Climatological Report (Daily)
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000
CDUS46 KSEW 230926
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
226 AM PDT SAT SEP 23 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 22 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    317 PM  92    1990  69     -1       65
  MINIMUM         51    736 AM  37    1955  51      0       49
  AVERAGE         60                        60      0       57

PRECIPITATION (IN)
  YESTERDAY        0.00          1.65 1978   0.06  -0.06     0.00
  MONTH TO DATE    0.50                      1.00  -0.50     1.02
  SINCE OCT 1     49.32                     36.99  12.33    49.14
  SINCE JAN 1     28.92                     21.59   7.33    24.75

DEGREE DAYS
 HEATING
  YESTERDAY        5                         6     -1        8
  MONTH TO DATE   55                        77    -22       72
  SINCE SEP 1     55                        77    -22       72
  SINCE JUL 1     62                       162   -100       93

 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   S (200)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION    SW (240)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED     4.4


SKY COVER
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    89           300 AM
 LOWEST     48           300 PM
 AVERAGE    69

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   68        84      1947
 MINIMUM TEMPERATURE (F)   51        40      1948


SUNRISE AND SUNSET
SEPTEMBER 23 2017.....SUNRISE   658 AM PDT   SUNSET   704 PM PDT
SEPTEMBER 24 2017.....SUNRISE   659 AM PDT   SUNSET   702 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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