NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-17 · 2026-10-19 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-19 04:27:00 EDT · Product id iem:CDUS46-KSEW-190827:SEA:2026-10-18:final · IEM archive
Product id iem:CDUS46-KSEW-190827:SEA:2026-10-18:final · iem-afos · IEM archive
SHA-256 bfada162c454e2cb775a8589bf8325b4fb7840e41a76de0da0cf618d8ea8f540
Product text
CDUS46 KSEW 190827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT MON OCT 19 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 18 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 60 222 PM 71 2023 60 0 54
MINIMUM 43 657 AM 32 1949 47 -4 45
AVERAGE 52 53 -1 50
PRECIPITATION (IN)
YESTERDAY 0.00 2.23 1947 0.13 -0.13 0.37
MONTH TO DATE 0.08 1.88 -1.80 0.97
SINCE OCT 1 0.08 1.88 -1.80 0.97
SINCE JAN 1 21.67 25.28 -3.61 17.24
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 12 1 15
MONTH TO DATE 138 169 -31 175
SINCE SEP 1 271 271 0 226
SINCE JUL 1 296 326 -30 250
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 6 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 6.9
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 600 AM
LOWEST 53 300 PM
AVERAGE 77
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 59 72 2014
MINIMUM TEMPERATURE (F) 46 28 1949
SUNRISE AND SUNSET
OCTOBER 19 2026.......SUNRISE 734 AM PDT SUNSET 614 PM PDT
OCTOBER 20 2026.......SUNRISE 735 AM PDT SUNSET 612 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-190116:SEA:2026-10-18:interim · iem-afos · IEM archive
SHA-256 bf47a1d22687646d8b8a5f1d95c749e94bb4af22ac53898e59fbd77647aea111
Product text
CDUS46 KSEW 190116
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
616 PM PDT SUN OCT 18 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 18 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 60 222 PM 71 2023 60 0 54
MINIMUM 43 657 AM 32 1949 47 -4 45
AVERAGE 52 53 -1 50
PRECIPITATION (IN)
TODAY 0.00 2.23 1947 0.13 -0.13 0.37
MONTH TO DATE 0.08 1.88 -1.80 0.97
SINCE OCT 1 0.08 1.88 -1.80 0.97
SINCE JAN 1 21.67 25.28 -3.61 17.24
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 13 12 1 15
MONTH TO DATE 138 169 -31 175
SINCE SEP 1 271 271 0 226
SINCE JUL 1 296 326 -30 250
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 6 RESULTANT WIND DIRECTION NE (30)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 7.2
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 600 AM
LOWEST 53 300 PM
AVERAGE 77
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 59 72 2014
MINIMUM TEMPERATURE (F) 46 28 1949
SUNRISE AND SUNSET
OCTOBER 18 2026.......SUNRISE 732 AM PDT SUNSET 615 PM PDT
OCTOBER 19 2026.......SUNRISE 734 AM PDT SUNSET 614 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/2026-10-18 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.