NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-25 · 2026-09-27 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-27 04:26:00 EDT · Product id iem:CDUS46-KSEW-270826:SEA:2026-09-26:final · IEM archive
Product id iem:CDUS46-KSEW-270826:SEA:2026-09-26:final · iem-afos · IEM archive
SHA-256 29d4097d2e61b753dc9d55feeeb7b795e90d5b79f5135fdb207cf9e193f7688d
Product text
CDUS46 KSEW 270826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT SUN SEP 27 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 26 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 64 253 PM 82 2022 68 -4 70
MINIMUM 47 608 AM 39 1972 52 -5 50
AVERAGE 56 60 -4 60
PRECIPITATION (IN)
YESTERDAY 0.00 1.51 1948 0.07 -0.07 0.00
MONTH TO DATE 1.45 1.32 0.13 0.49
SINCE OCT 1 38.36 39.05 -0.69 29.40
SINCE JAN 1 21.58 23.11 -1.53 16.00
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 3.0 2.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 9 5 4 5
MONTH TO DATE 100 79 21 38
SINCE SEP 1 100 79 21 38
SINCE JUL 1 125 134 -9 62
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION N (20)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 7.4
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 400 AM
LOWEST 44 400 PM
AVERAGE 67
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 89 1967
MINIMUM TEMPERATURE (F) 51 35 1972
SUNRISE AND SUNSET
SEPTEMBER 27 2026.....SUNRISE 703 AM PDT SUNSET 656 PM PDT
SEPTEMBER 28 2026.....SUNRISE 704 AM PDT SUNSET 654 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-270118:SEA:2026-09-26:interim · iem-afos · IEM archive
SHA-256 231a94389a17c2649327799c0726cd8ffbb1238bc403bb8e2e390518f4f84b9e
Product text
CDUS46 KSEW 270118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT SAT SEP 26 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 26 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 64 253 PM 82 2022 68 -4 70
MINIMUM 47 608 AM 39 1972 52 -5 50
AVERAGE 56 60 -4 60
PRECIPITATION (IN)
TODAY 0.00 1.51 1948 0.07 -0.07 0.00
MONTH TO DATE 1.45 1.32 0.13 0.49
SINCE OCT 1 38.36 39.05 -0.69 29.40
SINCE JAN 1 21.58 23.11 -1.53 16.00
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 3.0 2.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 9 5 4 5
MONTH TO DATE 100 79 21 38
SINCE SEP 1 100 79 21 38
SINCE JUL 1 125 134 -9 62
COOLING
TODAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION SE (130)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 400 AM
LOWEST 44 400 PM
AVERAGE 67
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 89 1967
MINIMUM TEMPERATURE (F) 51 35 1972
SUNRISE AND SUNSET
SEPTEMBER 26 2026.....SUNRISE 702 AM PDT SUNSET 658 PM PDT
SEPTEMBER 27 2026.....SUNRISE 703 AM PDT SUNSET 656 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/2026-09-26 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.