{"station":{"icao":"KORD","cliId":"ORD","pil":"CLIORD","city":{"slug":"chicago","name":"시카고","country":"United States"},"timezone":"America/Chicago","feed":"https://api.weather.gov/products/types/CLI/locations/ORD","html":"https://weathermarket.io/nws-cli/KORD","json":"https://weathermarket.io/api/nws-cli/KORD"},"stationToday":"2026-11-14","day":{"date":"2026-08-31","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":87,"tminF":71,"precipIn":0.65,"precipTrace":false,"tmax":30.56,"tmin":21.67,"precip":16.51,"issuedAt":"2026-09-01T06:33:00.000Z","productId":"iem:CDUS43-KLOT-010633:ORD:2026-08-31:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIORD&e=202609010633"},"issues":[{"kind":"final","asOfLocal":null,"issuedAt":"2026-09-01T06:33:00.000Z","issuedLocal":"133 AM CDT TUE SEP 01 2026","office":"KLOT","wmoHeader":"CDUS43 KLOT 010633","productId":"iem:CDUS43-KLOT-010633:ORD:2026-08-31:final","source":"iem-afos","corrected":false,"tmaxF":87,"tmaxTimeLocal":"12:42 PM","tminF":71,"tminTimeLocal":"9:23 AM","precipIn":0.65,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIORD&e=202609010633","parseProblems":[],"rawTextSha256":"3347c2ad657cf1e14d9dda6219b83bec68d16e2f8971f8c61ebdde92785caea6","rawText":"CDUS43 KLOT 010633\nCLIORD\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE CHICAGO IL\n133 AM CDT TUE SEP 01 2026\n\n...................................\n\n...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 31 2026...\n\nCLIMATE NORMAL PERIOD: 1991 TO 2020\nCLIMATE RECORD PERIOD: 1871 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 87 12:42 PM 99 1953 80 7 75 \n MINIMUM 71 9:23 AM 47 1872 63 8 54 \n AVERAGE 79 72 7 65 \n\nPRECIPITATION (IN) \n YESTERDAY 0.65 1.24 1977 0.14 0.51 0.00 \n MONTH TO DATE 5.02 4.25 0.77 5.03 \n SINCE JUN 1 15.38 12.06 3.32 12.95 \n SINCE JAN 1 30.97 26.71 4.26 22.45 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 0.0 MM 0.0 0.0 0.0 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE JUN 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n SNOW DEPTH 0 \n\nDEGREE DAYS \n HEATING \n YESTERDAY 0 0 0 0 \n MONTH TO DATE 0 0 0 5 \n SINCE JUN 1 11 33 -22 18 \n SINCE JUL 1 0 2 -2 5 \n\n COOLING \n YESTERDAY 14 7 7 0 \n MONTH TO DATE 293 277 16 269 \n SINCE JUN 1 848 802 46 958 \n SINCE JAN 1 926 872 54 992 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (220) \n HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (230) \n AVERAGE WIND SPEED 8.1 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.8 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n THUNDERSTORM \n HEAVY RAIN \n RAIN \n LIGHT RAIN \n FOG \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 87 7:00 AM \n LOWEST 55 12:00 PM \n AVERAGE 71 \n\n..........................................................\n\n\nTHE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 80 101 1953 \n MINIMUM TEMPERATURE (F) 62 45 1949 \n\n\nSUNRISE AND SUNSET \nSEPTEMBER 1 2026.....SUNRISE 6:17 AM CDT SUNSET 7:25 PM CDT \nSEPTEMBER 2 2026.....SUNRISE 6:18 AM CDT SUNSET 7:23 PM CDT \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/KORD/2026-08-31","json":"https://weathermarket.io/api/nws-cli/KORD/2026-08-31"},"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/KORD/YYYY-MM-DD (HTML) and https://weathermarket.io/api/nws-cli/KORD/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the final NWS Climatological Report (CLI) for station KORD for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KORD/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."}}