NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-08-31 · 2026-09-02 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-02 04:26:00 EDT · Product id iem:CDUS46-KSEW-020826:SEA:2026-09-01:final · IEM archive
Product id iem:CDUS46-KSEW-020826:SEA:2026-09-01:final · iem-afos · IEM archive
SHA-256 5bae37be09d0a3edf157b9eb6f564be2749d61639990e5edc496c3d814ed1a97
Product text
CDUS46 KSEW 020826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT WED SEP 02 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 1 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 66 331 PM 91 1987 75 -9 71
MINIMUM 57 625 AM 46 1973 56 1 58
AVERAGE 62 66 -4 65
PRECIPITATION (IN)
YESTERDAY T 0.55 1978 0.04 -0.04 0.00
MONTH TO DATE T 0.04 -0.04 0.00
SINCE OCT 1 36.91 37.77 -0.86 28.91
SINCE JAN 1 20.13 21.83 -1.70 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 3 2 1 0
MONTH TO DATE 3 2 1 0
SINCE SEP 1 3 2 1 0
SINCE JUL 1 28 57 -29 24
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 0 2 -2 0
SINCE SEP 1 0 2 -2 0
SINCE JAN 1 265 235 30 294
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 7.6
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 700 PM
LOWEST 65 1100 AM
AVERAGE 79
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 98 1988
MINIMUM TEMPERATURE (F) 56 41 1960
SUNRISE AND SUNSET
SEPTEMBER 2 2026.....SUNRISE 630 AM PDT SUNSET 747 PM PDT
SEPTEMBER 3 2026.....SUNRISE 631 AM PDT SUNSET 745 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-020117:SEA:2026-09-01:interim · iem-afos · IEM archive
SHA-256 e470d1612244f43be1a860e6bb3961186bfe649af631de1e3925933ae0b1b114
Product text
CDUS46 KSEW 020117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT TUE SEP 01 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 1 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 66 331 PM 91 1987 75 -9 71
MINIMUM 57 625 AM 46 1973 56 1 58
AVERAGE 62 66 -4 65
PRECIPITATION (IN)
TODAY 0.00 0.55 1978 0.04 -0.04 0.00
MONTH TO DATE 0.00 0.04 -0.04 0.00
SINCE OCT 1 36.91 37.77 -0.86 28.91
SINCE JAN 1 20.13 21.83 -1.70 15.51
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 3 2 1 0
MONTH TO DATE 3 2 1 0
SINCE SEP 1 3 2 1 0
SINCE JUL 1 28 57 -29 24
COOLING
TODAY 0 2 -2 0
MONTH TO DATE 0 2 -2 0
SINCE SEP 1 0 2 -2 0
SINCE JAN 1 265 235 30 294
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 7.1
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 600 AM
LOWEST 65 1100 AM
AVERAGE 79
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 98 1988
MINIMUM TEMPERATURE (F) 56 41 1960
SUNRISE AND SUNSET
SEPTEMBER 1 2026.....SUNRISE 628 AM PDT SUNSET 749 PM PDT
SEPTEMBER 2 2026.....SUNRISE 630 AM PDT SUNSET 747 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/2026-09-01 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.