUNRISE   700 AM PDT   SUNSET   700 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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