NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-07 · 2026-09-09 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-09 04:26:00 EDT · Product id iem:CDUS46-KSEW-090826:SEA:2026-09-08:final · IEM archive
Product id iem:CDUS46-KSEW-090826:SEA:2026-09-08:final · iem-afos · IEM archive
SHA-256 11f88da68a71c7857e1b8ab5bb7398648767bbcc5983afeff6b7f0514c8df4b1
Product text
CDUS46 KSEW 090826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT WED SEP 09 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 8 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 74 431 PM 85 1993 74 0 75
2011
MINIMUM 55 519 AM 43 1950 55 0 58
AVERAGE 65 64 1 67
PRECIPITATION (IN)
YESTERDAY 0.00 0.60 1979 0.05 -0.05 0.00
1994
MONTH TO DATE 0.35 0.35 -0.00 0.05
SINCE OCT 1 37.26 38.08 -0.82 28.96
SINCE JAN 1 20.48 22.14 -1.66 15.56
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 3.0 2.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 18 16 2 1
SINCE SEP 1 18 16 2 1
SINCE JUL 1 43 71 -28 25
COOLING
YESTERDAY 0 2 -2 2
MONTH TO DATE 0 16 -16 21
SINCE SEP 1 0 16 -16 21
SINCE JAN 1 265 249 16 315
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 500 AM
LOWEST 44 300 PM
AVERAGE 66
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 1963
MINIMUM TEMPERATURE (F) 55 40 1952
SUNRISE AND SUNSET
SEPTEMBER 9 2026.....SUNRISE 639 AM PDT SUNSET 733 PM PDT
SEPTEMBER 10 2026.....SUNRISE 640 AM PDT SUNSET 731 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS46-KSEW-090116:SEA:2026-09-08:interim · iem-afos · IEM archive
SHA-256 f0f796234d72003347965805fa5ca8acf28e240826185f22bd5831225fd0e7ba
Product text
CDUS46 KSEW 090116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT TUE SEP 08 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 8 2026...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 74 431 PM 85 1993 74 0 75
2011
MINIMUM 55 519 AM 43 1950 55 0 58
AVERAGE 65 64 1 67
PRECIPITATION (IN)
TODAY 0.00 0.60 1979 0.05 -0.05 0.00
1994
MONTH TO DATE 0.35 0.35 -0.00 0.05
SINCE OCT 1 37.26 38.08 -0.82 28.96
SINCE JAN 1 20.48 22.14 -1.66 15.56
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 3.0 2.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 2 -2 0
MONTH TO DATE 18 16 2 1
SINCE SEP 1 18 16 2 1
SINCE JUL 1 43 71 -28 25
COOLING
TODAY 0 2 -2 2
MONTH TO DATE 0 16 -16 21
SINCE SEP 1 0 16 -16 21
SINCE JAN 1 265 249 16 315
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION N (10)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 7.9
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 500 AM
LOWEST 44 300 PM
AVERAGE 66
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 1963
MINIMUM TEMPERATURE (F) 55 40 1952
SUNRISE AND SUNSET
SEPTEMBER 8 2026.....SUNRISE 638 AM PDT SUNSET 735 PM PDT
SEPTEMBER 9 2026.....SUNRISE 639 AM PDT SUNSET 733 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Settlement source: the final NWS Climatological Report (CLI) for station KSEA for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KSEA/2026-09-08 with links to the NWS product and the IEM archive. A CORRECTED re-issue published before the settlement time supersedes earlier issues.
The settlement value for a date is the latest final CLI issued for that date; a corrected re-issue supersedes earlier issues. Interim same-day products never settle. This is the same rule that fills values.nwsOfficial in /api/station/{icao}/daily.
Every issue is stored verbatim as received - nothing is edited or re-derived. Products are held from 2026-09-01 (backfilled from the IEM AFOS archive) and ingested live from api.weather.gov since 2026-11-10, polled every 30 minutes. A date with no final CLI 14 hours after local midnight is reported as not_issued rather than filled in.