NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-02 · 2026-09-04 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-04 04:26:00 EDT · Product id iem:CDUS46-KSEW-040826:SEA:2026-09-03:final · IEM archive
Product id iem:CDUS46-KSEW-040826:SEA:2026-09-03:final · iem-afos · IEM archive
SHA-256 922955c0c2a038a2add987c0a7ab4ee5ddcfc0d3976e8361ebd7fae4349f3a02
Product text
CDUS46 KSEW 040826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT FRI SEP 04 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 3 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 68 353 PM 92 1988 75 -7 84
MINIMUM 53 527 AM 45 1956 56 -3 59
AVERAGE 61 65 -4 72
PRECIPITATION (IN)
YESTERDAY 0.12 0.91 1945 0.04 0.08 0.00
MONTH TO DATE 0.35 0.12 0.23 0.00
SINCE OCT 1 37.26 37.85 -0.59 28.91
SINCE JAN 1 20.48 21.91 -1.43 15.51
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 2 2 0
MONTH TO DATE 9 6 3 0
SINCE SEP 1 9 6 3 0
SINCE JUL 1 34 61 -27 24
COOLING
YESTERDAY 0 2 -2 7
MONTH TO DATE 0 6 -6 11
SINCE SEP 1 0 6 -6 11
SINCE JAN 1 265 239 26 305
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION S (160)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 6.6
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 1100 PM
LOWEST 45 400 PM
AVERAGE 68
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 88 2017
MINIMUM TEMPERATURE (F) 56 42 1952
SUNRISE AND SUNSET
SEPTEMBER 4 2026.....SUNRISE 632 AM PDT SUNSET 743 PM PDT
SEPTEMBER 5 2026.....SUNRISE 634 AM PDT SUNSET 741 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-040117:SEA:2026-09-03:interim · iem-afos · IEM archive
SHA-256 255e548a65c32933e6a06f54685777ce18cc0332ba6c0cec2aa616f76588127a
Product text
CDUS46 KSEW 040117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT THU SEP 03 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 3 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 68 353 PM 92 1988 75 -7 84
MINIMUM 53 527 AM 45 1956 56 -3 59
AVERAGE 61 65 -4 72
PRECIPITATION (IN)
TODAY 0.09 0.91 1945 0.04 0.05 0.00
MONTH TO DATE 0.32 0.12 0.20 0.00
SINCE OCT 1 37.23 37.85 -0.62 28.91
SINCE JAN 1 20.45 21.91 -1.46 15.51
SNOWFALL (IN)
TODAY 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 MM
DEGREE DAYS
HEATING
TODAY 4 2 2 0
MONTH TO DATE 9 6 3 0
SINCE SEP 1 9 6 3 0
SINCE JUL 1 34 61 -27 24
COOLING
TODAY 0 2 -2 7
MONTH TO DATE 0 6 -6 11
SINCE SEP 1 0 6 -6 11
SINCE JAN 1 265 239 26 305
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION S (170)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 7.5
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 500 AM
LOWEST 45 400 PM
AVERAGE 66
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 88 2017
MINIMUM TEMPERATURE (F) 56 42 1952
SUNRISE AND SUNSET
SEPTEMBER 3 2026.....SUNRISE 631 AM PDT SUNSET 745 PM PDT
SEPTEMBER 4 2026.....SUNRISE 632 AM PDT SUNSET 743 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/2026-09-03 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.