NWS CLI archive · settlement source
CLISEA · 시애틀 · America/Los_Angeles · ← 2026-09-21 · 2026-09-23 → · All dates for KSEA · JSON · METAR-derived record
Final issued 2026-09-23 04:27:00 EDT · Product id iem:CDUS46-KSEW-230827:SEA:2026-09-22:final · IEM archive
Product id iem:CDUS46-KSEW-230827:SEA:2026-09-22:final · iem-afos · IEM archive
SHA-256 0d8adffe062ad5073ab42f1857344f7faf4f649e667a2d72127a219172021ec0
Product text
CDUS46 KSEW 230827
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
127 AM PDT WED SEP 23 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 22 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 68 344 PM 92 1990 70 -2 71
MINIMUM 55 1159 PM 37 1955 53 2 52
AVERAGE 62 61 1 62
PRECIPITATION (IN)
YESTERDAY 0.00 1.65 1978 0.05 -0.05 0.00
MONTH TO DATE 1.03 1.07 -0.04 0.49
SINCE OCT 1 37.94 38.80 -0.86 29.40
SINCE JAN 1 21.16 22.86 -1.70 16.00
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 4 -1 3
MONTH TO DATE 69 59 10 21
SINCE SEP 1 69 59 10 21
SINCE JUL 1 94 114 -20 45
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 100 AM
LOWEST 56 600 PM
AVERAGE 72
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1947
MINIMUM TEMPERATURE (F) 52 40 1948
SUNRISE AND SUNSET
SEPTEMBER 23 2026.....SUNRISE 658 AM PDT SUNSET 704 PM PDT
SEPTEMBER 24 2026.....SUNRISE 659 AM PDT SUNSET 702 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-230118:SEA:2026-09-22:interim · iem-afos · IEM archive
SHA-256 b35d8c511002b3fcd108a1f75596b2838a2e99bc653fa87b4a689ef958a52d71
Product text
CDUS46 KSEW 230118
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
618 PM PDT TUE SEP 22 2026
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 22 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 68 344 PM 92 1990 70 -2 71
MINIMUM 57 1213 AM 37 1955 53 4 52
AVERAGE 63 61 2 62
PRECIPITATION (IN)
TODAY 0.00 1.65 1978 0.05 -0.05 0.00
MONTH TO DATE 1.03 1.07 -0.04 0.49
SINCE OCT 1 37.94 38.80 -0.86 29.40
SINCE JAN 1 21.16 22.86 -1.70 16.00
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 2 4 -2 3
MONTH TO DATE 68 59 9 21
SINCE SEP 1 68 59 9 21
SINCE JUL 1 93 114 -21 45
COOLING
TODAY 0 0 0 0
MONTH TO DATE 2 30 -28 34
SINCE SEP 1 2 30 -28 34
SINCE JAN 1 267 263 4 328
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION SW (240)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 100 AM
LOWEST 57 100 PM
AVERAGE 72
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 84 1947
MINIMUM TEMPERATURE (F) 52 40 1948
SUNRISE AND SUNSET
SEPTEMBER 22 2026.....SUNRISE 656 AM PDT SUNSET 706 PM PDT
SEPTEMBER 23 2026.....SUNRISE 658 AM PDT SUNSET 704 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/2026-09-22 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.