{"station":{"icao":"KIAD","cliId":"IAD","pil":"CLIIAD","city":{"slug":"washington","name":"워싱턴 D.C.","country":"United States"},"timezone":"America/New_York","feed":"https://api.weather.gov/products/types/CLI/locations/IAD","html":"https://weathermarket.io/nws-cli/KIAD","json":"https://weathermarket.io/api/nws-cli/KIAD"},"stationToday":"2026-11-14","day":{"date":"2026-10-06","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":65,"tminF":44,"precipIn":0,"precipTrace":false,"tmax":18.33,"tmin":6.67,"precip":0,"issuedAt":"2026-10-07T06:35:00.000Z","productId":"iem:CDUS41-KLWX-070635:IAD:2026-10-06:final","corrected":false,"reissues":0,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610070635"},"issues":[{"kind":"interim","asOfLocal":"0500 PM","issuedAt":"2026-10-06T21:26:00.000Z","issuedLocal":"526 PM EDT TUE OCT 06 2026","office":"KLWX","wmoHeader":"CDUS41 KLWX 062126","productId":"iem:CDUS41-KLWX-062126:IAD:2026-10-06:interim","source":"iem-afos","corrected":false,"tmaxF":65,"tmaxTimeLocal":"3:54 PM","tminF":45,"tminTimeLocal":"6:26 AM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610062126","parseProblems":[],"rawTextSha256":"0b777c8875d1e2401b66f391ee8fb978c02879a044322bddd87467e1e5de39c0","rawText":"CDUS41 KLWX 062126\nCLIIAD\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC \n526 PM EDT TUE OCT 06 2026\n\n...................................\n\n...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 6 2026...\nVALID TODAY AS OF 0500 PM LOCAL TIME.\n\nCLIMATE NORMAL PERIOD: 1991 TO 2020\nCLIMATE RECORD PERIOD: 1960 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 65 3:54 PM 89 2013 72 -7 84 \n MINIMUM 45 6:26 AM 28 1968 49 -4 53 \n AVERAGE 55 60 -5 69 \n\nPRECIPITATION (IN) \n TODAY 0.00 1.05 2006 0.13 -0.13 0.00 \n MONTH TO DATE 0.40 0.76 -0.36 0.00 \n SINCE SEP 1 4.20 4.70 -0.50 1.22 \n SINCE JAN 1 33.60 33.92 -0.32 25.86 \n\nSNOWFALL (IN) \n TODAY 0.0 MM MM 0.0 0.0 0.0 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 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 TODAY 10 6 4 0 \n MONTH TO DATE 15 31 -16 17 \n SINCE SEP 1 36 76 -40 24 \n SINCE JUL 1 36 77 -41 26 \n\n COOLING \n TODAY 0 1 -1 4 \n MONTH TO DATE 19 11 8 4 \n SINCE SEP 1 243 163 80 174 \n SINCE JAN 1 1523 1219 304 1322 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION N (340) \n HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (340) \n AVERAGE WIND SPEED 4.8 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.0 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED TODAY. \n HAZE \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 74 7:00 AM \n LOWEST 34 2:00 PM \n AVERAGE 54 \n\n..........................................................\n\n\nTHE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 71 91 2007 \n MINIMUM TEMPERATURE (F) 49 31 1988 \n\n\nSUNRISE AND SUNSET \nOCTOBER 6 2026.......SUNRISE 7:11 AM EDT SUNSET 6:45 PM EDT \nOCTOBER 7 2026.......SUNRISE 7:11 AM EDT SUNSET 6:43 PM EDT \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":"2026-10-07T06:35:00.000Z","issuedLocal":"235 AM EDT WED OCT 07 2026","office":"KLWX","wmoHeader":"CDUS41 KLWX 070635","productId":"iem:CDUS41-KLWX-070635:IAD:2026-10-06:final","source":"iem-afos","corrected":false,"tmaxF":65,"tmaxTimeLocal":"4:39 PM","tminF":44,"tminTimeLocal":"11:59 PM","precipIn":0,"precipTrace":false,"snowIn":0,"snowTrace":false,"nwsProductUrl":null,"iemArchiveUrl":"https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=CLIIAD&e=202610070635","parseProblems":[],"rawTextSha256":"6b4476787a49031e1d9cc4bdc9aff92f095aab462bed1b4824feca07ca2f5336","rawText":"CDUS41 KLWX 070635\nCLIIAD\n\nCLIMATE REPORT \nNATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC \n235 AM EDT WED OCT 07 2026\n\n...................................\n\n...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 6 2026...\n\nCLIMATE NORMAL PERIOD: 1991 TO 2020\nCLIMATE RECORD PERIOD: 1960 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 65 4:39 PM 89 2013 72 -7 84 \n MINIMUM 44 11:59 PM 28 1968 49 -5 53 \n AVERAGE 55 60 -5 69 \n\nPRECIPITATION (IN) \n YESTERDAY 0.00 1.05 2006 0.13 -0.13 0.00 \n MONTH TO DATE 0.40 0.76 -0.36 0.00 \n SINCE SEP 1 4.20 4.70 -0.50 1.22 \n SINCE JAN 1 33.60 33.92 -0.32 25.86 \n\nSNOWFALL (IN) \n YESTERDAY 0.0 MM MM 0.0 0.0 0.0 \n MONTH TO DATE 0.0 0.0 0.0 0.0 \n SINCE SEP 1 0.0 0.0 0.0 0.0 \n SINCE JUL 1 0.0 0.0 0.0 0.0 \n SNOW DEPTH MM \n\nDEGREE DAYS \n HEATING \n YESTERDAY 10 6 4 0 \n MONTH TO DATE 15 31 -16 17 \n SINCE SEP 1 36 76 -40 24 \n SINCE JUL 1 36 77 -41 26 \n\n COOLING \n YESTERDAY 0 1 -1 4 \n MONTH TO DATE 19 11 8 4 \n SINCE SEP 1 243 163 80 174 \n SINCE JAN 1 1523 1219 304 1322 \n...................................................................\n\n\nWIND (MPH) \n HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION N (340) \n HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (340) \n AVERAGE WIND SPEED 3.1 \n\n\nSKY COVER \n AVERAGE SKY COVER 0.0 \n\n\nWEATHER CONDITIONS \nTHE FOLLOWING WEATHER WAS RECORDED YESTERDAY. \n HAZE \n\n\nRELATIVE HUMIDITY (PERCENT)\n HIGHEST 89 11:00 PM \n LOWEST 34 2:00 PM \n AVERAGE 62 \n\n..........................................................\n\n\nTHE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY\n NORMAL RECORD YEAR \n MAXIMUM TEMPERATURE (F) 71 91 2007 \n MINIMUM TEMPERATURE (F) 49 31 1988 \n\n\nSUNRISE AND SUNSET \nOCTOBER 7 2026.......SUNRISE 7:11 AM EDT SUNSET 6:43 PM EDT \nOCTOBER 8 2026.......SUNRISE 7:12 AM EDT SUNSET 6:42 PM EDT \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/KIAD/2026-10-06","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-06"},"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/KIAD/YYYY-MM-DD (HTML) and https://weathermarket.io/api/nws-cli/KIAD/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the final NWS Climatological Report (CLI) for station KIAD for the contract date, as archived verbatim at https://weathermarket.io/nws-cli/KIAD/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."}}