Climatological Report (Daily)
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918
CDUS46 KSEW 190832
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
132 AM PDT SAT AUG 19 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 18 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         73    419 PM  88    1991  76     -3       87
  MINIMUM         55    543 AM  47    1951  56     -1       60
  AVERAGE         64                        66     -2       74

PRECIPITATION (IN)
  YESTERDAY        0.00          1.63 1975   0.03  -0.03     0.00
  MONTH TO DATE    0.02                      0.43  -0.41     0.16
  SINCE OCT 1     48.82                     35.54  13.28    48.11
  SINCE JAN 1     28.42                     20.14   8.28    23.72

DEGREE DAYS
 HEATING
  YESTERDAY        1                         1      0        0
  MONTH TO DATE    1                        18    -17        5
  SINCE JUN 1    106                       211   -105      107
  SINCE JUL 1      7                        67    -60       16

 COOLING
  YESTERDAY        0                         2     -2        9
  MONTH TO DATE  111                        50     61       69
  SINCE JUN 1    241                       142     99      198
  SINCE JAN 1    260                       148    112      224
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION   W (280)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION    NE (30)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED     6.6


SKY COVER
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           300 AM
 LOWEST     53           500 PM
 AVERAGE    73

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        95      2016
 MINIMUM TEMPERATURE (F)   56        47      1947
                                             1945


SUNRISE AND SUNSET
AUGUST 19 2017........SUNRISE   611 AM PDT   SUNSET   813 PM PDT
AUGUST 20 2017........SUNRISE   613 AM PDT   SUNSET   811 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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