{"station":{"icao":"KSEA","cliId":"SEA","pil":"CLISEA","city":{"slug":"seattle","name":"시애틀","country":"United States"},"timezone":"America/Los_Angeles","feed":"https://api.weather.gov/products/types/CLI/locations/SEA","html":"https://weathermarket.io/nws-cli/KSEA","json":"https://weathermarket.io/api/nws-cli/KSEA"},"stationToday":"2026-11-14","day":{"date":"2026-09-21","status":"issued","note":"Final CLI issued - values.nwsOfficial carries the official daily values (metric here; official.issued.asReported keeps the °F / inch / mph exactly as printed).","settlement":{"tmaxF":67,"tminF":52,"precipIn":0,"precipTrace":false,"tmax":19.44,"tmin":11.11,"precip":0,"issuedAt":"2026-09-22T08:26:00.000Z","productId":"iem:CDUS46-KSEW-220826:SEA:2026-09-21:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609220826"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-09-22T01:17:00.000Z","issuedLocal":"617 PM PDT MON SEP 21 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 220117","productId":"iem:CDUS46-KSEW-220117:SEA:2026-09-21:interim","source":"iem-afos","corrected":false,"tmaxF":67,"tmaxTimeLocal":"251 PM","tminF":52,"tminTimeLocal":"623 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609220117","parseProblems":[],"rawTextSha256":"009f798b2f27342ede419d0a9c7b9c3a3baa3e2cbbdfb93a41aba3d8bba80b90","rawText":"CDUS46 KSEW 220117\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n617 PM PDT MON SEP 21 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2026...\nVALID TODAY AS OF 0500 PM LOCAL TIME.\n\nCLIMATE NORMAL PERIOD 1991 TO 2020\nCLIMATE RECORD PERIOD 1945 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n TODAY \n MAXIMUM 67 251 PM 88 1952 70 -3 69 \n 1974 \n MINIMUM 52 623 AM 39 1955 53 -1 57 \n 1960 \n AVERAGE 60 61 -1 63 \n\nPRECIPITATION (IN) \n TODAY 0.00 0.94 1981 0.06 -0.06 0.43 \n MONTH TO DATE 1.03 1.02 0.01 0.49 \n SINCE OCT 1 37.94 38.75 -0.81 29.40 \n SINCE JAN 1 21.16 22.81 -1.65 16.00 \n\nSNOWFALL (IN) \n TODAY 0.0 MM MM 0.0 \n MONTH TO DATE 0.0 0.0 \n SINCE OCT 1 3.0 2.3 \n SINCE JUL 1 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n TODAY 5 4 1 2 \n MONTH TO DATE 66 55 11 18 \n SINCE SEP 1 66 55 11 18 \n SINCE JUL 1 91 110 -19 42 \n\n COOLING \n TODAY 0 1 -1 0 \n MONTH TO DATE 2 30 -28 34 \n SINCE SEP 1 2 30 -28 34 \n SINCE JAN 1 267 263 4 328 \n...................................................................\n\n\nWIND (MPH) \n RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION W (270) \n HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (150) \n AVERAGE WIND SPEED 4.9 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.4 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n NO SIGNIFICANT WEATHER WAS OBSERVED. \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 100 AM \n LOWEST 63 400 PM \n AVERAGE 78 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 70 92 1990 \n MINIMUM TEMPERATURE (F) 53 37 1955 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 21 2026.....SUNRISE 655 AM PDT SUNSET 709 PM PDT \nSEPTEMBER 22 2026.....SUNRISE 656 AM PDT SUNSET 706 PM PDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"},{"kind":"final","asOfLocal":null,"issuedAt":"2026-09-22T08:26:00.000Z","issuedLocal":"126 AM PDT TUE SEP 22 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 220826","productId":"iem:CDUS46-KSEW-220826:SEA:2026-09-21:final","source":"iem-afos","corrected":false,"tmaxF":67,"tmaxTimeLocal":"251 PM","tminF":52,"tminTimeLocal":"623 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609220826","parseProblems":[],"rawTextSha256":"14393ac714b82871f07aee4ef23b977b8fabe3d45d35c786a8ac0978a47ea436","rawText":"CDUS46 KSEW 220826\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n126 AM PDT TUE SEP 22 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2026...\n\nCLIMATE NORMAL PERIOD 1991 TO 2020\nCLIMATE RECORD PERIOD 1945 TO 2026\n\n\nWEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST \n VALUE (LST) VALUE VALUE FROM YEAR \n NORMAL \n...................................................................\nTEMPERATURE (F) \n YESTERDAY \n MAXIMUM 67 251 PM 88 1952 70 -3 69 \n 1974 \n MINIMUM 52 623 AM 39 1955 53 -1 57 \n 1960 \n AVERAGE 60 61 -1 63 \n\nPRECIPITATION (IN) \n YESTERDAY 0.00 0.94 1981 0.06 -0.06 0.43 \n MONTH TO DATE 1.03 1.02 0.01 0.49 \n SINCE OCT 1 37.94 38.75 -0.81 29.40 \n SINCE JAN 1 21.16 22.81 -1.65 16.00 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 MM MM 0.0 \n MONTH TO DATE 0.0 0.0 \n SINCE OCT 1 3.0 2.3 \n SINCE JUL 1 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n YESTERDAY 5 4 1 2 \n MONTH TO DATE 66 55 11 18 \n SINCE SEP 1 66 55 11 18 \n SINCE JUL 1 91 110 -19 42 \n\n COOLING \n YESTERDAY 0 1 -1 0 \n MONTH TO DATE 2 30 -28 34 \n SINCE SEP 1 2 30 -28 34 \n SINCE JAN 1 267 263 4 328 \n...................................................................\n\n\nWIND (MPH) \n RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION SW (230) \n HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (150) \n AVERAGE WIND SPEED 4.2 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.4 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n NO SIGNIFICANT WEATHER WAS OBSERVED. \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 100 AM \n LOWEST 63 500 PM \n AVERAGE 78 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 70 92 1990 \n MINIMUM TEMPERATURE (F) 53 37 1955 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 22 2026.....SUNRISE 656 AM PDT SUNSET 706 PM PDT \nSEPTEMBER 23 2026.....SUNRISE 658 AM PDT SUNSET 704 PM PDT \n\n\n- INDICATES NEGATIVE NUMBERS.\nR INDICATES RECORD WAS SET OR TIED.\nMM INDICATES DATA IS MISSING.\nT INDICATES TRACE AMOUNT.\n\n\n\n\n$$"}],"html":"https://weathermarket.io/nws-cli/KSEA/2026-09-21","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-09-21"},"about":{"product":"NWS Climatological Report (CLI): the daily climate summary issued by the local NWS forecast office from the station's 1-minute ASOS record, normally 1-3 hours after local midnight (final, 'YESTERDAY') and once during the day (interim, 'TODAY AS OF'). Corrections are re-issued under the same PIL with CORRECTED in the text.","settlementRule":"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.","archive":"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.","verify":["Each issue carries the NWS product id (api.weather.gov keeps products for a limited time) and a link to the IEM AFOS permanent archive of the same product.","rawTextSha256 is the SHA-256 of the stored product text; compare it with the text at either link to confirm nothing was altered.","Permalink pattern for market rules: https://weathermarket.io/nws-cli/KSEA/YYYY-MM-DD (HTML) and https://weathermarket.io/api/nws-cli/KSEA/YYYY-MM-DD (JSON)."],"citation":"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/YYYY-MM-DD with links to the NWS product and the IEM archive. A CORRECTED re-issue published before the settlement time supersedes earlier issues."}}