Climatological Report (Daily)
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000
CDUS46 KSEW 210845
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
145 AM PDT FRI JUL 21 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR JULY 20 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         74    427 PM 100    1994  77     -3       80
  MINIMUM         59    623 AM  50    1962  56      3       60
                                      1955
                                      1953
  AVERAGE         67                        66      1       70

PRECIPITATION (IN)
  YESTERDAY        0.00          0.60 2012   0.02  -0.02     0.00
  MONTH TO DATE    0.00                      0.51  -0.51     0.39
  SINCE OCT 1     48.80                     34.92  13.88    47.62
  SINCE JAN 1     28.40                     19.52   8.88    23.23

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    5                        38    -33       10
  SINCE JUN 1    104                       182    -78      101
  SINCE JUL 1      5                        38    -33       10

 COOLING
  YESTERDAY        2                         3     -1        5
  MONTH TO DATE   37                        40     -3       23
  SINCE JUN 1     80                        61     19       77
  SINCE JAN 1     99                        67     32      103
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   9   RESULTANT WIND DIRECTION  SW (210)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED    10.4


SKY COVER
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    84          1200 AM
 LOWEST     46           200 PM
 AVERAGE    65

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   77        97      2006
 MINIMUM TEMPERATURE (F)   56        48      1951


SUNRISE AND SUNSET
JULY 21 2017..........SUNRISE   534 AM PDT   SUNSET   856 PM PDT
JULY 22 2017..........SUNRISE   536 AM PDT   SUNSET   855 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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