Climatological Report (Daily)
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000
CDUS46 KSEW 180834
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
133 AM PDT FRI AUG 18 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 17 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         75        MM  96    1977  76     -1       80
  MINIMUM         59        MM  45    1951  56      3       56
  AVERAGE         67                        66      1       68

PRECIPITATION (IN)
  YESTERDAY        0.00          0.93 1995   0.03  -0.03     0.00
  MONTH TO DATE    0.02                      0.40  -0.38     0.16
  SINCE OCT 1     48.82                     35.51  13.31    48.11
  SINCE JAN 1     28.42                     20.11   8.31    23.72

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    0                        17    -17        5
  SINCE JUN 1    105                       210   -105      107
  SINCE JUL 1      6                        66    -60       16

 COOLING
  YESTERDAY        2                         2      0        3
  MONTH TO DATE  111                        48     63       60
  SINCE JUN 1    241                       140    101      189
  SINCE JAN 1    260                       146    114      215
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION   W (250)
  HIGHEST WIND SPEED     9   HIGHEST WIND DIRECTION     N (10)
  HIGHEST GUST SPEED    MM   HIGHEST GUST DIRECTION    MM
  AVERAGE WIND SPEED     5.3


SKY COVER
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    87           500 AM
 LOWEST     46           500 PM
 AVERAGE    67

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        88      1991
 MINIMUM TEMPERATURE (F)   56        47      1951


SUNRISE AND SUNSET
AUGUST 18 2017........SUNRISE   610 AM PDT   SUNSET   815 PM PDT
AUGUST 19 2017........SUNRISE   611 AM PDT   SUNSET   813 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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