NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-13 · 2026-09-15 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-15 04:26:00 EDT · Product id iem:CDUS46-KSEW-150826:SEA:2026-09-14:final · IEM archive
Product id iem:CDUS46-KSEW-150826:SEA:2026-09-14:final · iem-afos · IEM archive
SHA-256 f51b488c4fdd4615f0327c86d21dcd055ba9c7a1ffbbaa0c1cfac26ce4d1597a
Product text
CDUS46 KSEW 150826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT TUE SEP 15 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 14 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 67 217 PM 93 1979 72 -5 68
MINIMUM 54 422 AM 46 1947 54 0 57
1955
1986
AVERAGE 61 63 -2 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.73 1949 0.05 -0.05 T
MONTH TO DATE 1.02 0.64 0.38 0.06
SINCE OCT 1 37.93 38.37 -0.44 28.97
SINCE JAN 1 21.15 22.43 -1.28 15.57
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 4 3 1 2
MONTH TO DATE 41 30 11 7
SINCE SEP 1 41 30 11 7
SINCE JUL 1 66 85 -19 31
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 1 23 -22 22
SINCE SEP 1 1 23 -22 22
SINCE JAN 1 266 256 10 316
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 5.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 500 AM
LOWEST 50 400 PM
AVERAGE 70
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 93 1967
MINIMUM TEMPERATURE (F) 54 42 1952
SUNRISE AND SUNSET
SEPTEMBER 15 2026.....SUNRISE 647 AM PDT SUNSET 721 PM PDT
SEPTEMBER 16 2026.....SUNRISE 648 AM PDT SUNSET 719 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-150128:SEA:2026-09-14:interim · iem-afos · IEM archive
SHA-256 25b0c51339660c05a2197f7a6716cadbb13e399c7331e0ec4d0994bf854699d0
Product text
CDUS46 KSEW 150128
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
628 PM PDT MON SEP 14 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 14 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 67 217 PM 93 1979 72 -5 68
MINIMUM 54 422 AM 46 1947 54 0 57
1955
1986
AVERAGE 61 63 -2 63
PRECIPITATION (IN)
TODAY 0.00 0.73 1949 0.05 -0.05 T
MONTH TO DATE 1.02 0.64 0.38 0.06
SINCE OCT 1 37.93 38.37 -0.44 28.97
SINCE JAN 1 21.15 22.43 -1.28 15.57
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 4 3 1 2
MONTH TO DATE 41 30 11 7
SINCE SEP 1 41 30 11 7
SINCE JUL 1 66 85 -19 31
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 1 23 -22 22
SINCE SEP 1 1 23 -22 22
SINCE JAN 1 266 256 10 316
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 7.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 500 AM
LOWEST 50 400 PM
AVERAGE 70
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 93 1967
MINIMUM TEMPERATURE (F) 54 42 1952
SUNRISE AND SUNSET
SEPTEMBER 14 2026.....SUNRISE 646 AM PDT SUNSET 723 PM PDT
SEPTEMBER 15 2026.....SUNRISE 647 AM PDT SUNSET 721 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/2026-09-14 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.