NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-15 · 2026-10-17 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-17 04:26:00 EDT · Product id iem:CDUS46-KSEW-170826:SEA:2026-10-16:final · IEM archive
Product id iem:CDUS46-KSEW-170826:SEA:2026-10-16:final · iem-afos · IEM archive
SHA-256 82c46ac6148e4e3e8dcb425c1ca4c45ad7fc82ee735201d0f97eac03c109a112
Product text
CDUS46 KSEW 170826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT SAT OCT 17 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 16 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 77 327 PM 88 2022 60 17 58
MINIMUM 46 423 AM 32 1946 47 -1 42
AVERAGE 62 54 8 50
PRECIPITATION (IN)
YESTERDAY 0.00 0.94 1947 0.12 -0.12 T
MONTH TO DATE 0.06 1.62 -1.56 0.60
SINCE OCT 1 0.06 1.62 -1.56 0.60
SINCE JAN 1 21.65 25.02 -3.37 16.87
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 3 11 -8 15
MONTH TO DATE 116 145 -29 150
SINCE SEP 1 249 247 2 201
SINCE JUL 1 274 302 -28 225
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 5.1
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 600 AM
LOWEST 27 200 PM
AVERAGE 64
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 74 1989
MINIMUM TEMPERATURE (F) 47 34 1949
SUNRISE AND SUNSET
OCTOBER 17 2026.......SUNRISE 731 AM PDT SUNSET 617 PM PDT
OCTOBER 18 2026.......SUNRISE 732 AM PDT SUNSET 615 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-170116:SEA:2026-10-16:interim · iem-afos · IEM archive
SHA-256 dcdea1444f14bce00223aa74a613f33f1f4f92690482340bb5d09dca160bef64
Product text
CDUS46 KSEW 170116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT FRI OCT 16 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 16 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 77 327 PM 88 2022 60 17 58
MINIMUM 46 423 AM 32 1946 47 -1 42
AVERAGE 62 54 8 50
PRECIPITATION (IN)
TODAY 0.00 0.94 1947 0.12 -0.12 T
MONTH TO DATE 0.06 1.62 -1.56 0.60
SINCE OCT 1 0.06 1.62 -1.56 0.60
SINCE JAN 1 21.65 25.02 -3.37 16.87
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 3 11 -8 15
MONTH TO DATE 116 145 -29 150
SINCE SEP 1 249 247 2 201
SINCE JUL 1 274 302 -28 225
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION SW (230)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 3.5
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 600 AM
LOWEST 27 200 PM
AVERAGE 64
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 74 1989
MINIMUM TEMPERATURE (F) 47 34 1949
SUNRISE AND SUNSET
OCTOBER 16 2026.......SUNRISE 730 AM PDT SUNSET 619 PM PDT
OCTOBER 17 2026.......SUNRISE 731 AM PDT SUNSET 617 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/2026-10-16 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.