NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-10-20 · 2026-10-22 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-10-22 04:27:00 EDT · Product id iem:CDUS46-KSEW-220827:SEA:2026-10-21:final · IEM archive
Product id iem:CDUS46-KSEW-220827:SEA:2026-10-21:final · iem-afos · IEM archive
SHA-256 691b67604646798378fa4947adee79c092ce98ebb96f7d19daf4b43be1fe5d9e
Product text
CDUS46 KSEW 220827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT THU OCT 22 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 21 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 64 350 PM 72 1965 59 5 61
MINIMUM 43 723 AM 32 1949 46 -3 44
AVERAGE 54 52 2 53
PRECIPITATION (IN)
YESTERDAY 0.00 1.61 2017 0.14 -0.14 0.00
MONTH TO DATE 0.08 2.29 -2.21 1.06
SINCE OCT 1 0.08 2.29 -2.21 1.06
SINCE JAN 1 21.67 25.69 -4.02 17.33
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 11 13 -2 12
MONTH TO DATE 171 207 -36 209
SINCE SEP 1 304 309 -5 260
SINCE JUL 1 329 364 -35 284
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION N (350)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 3.3
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 900 AM
LOWEST 62 700 PM
AVERAGE 81
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 58 70 1965
MINIMUM TEMPERATURE (F) 46 34 1950
SUNRISE AND SUNSET
OCTOBER 22 2026.......SUNRISE 738 AM PDT SUNSET 608 PM PDT
OCTOBER 23 2026.......SUNRISE 740 AM PDT SUNSET 606 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-220121:SEA:2026-10-21:interim · iem-afos · IEM archive
SHA-256 a2c08f53e6ca7d339bd59b8c6a6a5fac8d85c5a0b638b6787794180c19432b7a
Product text
CDUS46 KSEW 220121
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
621 PM PDT WED OCT 21 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 21 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 64 350 PM 72 1965 59 5 61
MINIMUM 43 723 AM 32 1949 46 -3 44
AVERAGE 54 52 2 53
PRECIPITATION (IN)
TODAY 0.00 1.61 2017 0.14 -0.14 0.00
MONTH TO DATE 0.08 2.29 -2.21 1.06
SINCE OCT 1 0.08 2.29 -2.21 1.06
SINCE JAN 1 21.67 25.69 -4.02 17.33
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 0.0 0.0
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 11 13 -2 12
MONTH TO DATE 171 207 -36 209
SINCE SEP 1 304 309 -5 260
SINCE JUL 1 329 364 -35 284
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 0 RESULTANT WIND DIRECTION W (290)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 2.4
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 900 AM
LOWEST 77 1100 AM
AVERAGE 89
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 58 70 1965
MINIMUM TEMPERATURE (F) 46 34 1950
SUNRISE AND SUNSET
OCTOBER 21 2026.......SUNRISE 737 AM PDT SUNSET 610 PM PDT
OCTOBER 22 2026.......SUNRISE 738 AM PDT SUNSET 608 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/2026-10-21 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.