Climatological Report (Daily)
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000
CDUS46 KSEW 210828
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
128 AM PDT MON AUG 21 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 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         77    433 PM  91    2016  76      1       91
  MINIMUM         56    357 AM  45    1945  56      0       62
  AVERAGE         67                        66      1       77

PRECIPITATION (IN)
  YESTERDAY        0.00          0.70 2008   0.03  -0.03     0.00
  MONTH TO DATE    0.02                      0.49  -0.47     0.16
  SINCE OCT 1     48.82                     35.60  13.22    48.11
  SINCE JAN 1     28.42                     20.20   8.22    23.72

DEGREE DAYS
 HEATING
  YESTERDAY        0                         1     -1        0
  MONTH TO DATE    1                        20    -19        5
  SINCE JUN 1    106                       213   -107      107
  SINCE JUL 1      7                        69    -62       16

 COOLING
  YESTERDAY        2                         2      0       12
  MONTH TO DATE  115                        54     61       98
  SINCE JUN 1    245                       146     99      227
  SINCE JAN 1    264                       152    112      253
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   6   RESULTANT WIND DIRECTION   N (10)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     N (2)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     N (3)
  AVERAGE WIND SPEED     8.2


SKY COVER
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    77           400 AM
 LOWEST     38           400 PM
 AVERAGE    58

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        88      1966
 MINIMUM TEMPERATURE (F)   56        44      1947


SUNRISE AND SUNSET
AUGUST 21 2017........SUNRISE   614 AM PDT   SUNSET   810 PM PDT
AUGUST 22 2017........SUNRISE   615 AM PDT   SUNSET   808 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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