{"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":"2026-10-17","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":49,"precipIn":0.02,"precipTrace":false,"tmax":16.67,"tmin":9.44,"precip":0.51,"issuedAt":"2026-10-18T08:26:00.000Z","productId":"iem:CDUS46-KSEW-180826:SEA:2026-10-17:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610180826"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-10-18T01:19:00.000Z","issuedLocal":"619 PM PDT SAT OCT 17 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 180119","productId":"iem:CDUS46-KSEW-180119:SEA:2026-10-17:interim","source":"iem-afos","corrected":false,"tmaxF":62,"tmaxTimeLocal":"249 PM","tminF":54,"tminTimeLocal":"1015 AM","precipIn":0.02,"precipTrace":false,"snowIn":null,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610180119","parseProblems":[],"rawTextSha256":"502f52845639e524d8b5fec3b95f5ec1a5da3721a6f3cd2e21ccc7a05f947c35","rawText":"CDUS46 KSEW 180119\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n619 PM PDT SAT OCT 17 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 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 62 249 PM 74 1989 60 2 60 \n MINIMUM 54 1015 AM 34 1949 47 7 49 \n AVERAGE 58 53 5 55 \n\nPRECIPITATION (IN) \n TODAY 0.02 1.24 2009 0.13 -0.11 T \n MONTH TO DATE 0.08 1.75 -1.67 0.60 \n SINCE OCT 1 0.08 1.75 -1.67 0.60 \n SINCE JAN 1 21.67 25.15 -3.48 16.87 \n\nSNOWFALL (IN) \n TODAY MM 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 MM \n\nDEGREE DAYS \n HEATING \n TODAY 7 12 -5 10 \n MONTH TO DATE 123 157 -34 160 \n SINCE SEP 1 256 259 -3 211 \n SINCE JUL 1 281 314 -33 235 \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 4 RESULTANT WIND DIRECTION S (160) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION S (200) \n HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (200) \n AVERAGE WIND SPEED 10.6 \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 93 200 AM \n LOWEST 56 200 PM \n AVERAGE 75 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 60 71 2023 \n MINIMUM TEMPERATURE (F) 47 32 1949 \n\n\nSUNRISE AND SUNSET \nOCTOBER 17 2026.......SUNRISE 731 AM PDT SUNSET 617 PM PDT \nOCTOBER 18 2026.......SUNRISE 732 AM PDT SUNSET 615 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":"2026-10-18T08:26:00.000Z","issuedLocal":"126 AM PDT SUN OCT 18 2026","office":"KSEW","wmoHeader":"CDUS46 KSEW 180826","productId":"iem:CDUS46-KSEW-180826:SEA:2026-10-17:final","source":"iem-afos","corrected":false,"tmaxF":62,"tmaxTimeLocal":"249 PM","tminF":49,"tminTimeLocal":"1147 PM","precipIn":0.02,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLISEA&e=202610180826","parseProblems":[],"rawTextSha256":"f15b2062f30ce2a05ff1e5cb737fe99dda0364eb2111ec0b7de6195571322f7b","rawText":"CDUS46 KSEW 180826\nCLISEA\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE SEATTLE\n126 AM PDT SUN OCT 18 2026\n\n...................................\n\n...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 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 62 249 PM 74 1989 60 2 60 \n MINIMUM 49 1147 PM 34 1949 47 2 49 \n AVERAGE 56 53 3 55 \n\nPRECIPITATION (IN) \n YESTERDAY 0.02 1.24 2009 0.13 -0.11 T \n MONTH TO DATE 0.08 1.75 -1.67 0.60 \n SINCE OCT 1 0.08 1.75 -1.67 0.60 \n SINCE JAN 1 21.67 25.15 -3.48 16.87 \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 9 12 -3 10 \n MONTH TO DATE 125 157 -32 160 \n SINCE SEP 1 258 259 -1 211 \n SINCE JUL 1 283 314 -31 235 \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 3 RESULTANT WIND DIRECTION E (90) \n HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NE (30) \n HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (200) \n AVERAGE WIND SPEED 11.2 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.8 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 93 200 AM \n LOWEST 56 200 PM \n AVERAGE 75 \n\n..........................................................\n\n\nTHE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 60 71 2023 \n MINIMUM TEMPERATURE (F) 47 32 1949 \n\n\nSUNRISE AND SUNSET \nOCTOBER 18 2026.......SUNRISE 732 AM PDT SUNSET 615 PM PDT \nOCTOBER 19 2026.......SUNRISE 734 AM PDT SUNSET 614 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/2026-10-17","json":"https://weathermarket.io/api/nws-cli/KSEA/2026-10-17"},"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."}}