NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-22 · 2026-09-24 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-24 04:26:00 EDT · Product id iem:CDUS46-KSEW-240826:SEA:2026-09-23:final · IEM archive
Product id iem:CDUS46-KSEW-240826:SEA:2026-09-23:final · iem-afos · IEM archive
SHA-256 f7ffaf816e0cd80874e3ece59175768bb7698cc3cdb4fbf7b94843f78122c975
Product text
CDUS46 KSEW 240826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT THU SEP 24 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 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 67 421 PM 84 1947 69 -2 76
MINIMUM 53 631 AM 40 1948 52 1 51
AVERAGE 60 61 -1 64
PRECIPITATION (IN)
YESTERDAY 0.00 1.08 2020 0.06 -0.06 0.00
MONTH TO DATE 1.03 1.13 -0.10 0.49
SINCE OCT 1 37.94 38.86 -0.92 29.40
SINCE JAN 1 21.16 22.92 -1.76 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 5 5 0 1
MONTH TO DATE 74 64 10 22
SINCE SEP 1 74 64 10 22
SINCE JUL 1 99 119 -20 46
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 2 RESULTANT WIND DIRECTION E (100)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 8.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 200 AM
LOWEST 43 300 PM
AVERAGE 65
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 89 1974
MINIMUM TEMPERATURE (F) 52 38 1948
SUNRISE AND SUNSET
SEPTEMBER 24 2026.....SUNRISE 659 AM PDT SUNSET 702 PM PDT
SEPTEMBER 25 2026.....SUNRISE 700 AM PDT SUNSET 700 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-240124:SEA:2026-09-23:interim · iem-afos · IEM archive
SHA-256 5ea71dc44b6513d320e9e19db66385895006c8d19131491f52684e50e7b8f83e
Product text
CDUS46 KSEW 240124
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
624 PM PDT WED SEP 23 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 23 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 67 421 PM 84 1947 69 -2 76
MINIMUM 53 631 AM 40 1948 52 1 51
AVERAGE 60 61 -1 64
PRECIPITATION (IN)
TODAY 0.00 1.08 2020 0.06 -0.06 0.00
MONTH TO DATE 1.03 1.13 -0.10 0.49
SINCE OCT 1 37.94 38.86 -0.92 29.40
SINCE JAN 1 21.16 22.92 -1.76 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 5 5 0 1
MONTH TO DATE 74 64 10 22
SINCE SEP 1 74 64 10 22
SINCE JUL 1 99 119 -20 46
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 5 RESULTANT WIND DIRECTION S (170)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 6.7
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 200 AM
LOWEST 43 300 PM
AVERAGE 65
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 89 1974
MINIMUM TEMPERATURE (F) 52 38 1948
SUNRISE AND SUNSET
SEPTEMBER 23 2026.....SUNRISE 658 AM PDT SUNSET 704 PM PDT
SEPTEMBER 24 2026.....SUNRISE 659 AM PDT SUNSET 702 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/2026-09-23 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.