NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-19 · 2026-10-21 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-21 04:26:00 EDT · Product id iem:CDUS46-KSEW-210826:SEA:2026-10-20:final · IEM archive
Product id iem:CDUS46-KSEW-210826:SEA:2026-10-20:final · iem-afos · IEM archive
SHA-256 eef18bc7c4054c7d2accc5ad944f9034c496497aef04d3d137303967200195e8
Product text
CDUS46 KSEW 210826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT WED OCT 21 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 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 62 329 PM 69 1987 59 3 58
MINIMUM 46 310 AM 29 1949 46 0 48
AVERAGE 54 52 2 53
PRECIPITATION (IN)
YESTERDAY 0.00 5.02 2003 0.14 -0.14 0.03
MONTH TO DATE 0.08 2.15 -2.07 1.06
SINCE OCT 1 0.08 2.15 -2.07 1.06
SINCE JAN 1 21.67 25.55 -3.88 17.33
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 11 13 -2 12
MONTH TO DATE 160 194 -34 197
SINCE SEP 1 293 296 -3 248
SINCE JUL 1 318 351 -33 272
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 9 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 8.9
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 400 AM
LOWEST 53 300 PM
AVERAGE 73
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 59 72 1965
MINIMUM TEMPERATURE (F) 46 32 1949
SUNRISE AND SUNSET
OCTOBER 21 2026.......SUNRISE 737 AM PDT SUNSET 610 PM PDT
OCTOBER 22 2026.......SUNRISE 738 AM PDT SUNSET 608 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-210117:SEA:2026-10-20:interim · iem-afos · IEM archive
SHA-256 3c2b0c788b475a179d16e657268cf2ba66f7091f4045da8735e26fd0127ecbc8
Product text
CDUS46 KSEW 210117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT TUE OCT 20 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 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 62 329 PM 69 1987 59 3 58
MINIMUM 46 310 AM 29 1949 46 0 48
AVERAGE 54 52 2 53
PRECIPITATION (IN)
TODAY 0.00 5.02 2003 0.14 -0.14 0.03
MONTH TO DATE 0.08 2.15 -2.07 1.06
SINCE OCT 1 0.08 2.15 -2.07 1.06
SINCE JAN 1 21.67 25.55 -3.88 17.33
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 11 13 -2 12
MONTH TO DATE 160 194 -34 197
SINCE SEP 1 293 296 -3 248
SINCE JUL 1 318 351 -33 272
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 10 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 10.0
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 400 AM
LOWEST 53 300 PM
AVERAGE 73
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 59 72 1965
MINIMUM TEMPERATURE (F) 46 32 1949
SUNRISE AND SUNSET
OCTOBER 20 2026.......SUNRISE 735 AM PDT SUNSET 612 PM PDT
OCTOBER 21 2026.......SUNRISE 737 AM PDT SUNSET 610 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/2026-10-20 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.