{"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":"2026-11-13","day":{"date":"2026-10-27","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":57,"tminF":47,"precipIn":0.19,"precipTrace":false,"tmax":13.89,"tmin":8.33,"precip":4.83,"issuedAt":"2026-10-28T08:39:00.000Z","productId":"iem:CDUS46-KSEW-280839:SEA:2026-10-27:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610280839"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-10-28T01:17:00.000Z","issuedLocal":"617 PM PDT TUE OCT 27 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 280117","productId":"iem:CDUS46-KSEW-280117:SEA:2026-10-27:interim","source":"iem-afos","corrected":false,"tmaxF":57,"tmaxTimeLocal":"219 PM","tminF":49,"tminTimeLocal":"724 AM","precipIn":0,"precipTrace":true,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610280117","parseProblems":[],"rawTextSha256":"6a28584c73baa14add5ed3457470f548a1db6b6399fb4af7c37b809d922d02e8","rawText":"CDUS46 KSEW 280117\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n617 PM PDT TUE OCT 27 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 27 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 57 219 PM 67 1968 57 0 54 \n MINIMUM 49 724 AM 31 1970 45 4 41 \n AVERAGE 53 51 2 48 \n\nPRECIPITATION (IN) \n TODAY T 1.23 1967 0.16 -0.16 0.01 \n MONTH TO DATE 0.33 3.23 -2.90 2.81 \n SINCE OCT 1 0.33 3.23 -2.90 2.81 \n SINCE JAN 1 21.92 26.63 -4.71 19.08 \n\nSNOWFALL (IN) \n TODAY 0.0 MM MM 0.0 \n MONTH TO DATE 0.0 0.0 \n SINCE OCT 1 0.0 0.0 \n SINCE JUL 1 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n TODAY 12 14 -2 17 \n MONTH TO DATE 250 289 -39 290 \n SINCE SEP 1 383 391 -8 341 \n SINCE JUL 1 408 446 -38 365 \n\n COOLING \n TODAY 0 0 0 0 \n MONTH TO DATE 0 0 0 0 \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 SW (220) \n HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (220) \n HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (190) \n AVERAGE WIND SPEED 8.5 \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 93 400 AM \n LOWEST 64 200 PM \n AVERAGE 79 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 56 68 2017 \n MINIMUM TEMPERATURE (F) 44 29 1946 \n\n\nSUNRISE AND SUNSET \nOCTOBER 27 2026.......SUNRISE 746 AM PDT SUNSET 600 PM PDT \nOCTOBER 28 2026.......SUNRISE 747 AM PDT SUNSET 558 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":"2026-10-28T08:39:00.000Z","issuedLocal":"139 AM PDT WED OCT 28 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 280839","productId":"iem:CDUS46-KSEW-280839:SEA:2026-10-27:final","source":"iem-afos","corrected":false,"tmaxF":57,"tmaxTimeLocal":"219 PM","tminF":47,"tminTimeLocal":"1159 PM","precipIn":0.19,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610280839","parseProblems":[],"rawTextSha256":"e146c734ea39e70a2b64065cf1e24a5a25a25b77476f7c98abc50edf7e2de333","rawText":"CDUS46 KSEW 280839\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n139 AM PDT WED OCT 28 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 27 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 57 219 PM 67 1968 57 0 54 \n MINIMUM 47 1159 PM 31 1970 45 2 41 \n AVERAGE 52 51 1 48 \n\nPRECIPITATION (IN) \n YESTERDAY 0.19 1.23 1967 0.16 0.03 0.01 \n MONTH TO DATE 0.52 3.23 -2.71 2.81 \n SINCE OCT 1 0.52 3.23 -2.71 2.81 \n SINCE JAN 1 22.11 26.63 -4.52 19.08 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 MM MM 0.0 \n MONTH TO DATE 0.0 0.0 \n SINCE OCT 1 0.0 0.0 \n SINCE JUL 1 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n YESTERDAY 13 14 -1 17 \n MONTH TO DATE 251 289 -38 290 \n SINCE SEP 1 384 391 -7 341 \n SINCE JUL 1 409 446 -37 365 \n\n COOLING \n YESTERDAY 0 0 0 0 \n MONTH TO DATE 0 0 0 0 \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 10 RESULTANT WIND DIRECTION SW (210) \n HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION S (190) \n AVERAGE WIND SPEED 10.9 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.9 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 400 AM \n LOWEST 64 200 PM \n AVERAGE 79 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 56 68 2017 \n MINIMUM TEMPERATURE (F) 44 29 1946 \n\n\nSUNRISE AND SUNSET \nOCTOBER 28 2026.......SUNRISE 747 AM PDT SUNSET 558 PM PDT \nOCTOBER 29 2026.......SUNRISE 749 AM PDT SUNSET 556 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/2026-10-27","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-10-27"},"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."}}