{"station":{"icao":"KIAD","city":{"slug":"washington","name":"Washington D.C.","country":"United States"},"timezone":"America/New_York","lat":38.91,"lon":-77.04,"us":true,"html":"https://weathermarket.io/station/KIAD","json":"https://weathermarket.io/api/station/KIAD","nwsCli":{"html":"https://weathermarket.io/nws-cli/KIAD","json":"https://weathermarket.io/api/nws-cli/KIAD"}},"date":"2026-10-28","window":{"date":"2026-10-28","timezone":"America/New_York","dayStartUtc":"2026-10-28T04:00:00.000Z","dayEndUtc":"2026-10-29T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":18.9,"tmaxAt":"2026-10-28T18:52:00.000Z","tmin":7.8,"tminAt":"2026-10-28T09:52:00.000Z","tavg":12.8,"humidityMean":80.2,"windMean":0.7,"windMax":3.6,"windMaxAt":"2026-10-28T18:52:00.000Z","precipObservedCount":0,"nObservations":26,"maxGapMinutes":60,"units":{"temperature":"°C","wind":"m/s","humidity":"%"},"source":"Extremes over the METAR observations listed in this record (hourly plus special reports) - the same record values.metarDerived carries in /api/station/{icao}/daily"},"extremes":{"tmax":{"obsTimeUtc":"2026-10-28T18:52:00.000Z","obsTimeLocal":"2026-10-28T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281852Z 13007KT 9SM FEW030 BKN250 19/10 A3036 RMK AO2 SLP281 T01890100","temp":18.9,"dewpoint":10,"humidity":56,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-28T09:52:00.000Z","obsTimeLocal":"2026-10-28T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280952Z 00000KT 6SM R01R/5000VP6000FT BR FEW010 08/07 A3040 RMK AO2 SLP294 T00780072 $","temp":7.8,"dewpoint":7.2,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-28T18:52:00.000Z","obsTimeLocal":"2026-10-28T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281852Z 13007KT 9SM FEW030 BKN250 19/10 A3036 RMK AO2 SLP281 T01890100","temp":18.9,"dewpoint":10,"humidity":56,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-29T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"a869e9a40a8c8f31","lastChangedAt":"2026-10-29T04:10:38.740Z","corrections":[{"obsTimeUtc":"2026-10-29T03:52:00.000Z","correctedAt":"2026-10-29T04:10:38.740Z","original":"METAR KIAD 290352Z 00000KT 10SM BKN033 10/08 A3034 RMK AO2 SLP272 T01000083","corrected":"METAR KIAD 290352Z COR 00000KT 10SM SCT033 SCT120 10/08 A3034 RMK AO2 SLP272 T01000083"}],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-28?format=record","status":"anchored","sha256":"b5162be79b6af5bbfa57961a7617424db2e359d10df24b6c5a798da5e6e1b1da","revision":"a869e9a40a8c8f31","flareTxHash":"0xd1820a9490fa0f7d5a2f7c7036f9dd753ea96f4b0d435325aecd2195f0c7bc47","flareBlock":73860312,"anchoredAt":"2026-11-06T05:01:27.405Z","explorer":"https://flare-explorer.flare.network/tx/0xd1820a9490fa0f7d5a2f7c7036f9dd753ea96f4b0d435325aecd2195f0c7bc47","matchesCurrent":true,"note":"GET the record bytes, SHA-256 them, and call SnapshotAnchor.isAnchored(sha256) on Flare - the anchored record is the one to settle on"},"qc":{"summary":{"good":26,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-28T18:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-28T09:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":18.9,"tmin":7.8,"differsFromRecord":false},"note":"Flags are attached beside the anchored record and are not part of its bytes; the record's extremes are unchanged. A suspect extreme is usable but worth checking against the raw text (extremes.*.reasons); a bad report is physically impossible and excludingBad shows the extremes without it."},"official":{"status":"issued","tmax":19.44,"tmin":7.22,"precip":0,"corrected":false,"issuedAt":"2026-10-29T06:23:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-28","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-28"},"observations":[{"obsTimeUtc":"2026-10-28T04:52:00.000Z","obsTimeLocal":"2026-10-28T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280452Z 17003KT 10SM CLR 11/09 A3038 RMK AO2 SLP286 T01110094 402220067 $","temp":11.1,"dewpoint":9.4,"humidity":89,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T05:52:00.000Z","obsTimeLocal":"2026-10-28T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280552Z 00000KT 10SM CLR 09/09 A3038 RMK AO2 SLP288 T00940089 10156 20094 51007 $","temp":9.4,"dewpoint":8.9,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T06:52:00.000Z","obsTimeLocal":"2026-10-28T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280652Z 00000KT 7SM CLR 09/08 A3039 RMK AO2 SLP289 T00890083 $","temp":8.9,"dewpoint":8.3,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T07:52:00.000Z","obsTimeLocal":"2026-10-28T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280752Z 00000KT 7SM CLR 09/08 A3038 RMK AO2 SLP288 T00890083 $","temp":8.9,"dewpoint":8.3,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T08:52:00.000Z","obsTimeLocal":"2026-10-28T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280852Z 29003KT 6SM R01R/5500VP6000FT BR FEW010 08/08 A3039 RMK AO2 SLP289 T00830078 52001 $","temp":8.3,"dewpoint":7.8,"humidity":97,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T09:52:00.000Z","obsTimeLocal":"2026-10-28T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280952Z 00000KT 6SM R01R/5000VP6000FT BR FEW010 08/07 A3040 RMK AO2 SLP294 T00780072 $","temp":7.8,"dewpoint":7.2,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T10:39:00.000Z","obsTimeLocal":"2026-10-28T06:39:00-04:00","metarType":"SPECI","raw":"SPECI KIAD 281039Z 00000KT 6SM BR FEW007 BKN013 08/08 A3041 RMK AO2 T00780078 $","temp":7.8,"dewpoint":7.8,"humidity":100,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T10:52:00.000Z","obsTimeLocal":"2026-10-28T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281052Z 00000KT 6SM BR SCT008 BKN013 08/08 A3041 RMK AO2 SLP298 T00830078 $","temp":8.3,"dewpoint":7.8,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T11:21:00.000Z","obsTimeLocal":"2026-10-28T07:21:00-04:00","metarType":"SPECI","raw":"SPECI KIAD 281121Z 00000KT 6SM BR FEW008 SCT012 SCT090 BKN250 08/08 A3042 RMK AO2 T00830078","temp":8.3,"dewpoint":7.8,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T11:52:00.000Z","obsTimeLocal":"2026-10-28T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281152Z 00000KT 6SM BR FEW007 SCT012 SCT090 BKN250 08/08 A3042 RMK AO2 SLP303 T00830078 10094 20072 51012","temp":8.3,"dewpoint":7.8,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T12:52:00.000Z","obsTimeLocal":"2026-10-28T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281252Z 00000KT 7SM FEW007 FEW012 SCT250 12/10 A3044 RMK AO2 SLP307 T01170100","temp":11.7,"dewpoint":10,"humidity":89,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T13:52:00.000Z","obsTimeLocal":"2026-10-28T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281352Z 00000KT 10SM FEW038 BKN250 14/11 A3044 RMK AO2 SLP309 T01390111","temp":13.9,"dewpoint":11.1,"humidity":83,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T14:52:00.000Z","obsTimeLocal":"2026-10-28T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281452Z 00000KT 10SM FEW035 FEW080 BKN250 16/11 A3044 RMK AO2 SLP307 T01610106 50006","temp":16.1,"dewpoint":10.6,"humidity":70,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T15:52:00.000Z","obsTimeLocal":"2026-10-28T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281552Z 00000KT 10SM FEW025 FEW035 BKN250 17/10 A3043 RMK AO2 SLP303 T01670100","temp":16.7,"dewpoint":10,"humidity":65,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T16:52:00.000Z","obsTimeLocal":"2026-10-28T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281652Z 00000KT 10SM FEW025 FEW035 BKN250 18/10 A3040 RMK AO2 SLP294 T01830100","temp":18.3,"dewpoint":10,"humidity":58,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T17:52:00.000Z","obsTimeLocal":"2026-10-28T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281752Z 00000KT 10SM FEW030 BKN250 18/09 A3038 RMK AO2 SLP287 T01830094 10183 20083 58020","temp":18.3,"dewpoint":9.4,"humidity":56,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T18:52:00.000Z","obsTimeLocal":"2026-10-28T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281852Z 13007KT 9SM FEW030 BKN250 19/10 A3036 RMK AO2 SLP281 T01890100","temp":18.9,"dewpoint":10,"humidity":56,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T19:52:00.000Z","obsTimeLocal":"2026-10-28T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 281952Z 15006KT 10SM FEW038 BKN110 OVC200 18/11 A3035 RMK AO2 SLP278 T01830106","temp":18.3,"dewpoint":10.6,"humidity":61,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T20:52:00.000Z","obsTimeLocal":"2026-10-28T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 282052Z 15005KT 10SM FEW040 BKN110 OVC200 18/10 A3035 RMK AO2 SLP275 T01780100 56012","temp":17.8,"dewpoint":10,"humidity":60,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T21:52:00.000Z","obsTimeLocal":"2026-10-28T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 282152Z 00000KT 10SM BKN100 BKN200 17/11 A3035 RMK AO2 SLP275 T01720106","temp":17.2,"dewpoint":10.6,"humidity":65,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T22:52:00.000Z","obsTimeLocal":"2026-10-28T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 282252Z 15003KT 10SM BKN110 BKN200 16/11 A3034 RMK AO2 SLP276 T01610106","temp":16.1,"dewpoint":10.6,"humidity":70,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T23:52:00.000Z","obsTimeLocal":"2026-10-28T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 282352Z 13004KT 10SM BKN110 BKN200 15/09 A3035 RMK AO2 SLP276 T01500094 10194 20144 55000","temp":15,"dewpoint":9.4,"humidity":69,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T00:52:00.000Z","obsTimeLocal":"2026-10-28T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290052Z 12003KT 10SM SCT110 SCT200 14/08 A3035 RMK AO2 SLP275 T01440083","temp":14.4,"dewpoint":8.3,"humidity":67,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T01:52:00.000Z","obsTimeLocal":"2026-10-28T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290152Z 11003KT 10SM FEW120 12/08 A3034 RMK AO2 SLP275 T01220083","temp":12.2,"dewpoint":8.3,"humidity":77,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T02:52:00.000Z","obsTimeLocal":"2026-10-28T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290252Z 00000KT 10SM FEW120 10/08 A3034 RMK AO2 SLP273 T01000083 58002","temp":10,"dewpoint":8.3,"humidity":89,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T03:52:00.000Z","obsTimeLocal":"2026-10-28T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290352Z COR 00000KT 10SM SCT033 SCT120 10/08 A3034 RMK AO2 SLP272 T01000083","temp":10,"dewpoint":8.3,"humidity":89,"wind":0,"precipObserved":false,"correctedAt":"2026-10-29T04:10:38.740Z","originalRaw":"METAR KIAD 290352Z 00000KT 10SM BKN033 10/08 A3034 RMK AO2 SLP272 T01000083"}],"about":{"record":"Station-day record: the daily extremes over every METAR observation (hourly plus special reports) received for the station's local calendar day - local midnight to local midnight, daylight saving applied. Temperatures are whole degrees Celsius as reported in METAR; a short-lived peak between reports can be missed. This is not a model or an aggregate - every value points at the report that produced it, and every report in the day is listed verbatim.","settlementRule":"The settlement value is the daily maximum (or minimum) of this record once it is final: the local day has ended and the 3-hour correction hold has passed. A day whose longest gap between reports exceeds the station's normal interval plus 30 minutes is final but flagged not settleable - a market should treat it as a review case. Once final, the canonical record bytes are hashed (SHA-256) and the hash is written to the SnapshotAnchor contract on Flare; the anchored record is the settlement record even if reports change afterwards (matchesCurrent then reads false). US markets usually settle on the official NWS CLI value instead - see the NWS CLI archive for this station; both values are shown side by side.","verify":["Every METAR in the day is listed with its raw text; compare it with the independent archives linked under links.external (IEM ASOS archive, Ogimet).","GET links.record for the canonical record bytes, SHA-256 them and compare with anchor.sha256; call SnapshotAnchor.isAnchored(sha256) on Flare (anchor.contract, anchor.chainId) to confirm the hash is on-chain. anchor.explorer opens the anchoring transaction.","Permalink pattern for market rules: https://weathermarket.io/station/KIAD/YYYY-MM-DD (HTML) and https://weathermarket.io/api/station/KIAD/YYYY-MM-DD (JSON)."],"citation":"Settlement source: the METAR-derived station-day record for KIAD for the contract date (station-local calendar day), as published at https://weathermarket.io/station/KIAD/YYYY-MM-DD with every observation used, the finality status and the Flare anchor of the record. The daily value is the extreme over the hourly and special METAR reports in that day; a short-lived peak between reports may be missed. If the record is not final and settleable by the resolution deadline, the market is flagged for review."},"links":{"html":"https://weathermarket.io/station/KIAD/2026-10-28","json":"https://weathermarket.io/api/station/KIAD/2026-10-28","record":"https://weathermarket.io/api/station/KIAD/2026-10-28?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-27","next":"https://weathermarket.io/station/KIAD/2026-10-29","station":"https://weathermarket.io/station/KIAD","external":{"iem":"https://mesonet.agron.iastate.edu/cgi-bin/request/asos.py?station=IAD&data=metar&year1=2026&month1=10&day1=28&year2=2026&month2=10&day2=30&tz=Etc%2FUTC&format=onlycomma&latlon=no&elev=no&missing=M&trace=T&direct=no&report_type=3&report_type=4","ogimet":"https://www.ogimet.com/display_metars2.php?lang=en&lugar=KIAD&tipo=SA&ord=REV&nil=SI&fmt=html&ano=2026&mes=10&day=28&hora=4&anof=2026&mesf=10&dayf=29&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}