{"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":"2026-10-29","window":{"date":"2026-10-29","timezone":"America/New_York","dayStartUtc":"2026-10-29T04:00:00.000Z","dayEndUtc":"2026-10-30T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":22.8,"tmaxAt":"2026-10-29T19:52:00.000Z","tmin":10,"tminAt":"2026-10-29T04:52:00.000Z","tavg":15.6,"humidityMean":77.9,"windMean":1.3,"windMax":3.6,"windMaxAt":"2026-10-29T15:52:00.000Z","precipObservedCount":0,"nObservations":25,"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":"2026-10-29T19:52:00.000Z","obsTimeLocal":"2026-10-29T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291952Z 00000KT 10SM FEW030 23/11 A3016 RMK AO2 SLP213 T02280111","temp":22.8,"dewpoint":11.1,"humidity":48,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-29T04:52:00.000Z","obsTimeLocal":"2026-10-29T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290452Z 00000KT 10SM SCT032 SCT120 10/09 A3033 RMK AO2 SLP269 T01000089 401940072","temp":10,"dewpoint":8.9,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-29T15:52:00.000Z","obsTimeLocal":"2026-10-29T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291552Z 18007KT 10SM FEW033 19/13 A3026 RMK AO2 SLP247 T01940128","temp":19.4,"dewpoint":12.8,"humidity":66,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-30T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"c93c3b27297d44a1","lastChangedAt":"2026-10-30T03:55:38.360Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-29?format=record","status":"anchored","sha256":"9196baa85193b124c73db7435375d450cd999406cbeb23153c45aaf39c1aa110","revision":"c93c3b27297d44a1","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":25,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-29T19:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-29T04:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":22.8,"tmin":10,"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":22.78,"tmin":10,"precip":0,"corrected":false,"issuedAt":"2026-10-30T06:24:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-29","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-29"},"observations":[{"obsTimeUtc":"2026-10-29T04:52:00.000Z","obsTimeLocal":"2026-10-29T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290452Z 00000KT 10SM SCT032 SCT120 10/09 A3033 RMK AO2 SLP269 T01000089 401940072","temp":10,"dewpoint":8.9,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T05:52:00.000Z","obsTimeLocal":"2026-10-29T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290552Z 00000KT 10SM BKN029 12/09 A3032 RMK AO2 SLP266 T01170094 10150 20094 58006","temp":11.7,"dewpoint":9.4,"humidity":86,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T06:52:00.000Z","obsTimeLocal":"2026-10-29T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290652Z 00000KT 10SM OVC029 12/09 A3031 RMK AO2 SLP264 T01170094","temp":11.7,"dewpoint":9.4,"humidity":86,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T07:52:00.000Z","obsTimeLocal":"2026-10-29T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290752Z 00000KT 10SM OVC028 12/10 A3030 RMK AO2 SLP260 T01220100","temp":12.2,"dewpoint":10,"humidity":86,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T08:52:00.000Z","obsTimeLocal":"2026-10-29T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290852Z 17003KT 10SM OVC029 13/11 A3029 RMK AO2 SLP255 T01280111 58010","temp":12.8,"dewpoint":11.1,"humidity":89,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T08:59:00.000Z","obsTimeLocal":"2026-10-29T04:59:00-04:00","metarType":"SPECI","raw":"SPECI KIAD 290859Z 18003KT 10SM OVC031 13/11 A3029 RMK AO2 T01280111","temp":12.8,"dewpoint":11.1,"humidity":89,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T09:52:00.000Z","obsTimeLocal":"2026-10-29T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 290952Z 16003KT 10SM OVC032 13/11 A3029 RMK AO2 SLP255 T01280111","temp":12.8,"dewpoint":11.1,"humidity":89,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T10:52:00.000Z","obsTimeLocal":"2026-10-29T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291052Z 00000KT 10SM SCT032 11/11 A3029 RMK AO2 SLP256 T01110111","temp":11.1,"dewpoint":11.1,"humidity":100,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T11:52:00.000Z","obsTimeLocal":"2026-10-29T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291152Z 00000KT 7SM FEW033 10/10 A3029 RMK AO2 SLP256 T01000100 10128 20100 53001","temp":10,"dewpoint":10,"humidity":100,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T12:52:00.000Z","obsTimeLocal":"2026-10-29T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291252Z 00000KT 9SM CLR 13/12 A3030 RMK AO2 SLP260 T01330122","temp":13.3,"dewpoint":12.2,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T13:52:00.000Z","obsTimeLocal":"2026-10-29T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291352Z 18004KT 10SM FEW250 15/13 A3030 RMK AO2 SLP260 T01500128","temp":15,"dewpoint":12.8,"humidity":87,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T14:52:00.000Z","obsTimeLocal":"2026-10-29T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291452Z VRB04KT 10SM FEW033 17/13 A3029 RMK AO2 SLP255 T01720128 58001","temp":17.2,"dewpoint":12.8,"humidity":75,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T15:52:00.000Z","obsTimeLocal":"2026-10-29T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291552Z 18007KT 10SM FEW033 19/13 A3026 RMK AO2 SLP247 T01940128","temp":19.4,"dewpoint":12.8,"humidity":66,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T16:52:00.000Z","obsTimeLocal":"2026-10-29T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291652Z 21007KT 10SM FEW028 21/13 A3024 RMK AO2 SLP239 T02060128","temp":20.6,"dewpoint":12.8,"humidity":61,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T17:52:00.000Z","obsTimeLocal":"2026-10-29T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291752Z VRB03KT 10SM FEW028 21/12 A3021 RMK AO2 SLP230 T02110122 10217 20100 58024","temp":21.1,"dewpoint":12.2,"humidity":57,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T18:52:00.000Z","obsTimeLocal":"2026-10-29T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291852Z 00000KT 10SM FEW030 22/12 A3018 RMK AO2 SLP219 T02170117","temp":21.7,"dewpoint":11.7,"humidity":53,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T19:52:00.000Z","obsTimeLocal":"2026-10-29T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 291952Z 00000KT 10SM FEW030 23/11 A3016 RMK AO2 SLP213 T02280111","temp":22.8,"dewpoint":11.1,"humidity":48,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T20:52:00.000Z","obsTimeLocal":"2026-10-29T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 292052Z 22003KT 10SM CLR 23/12 A3015 RMK AO2 SLP209 T02280117 56020","temp":22.8,"dewpoint":11.7,"humidity":50,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T21:52:00.000Z","obsTimeLocal":"2026-10-29T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 292152Z 21003KT 10SM CLR 20/12 A3014 RMK AO2 SLP207 T02000117","temp":20,"dewpoint":11.7,"humidity":59,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T22:52:00.000Z","obsTimeLocal":"2026-10-29T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 292252Z 16005KT 10SM CLR 18/12 A3014 RMK AO2 SLP205 T01830117","temp":18.3,"dewpoint":11.7,"humidity":65,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-29T23:52:00.000Z","obsTimeLocal":"2026-10-29T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 292352Z 16004KT 10SM CLR 16/12 A3015 RMK AO2 SLP208 T01610122 10228 20161 55002","temp":16.1,"dewpoint":12.2,"humidity":78,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T00:52:00.000Z","obsTimeLocal":"2026-10-29T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300052Z 17005KT 10SM CLR 16/12 A3014 RMK AO2 SLP207 T01610122","temp":16.1,"dewpoint":12.2,"humidity":78,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T01:52:00.000Z","obsTimeLocal":"2026-10-29T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300152Z 18004KT 10SM CLR 15/12 A3013 RMK AO2 SLP204 T01500122","temp":15,"dewpoint":12.2,"humidity":83,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T02:52:00.000Z","obsTimeLocal":"2026-10-29T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300252Z 19003KT 10SM CLR 14/12 A3013 RMK AO2 SLP203 T01440117 56004","temp":14.4,"dewpoint":11.7,"humidity":84,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T03:52:00.000Z","obsTimeLocal":"2026-10-29T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300352Z 00000KT 10SM CLR 12/11 A3013 RMK AO2 SLP202 T01220111","temp":12.2,"dewpoint":11.1,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null}],"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/2026-10-29","json":"https://weathermarket.io/api/station/KIAD/2026-10-29","record":"https://weathermarket.io/api/station/KIAD/2026-10-29?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-28","next":"https://weathermarket.io/station/KIAD/2026-10-30","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=29&year2=2026&month2=10&day2=31&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=29&hora=4&anof=2026&mesf=10&dayf=30&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}