NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-24 · 2026-09-26 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-26 04:28:00 EDT · Product id iem:CDUS46-KSEW-260828:SEA:2026-09-25:final · IEM archive
Product id iem:CDUS46-KSEW-260828:SEA:2026-09-25:final · iem-afos · IEM archive
SHA-256 0aacc957be5da7c7e1996d13d6a4a58ad3b439f90e9f8d77446c3933bfaaf54f
Product text
CDUS46 KSEW 260828
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
128 AM PDT SAT SEP 26 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 25 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 62 255 PM 85 1991 69 -7 62
MINIMUM 50 1159 PM 36 1972 52 -2 50
AVERAGE 56 60 -4 56
PRECIPITATION (IN)
YESTERDAY 0.21 0.82 2023 0.06 0.15 0.00
MONTH TO DATE 1.45 1.25 0.20 0.49
SINCE OCT 1 38.36 38.98 -0.62 29.40
SINCE JAN 1 21.58 23.04 -1.46 16.00
SNOWFALL (IN)
YESTERDAY MM 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 9
MONTH TO DATE 91 74 17 33
SINCE SEP 1 91 74 17 33
SINCE JUL 1 116 129 -13 57
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 9 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 11.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 300 AM
LOWEST 62 900 AM
AVERAGE 81
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 82 2022
MINIMUM TEMPERATURE (F) 52 39 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.
$$Product id iem:CDUS46-KSEW-260123:SEA:2026-09-25:interim · iem-afos · IEM archive
SHA-256 c1ac84e4126222463a051e03a9bffa428ba9e83f20fd4c301cf0b652fad238bd
Product text
CDUS46 KSEW 260123
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
623 PM PDT FRI SEP 25 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 25 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 62 255 PM 85 1991 69 -7 62
MINIMUM 53 1110 AM 36 1972 52 1 50
AVERAGE 58 60 -2 56
PRECIPITATION (IN)
TODAY 0.21 0.82 2023 0.06 0.15 0.00
MONTH TO DATE 1.45 1.25 0.20 0.49
SINCE OCT 1 38.36 38.98 -0.62 29.40
SINCE JAN 1 21.58 23.04 -1.46 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 7 5 2 9
MONTH TO DATE 89 74 15 33
SINCE SEP 1 89 74 15 33
SINCE JUL 1 114 129 -15 57
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 8 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 10.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
RAIN
LIGHT RAIN
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 300 AM
LOWEST 62 900 AM
AVERAGE 81
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 82 2022
MINIMUM TEMPERATURE (F) 52 39 1972
SUNRISE AND SUNSET
SEPTEMBER 25 2026.....SUNRISE 700 AM PDT SUNSET 700 PM PDT
SEPTEMBER 26 2026.....SUNRISE 702 AM PDT SUNSET 658 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/2026-09-25 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.