NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-26 · 2026-10-28 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-28 04:39:00 EDT · Product id iem:CDUS46-KSEW-280839:SEA:2026-10-27:final · IEM archive
Product id iem:CDUS46-KSEW-280839:SEA:2026-10-27:final · iem-afos · IEM archive
SHA-256 e146c734ea39e70a2b64065cf1e24a5a25a25b77476f7c98abc50edf7e2de333
Product text
CDUS46 KSEW 280839
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
139 AM PDT WED OCT 28 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 27 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 57 219 PM 67 1968 57 0 54
MINIMUM 47 1159 PM 31 1970 45 2 41
AVERAGE 52 51 1 48
PRECIPITATION (IN)
YESTERDAY 0.19 1.23 1967 0.16 0.03 0.01
MONTH TO DATE 0.52 3.23 -2.71 2.81
SINCE OCT 1 0.52 3.23 -2.71 2.81
SINCE JAN 1 22.11 26.63 -4.52 19.08
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 13 14 -1 17
MONTH TO DATE 251 289 -38 290
SINCE SEP 1 384 391 -7 341
SINCE JUL 1 409 446 -37 365
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 10 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 10.9
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 400 AM
LOWEST 64 200 PM
AVERAGE 79
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 68 2017
MINIMUM TEMPERATURE (F) 44 29 1946
SUNRISE AND SUNSET
OCTOBER 28 2026.......SUNRISE 747 AM PDT SUNSET 558 PM PDT
OCTOBER 29 2026.......SUNRISE 749 AM PDT SUNSET 556 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-280117:SEA:2026-10-27:interim · iem-afos · IEM archive
SHA-256 6a28584c73baa14add5ed3457470f548a1db6b6399fb4af7c37b809d922d02e8
Product text
CDUS46 KSEW 280117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT TUE OCT 27 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 27 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 57 219 PM 67 1968 57 0 54
MINIMUM 49 724 AM 31 1970 45 4 41
AVERAGE 53 51 2 48
PRECIPITATION (IN)
TODAY T 1.23 1967 0.16 -0.16 0.01
MONTH TO DATE 0.33 3.23 -2.90 2.81
SINCE OCT 1 0.33 3.23 -2.90 2.81
SINCE JAN 1 21.92 26.63 -4.71 19.08
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 12 14 -2 17
MONTH TO DATE 250 289 -39 290
SINCE SEP 1 383 391 -8 341
SINCE JUL 1 408 446 -38 365
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 8 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 8.5
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 400 AM
LOWEST 64 200 PM
AVERAGE 79
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 68 2017
MINIMUM TEMPERATURE (F) 44 29 1946
SUNRISE AND SUNSET
OCTOBER 27 2026.......SUNRISE 746 AM PDT SUNSET 600 PM PDT
OCTOBER 28 2026.......SUNRISE 747 AM PDT SUNSET 558 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/2026-10-27 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.