Climatological Report (Daily)
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000
CDUS46 KSEW 250847
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
147 AM PDT MON SEP 25 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 24 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         72    327 PM  89    1974  68      4       66
  MINIMUM         50    647 AM  38    1948  50      0       53
  AVERAGE         61                        59      2       60

PRECIPITATION (IN)
  YESTERDAY        0.00          0.99 1950   0.06  -0.06     0.00
  MONTH TO DATE    0.50                      1.11  -0.61     1.03
  SINCE OCT 1     49.32                     37.10  12.22    49.15
  SINCE JAN 1     28.92                     21.70   7.22    24.76

DEGREE DAYS
 HEATING
  YESTERDAY        4                         6     -2        5
  MONTH TO DATE   63                        89    -26       84
  SINCE SEP 1     63                        89    -26       84
  SINCE JUL 1     70                       174   -104      105

 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   W (290)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     W (290)
  AVERAGE WIND SPEED     3.0


SKY COVER
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    89           600 AM
 LOWEST     40           300 PM
 AVERAGE    65

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   68        85      1991
 MINIMUM TEMPERATURE (F)   50        36      1972


SUNRISE AND SUNSET
SEPTEMBER 25 2017.....SUNRISE   700 AM PDT   SUNSET   700 PM PDT
SEPTEMBER 26 2017.....SUNRISE   702 AM PDT   SUNSET   658 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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