NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-01 · 2026-09-03 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-03 04:26:00 EDT · Product id iem:CDUS46-KSEW-030826:SEA:2026-09-02:final · IEM archive
Product id iem:CDUS46-KSEW-030826:SEA:2026-09-02:final · iem-afos · IEM archive
SHA-256 b48c4c405d97e9acb72f2730dad83d561fdbf23e0a84fcad812649a0302e48d3
Product text
CDUS46 KSEW 030826
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
126 AM PDT THU SEP 03 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 2 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 70 1102 AM 98 1988 75 -5 79
MINIMUM 55 1109 PM 41 1960 56 -1 58
AVERAGE 63 66 -3 69
PRECIPITATION (IN)
YESTERDAY 0.23 0.71 1979 0.04 0.19 0.00
MONTH TO DATE 0.23 0.08 0.15 0.00
SINCE OCT 1 37.14 37.81 -0.67 28.91
SINCE JAN 1 20.36 21.87 -1.51 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 2 2 0 0
MONTH TO DATE 5 4 1 0
SINCE SEP 1 5 4 1 0
SINCE JUL 1 30 59 -29 24
COOLING
YESTERDAY 0 2 -2 4
MONTH TO DATE 0 4 -4 4
SINCE SEP 1 0 4 -4 4
SINCE JAN 1 265 237 28 298
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 200 AM
LOWEST 47 1100 AM
AVERAGE 70
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 92 1988
MINIMUM TEMPERATURE (F) 56 45 1956
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.
$$Product id iem:CDUS46-KSEW-030117:SEA:2026-09-02:interim · iem-afos · IEM archive
SHA-256 6586e0181d172479375c3b0525dd8362be91a49d6833333dc31e792bf1b6c7ed
Product text
CDUS46 KSEW 030117
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
617 PM PDT WED SEP 02 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 2 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 70 1102 AM 98 1988 75 -5 79
MINIMUM 58 610 AM 41 1960 56 2 58
AVERAGE 64 66 -2 69
PRECIPITATION (IN)
TODAY 0.19 0.71 1979 0.04 0.15 0.00
MONTH TO DATE 0.19 0.08 0.11 0.00
SINCE OCT 1 37.10 37.81 -0.71 28.91
SINCE JAN 1 20.32 21.87 -1.55 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 1 2 -1 0
MONTH TO DATE 4 4 0 0
SINCE SEP 1 4 4 0 0
SINCE JUL 1 29 59 -30 24
COOLING
TODAY 0 2 -2 4
MONTH TO DATE 0 4 -4 4
SINCE SEP 1 0 4 -4 4
SINCE JAN 1 265 237 28 298
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION S (180)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 7.2
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 200 AM
LOWEST 47 1100 AM
AVERAGE 70
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 92 1988
MINIMUM TEMPERATURE (F) 56 45 1956
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.
$$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/2026-09-02 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.