{"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":"2026-09-29","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":63,"tminF":53,"precipIn":0.01,"precipTrace":false,"tmax":17.22,"tmin":11.67,"precip":0.25,"issuedAt":"2026-09-30T08:35:00.000Z","productId":"iem:CDUS46-KSEW-300835:SEA:2026-09-29:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609300835"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-09-30T01:16:00.000Z","issuedLocal":"616 PM PDT TUE SEP 29 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 300116","productId":"iem:CDUS46-KSEW-300116:SEA:2026-09-29:interim","source":"iem-afos","corrected":false,"tmaxF":63,"tmaxTimeLocal":"227 PM","tminF":55,"tminTimeLocal":"1202 AM","precipIn":0,"precipTrace":true,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609300116","parseProblems":[],"rawTextSha256":"ec769e80739da146890f703079285c1fc5617683c82254f97931acc67ca4ea4c","rawText":"CDUS46 KSEW 300116\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n616 PM PDT TUE SEP 29 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 29 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 63 227 PM 81 1992 67 -4 63 \n 1993 \n MINIMUM 55 1202 AM 37 1954 51 4 56 \n AVERAGE 59 59 0 60 \n\nPRECIPITATION (IN) \n TODAY T 0.92 1951 0.07 -0.07 0.21 \n MONTH TO DATE 1.45 1.53 -0.08 0.70 \n SINCE OCT 1 38.36 39.26 -0.90 29.61 \n SINCE JAN 1 21.58 23.32 -1.74 16.21 \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 6 6 0 5 \n MONTH TO DATE 124 97 27 47 \n SINCE SEP 1 124 97 27 47 \n SINCE JUL 1 149 152 -3 71 \n\n COOLING \n TODAY 0 0 0 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 14 RESULTANT WIND DIRECTION S (200) \n HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (190) \n AVERAGE WIND SPEED 14.6 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.9 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 900 AM \n LOWEST 67 200 AM \n AVERAGE 80 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 67 82 1992 \n MINIMUM TEMPERATURE (F) 51 36 1950 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 29 2026.....SUNRISE 706 AM PDT SUNSET 652 PM PDT \nSEPTEMBER 30 2026.....SUNRISE 707 AM PDT SUNSET 650 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":"2026-09-30T08:35:00.000Z","issuedLocal":"135 AM PDT WED SEP 30 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 300835","productId":"iem:CDUS46-KSEW-300835:SEA:2026-09-29:final","source":"iem-afos","corrected":false,"tmaxF":63,"tmaxTimeLocal":"227 PM","tminF":53,"tminTimeLocal":"647 PM","precipIn":0.01,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202609300835","parseProblems":[],"rawTextSha256":"86939188be68058bea16ef4c798b4ba8fc2b544fdacdc56b7149a15ca16ca412","rawText":"CDUS46 KSEW 300835\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n135 AM PDT WED SEP 30 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 29 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 63 227 PM 81 1992 67 -4 63 \n 1993 \n MINIMUM 53 647 PM 37 1954 51 2 56 \n AVERAGE 58 59 -1 60 \n\nPRECIPITATION (IN) \n YESTERDAY 0.01 0.92 1951 0.07 -0.06 0.21 \n MONTH TO DATE 1.46 1.53 -0.07 0.70 \n SINCE OCT 1 38.37 39.26 -0.89 29.61 \n SINCE JAN 1 21.59 23.32 -1.73 16.21 \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 7 6 1 5 \n MONTH TO DATE 125 97 28 47 \n SINCE SEP 1 125 97 28 47 \n SINCE JUL 1 150 152 -2 71 \n\n COOLING \n YESTERDAY 0 0 0 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 8 RESULTANT WIND DIRECTION S (200) \n HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (190) \n AVERAGE WIND SPEED 12.8 \n\n\nSKY COVER \n AVERAGE SKY COVER 1.0 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 900 AM \n LOWEST 67 200 AM \n AVERAGE 80 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 67 82 1992 \n MINIMUM TEMPERATURE (F) 51 36 1950 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 30 2026.....SUNRISE 707 AM PDT SUNSET 650 PM PDT \nOCTOBER 1 2026.......SUNRISE 708 AM PDT SUNSET 648 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/2026-09-29","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-09-29"},"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."}}