National Weather Service - Climate Data

These data are preliminary and have not undergone final quality control by the National Climatic Data Center (NCDC). Therefore, these data are subject to revision. Final and certified climate data can be accessed at the NCDC - http://www.ncdc.noaa.gov.

Climatological Report (Daily)


000
CDUS46 KSEW 210124
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
623 PM PDT TUE AUG 20 2019


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 20 2019...
VALID TODAY AS OF 0500 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2019


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         82    311 PM  91    2016  76      6       81
  MINIMUM         56    339 AM  45    1945  56      0       57
  AVERAGE         69                        66      3       69

PRECIPITATION (IN)
  TODAY            0.00          0.70 2008   0.03  -0.03     0.00
  MONTH TO DATE    0.75                      0.49   0.26     0.08
  SINCE OCT 1     32.05                     35.60  -3.55    38.15
  SINCE JAN 1     16.77                     20.20  -3.43    19.29

SNOWFALL (IN)
  TODAY            0.0          MM      MM                   0.0
  MONTH TO DATE    0.0                                       0.0
  SINCE OCT 1     21.0                                       4.0
  SINCE JUL 1      0.0                                       0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  TODAY            0                         1     -1        0
  MONTH TO DATE    0                        20    -20        2
  SINCE JUN 1     84                       213   -129      113
  SINCE JUL 1     11                        69    -58       11

 COOLING
  TODAY            4                         2      2        4
  MONTH TO DATE   95                        54     41      107
  SINCE JUN 1    228                       146     82      336
  SINCE JAN 1    249                       152     97      353
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION  SE (120)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION    SW (210)
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED     5.4


SKY COVER
  AVERAGE SKY COVER 0.4


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    78           600 AM
 LOWEST     42           300 PM
 AVERAGE    60

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


THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        91      2018
 MINIMUM TEMPERATURE (F)   56        44      1947


SUNRISE AND SUNSET
AUGUST 20 2019........SUNRISE   612 AM PDT   SUNSET   812 PM PDT
AUGUST 21 2019........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.





The U.S. Naval Observatory (USNO) computes astronomical data. Therefore, the NWS does not record, certify, or authenticate astronomical data. Computed times of sunrise, sunset, moonrise, moonset; and twilight, moon phases and other astronomical data are available from USNO's Astronomical Applications Department (http://www.usno.navy.mil). See http://www.usno.navy.mil/USNO/astronomical-applications/astronomical-information-center/litigation for information on using these data for legal purposes.