NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-29 · 2026-10-31 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-31 04:27:00 EDT · Product id iem:CDUS46-KSEW-310827:SEA:2026-10-30:final · IEM archive
Product id iem:CDUS46-KSEW-310827:SEA:2026-10-30:final · iem-afos · IEM archive
SHA-256 f95b4e35740bccee52ba152546e7d18ef2075a299b786ba9d2325e389e6fab07
Product text
CDUS46 KSEW 310827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT SAT OCT 31 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 30 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 49 352 PM 66 1967 56 -7 52
MINIMUM 42 1159 PM 30 1991 44 -2 42
AVERAGE 46 50 -4 47
PRECIPITATION (IN)
YESTERDAY 0.54 1.36 2012 0.18 0.36 0.00
MONTH TO DATE 1.29 3.74 -2.45 3.09
SINCE OCT 1 1.29 3.74 -2.45 3.09
SINCE JAN 1 22.88 27.14 -4.26 19.36
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 19 15 4 18
MONTH TO DATE 302 334 -32 339
SINCE SEP 1 435 436 -1 390
SINCE JUL 1 460 491 -31 414
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 NE (30)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 5.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 900 AM
LOWEST 82 800 PM
AVERAGE 89
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 71 1949
MINIMUM TEMPERATURE (F) 44 30 2003
2006
SUNRISE AND SUNSET
OCTOBER 31 2026.......SUNRISE 752 AM PDT SUNSET 553 PM PDT
NOVEMBER 1 2026......SUNRISE 653 AM PST SUNSET 452 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$Product id iem:CDUS46-KSEW-310117:SEA:2026-10-30:interim · iem-afos · IEM archive
SHA-256 da9917fe3f12e72a6e83eb95028b2c2622b9c2bbb791b33646acc626a3a634da
Product text
CDUS46 KSEW 310117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT FRI OCT 30 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 30 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 49 352 PM 66 1967 56 -7 52
MINIMUM 43 416 AM 30 1991 44 -1 42
AVERAGE 46 50 -4 47
PRECIPITATION (IN)
TODAY 0.35 1.36 2012 0.18 0.17 0.00
MONTH TO DATE 1.10 3.74 -2.64 3.09
SINCE OCT 1 1.10 3.74 -2.64 3.09
SINCE JAN 1 22.69 27.14 -4.45 19.36
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 19 15 4 18
MONTH TO DATE 302 334 -32 339
SINCE SEP 1 435 436 -1 390
SINCE JUL 1 460 491 -31 414
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 4 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 6.0
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 900 AM
LOWEST 86 700 AM
AVERAGE 91
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 71 1949
MINIMUM TEMPERATURE (F) 44 30 2003
2006
SUNRISE AND SUNSET
OCTOBER 30 2026.......SUNRISE 750 AM PDT SUNSET 555 PM PDT
OCTOBER 31 2026.......SUNRISE 752 AM PDT SUNSET 553 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/2026-10-30 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.