Climatological Report (Daily)
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CDUS46 KSEW 200838
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
138 AM PDT THU JUL 20 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR JULY 19 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         78    434 PM  95    2015  77      1       77
                                      1988
  MINIMUM         53    418 AM  48    1962  56     -3       60
  AVERAGE         66                        66      0       69

PRECIPITATION (IN)
  YESTERDAY        0.00          0.45 1993   0.02  -0.02     0.00
  MONTH TO DATE    0.00                      0.49  -0.49     0.39
  SINCE OCT 1     48.80                     34.90  13.90    47.62
  SINCE JAN 1     28.40                     19.50   8.90    23.23

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    5                        37    -32       10
  SINCE JUN 1    104                       181    -77      101
  SINCE JUL 1      5                        37    -32       10

 COOLING
  YESTERDAY        1                         3     -2        4
  MONTH TO DATE   35                        37     -2       18
  SINCE JUN 1     78                        58     20       72
  SINCE JAN 1     97                        64     33       98
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION  SW (220)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    SW (210)
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION    SW (220)
  AVERAGE WIND SPEED     6.1


SKY COVER
  AVERAGE SKY COVER 0.3


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           500 AM
 LOWEST     38           300 PM
 AVERAGE    61

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   77       100      1994
 MINIMUM TEMPERATURE (F)   56        50      1962
                                             1955
                                             1953


SUNRISE AND SUNSET
JULY 20 2017..........SUNRISE   533 AM PDT   SUNSET   857 PM PDT
JULY 21 2017..........SUNRISE   534 AM PDT   SUNSET   856 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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