{"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":"2026-10-20","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":62,"tminF":46,"precipIn":0,"precipTrace":false,"tmax":16.67,"tmin":7.78,"precip":0,"issuedAt":"2026-10-21T08:26:00.000Z","productId":"iem:CDUS46-KSEW-210826:SEA:2026-10-20:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610210826"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-10-21T01:17:00.000Z","issuedLocal":"617 PM PDT TUE OCT 20 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 210117","productId":"iem:CDUS46-KSEW-210117:SEA:2026-10-20:interim","source":"iem-afos","corrected":false,"tmaxF":62,"tmaxTimeLocal":"329 PM","tminF":46,"tminTimeLocal":"310 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610210117","parseProblems":[],"rawTextSha256":"3c2b0c788b475a179d16e657268cf2ba66f7091f4045da8735e26fd0127ecbc8","rawText":"CDUS46 KSEW 210117\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n617 PM PDT TUE OCT 20 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 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 62 329 PM 69 1987 59 3 58 \n MINIMUM 46 310 AM 29 1949 46 0 48 \n AVERAGE 54 52 2 53 \n\nPRECIPITATION (IN) \n TODAY 0.00 5.02 2003 0.14 -0.14 0.03 \n MONTH TO DATE 0.08 2.15 -2.07 1.06 \n SINCE OCT 1 0.08 2.15 -2.07 1.06 \n SINCE JAN 1 21.67 25.55 -3.88 17.33 \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 11 13 -2 12 \n MONTH TO DATE 160 194 -34 197 \n SINCE SEP 1 293 296 -3 248 \n SINCE JUL 1 318 351 -33 272 \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 10 RESULTANT WIND DIRECTION N (20) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20) \n HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (10) \n AVERAGE WIND SPEED 10.0 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.5 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 400 AM \n LOWEST 53 300 PM \n AVERAGE 73 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 59 72 1965 \n MINIMUM TEMPERATURE (F) 46 32 1949 \n\n\nSUNRISE AND SUNSET \nOCTOBER 20 2026.......SUNRISE 735 AM PDT SUNSET 612 PM PDT \nOCTOBER 21 2026.......SUNRISE 737 AM PDT SUNSET 610 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":"2026-10-21T08:26:00.000Z","issuedLocal":"126 AM PDT WED OCT 21 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 210826","productId":"iem:CDUS46-KSEW-210826:SEA:2026-10-20:final","source":"iem-afos","corrected":false,"tmaxF":62,"tmaxTimeLocal":"329 PM","tminF":46,"tminTimeLocal":"310 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610210826","parseProblems":[],"rawTextSha256":"eef18bc7c4054c7d2accc5ad944f9034c496497aef04d3d137303967200195e8","rawText":"CDUS46 KSEW 210826\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n126 AM PDT WED OCT 21 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 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 62 329 PM 69 1987 59 3 58 \n MINIMUM 46 310 AM 29 1949 46 0 48 \n AVERAGE 54 52 2 53 \n\nPRECIPITATION (IN) \n YESTERDAY 0.00 5.02 2003 0.14 -0.14 0.03 \n MONTH TO DATE 0.08 2.15 -2.07 1.06 \n SINCE OCT 1 0.08 2.15 -2.07 1.06 \n SINCE JAN 1 21.67 25.55 -3.88 17.33 \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 11 13 -2 12 \n MONTH TO DATE 160 194 -34 197 \n SINCE SEP 1 293 296 -3 248 \n SINCE JUL 1 318 351 -33 272 \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 9 RESULTANT WIND DIRECTION N (20) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20) \n HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (10) \n AVERAGE WIND SPEED 8.9 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.4 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 400 AM \n LOWEST 53 300 PM \n AVERAGE 73 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 59 72 1965 \n MINIMUM TEMPERATURE (F) 46 32 1949 \n\n\nSUNRISE AND SUNSET \nOCTOBER 21 2026.......SUNRISE 737 AM PDT SUNSET 610 PM PDT \nOCTOBER 22 2026.......SUNRISE 738 AM PDT SUNSET 608 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/2026-10-20","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-10-20"},"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."}}