{"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":"2026-10-27","window":{"date":"2026-10-27","timezone":"America/New_York","dayStartUtc":"2026-10-27T04:00:00.000Z","dayEndUtc":"2026-10-28T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":22.2,"tmaxAt":"2026-10-27T20:52:00.000Z","tmin":7.2,"tminAt":"2026-10-27T07:52:00.000Z","tavg":13.9,"humidityMean":75.1,"windMean":0.9,"windMax":2.6,"windMaxAt":"2026-10-27T14:52:00.000Z","precipObservedCount":0,"nObservations":23,"maxGapMinutes":120,"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":"2026-10-27T20:52:00.000Z","obsTimeLocal":"2026-10-27T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 272052Z 00000KT 10SM FEW250 22/10 A3031 RMK AO2 SLP262 T02220100 56007","temp":22.2,"dewpoint":10,"humidity":46,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-27T07:52:00.000Z","obsTimeLocal":"2026-10-27T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270752Z 00000KT 10SM CLR 07/07 A3025 RMK AO2 SLP242 T00720067","temp":7.2,"dewpoint":6.7,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-27T14:52:00.000Z","obsTimeLocal":"2026-10-27T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271452Z 36005KT 10SM CLR 18/09 A3037 RMK AO2 SLP282 T01780089 51015","temp":17.8,"dewpoint":8.9,"humidity":56,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-28T07:00:00.000Z","settleable":false,"coverage":{"ok":false,"maxGapMinutes":120,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":["coverage_gap: longest stretch without a report was 120 min, above 90 min (station normal interval 60 + 30)"],"holdHours":3},"revision":"d40c8e48bd5abd1d","lastChangedAt":"2026-10-28T03:54:39.004Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-27?format=record","status":"anchored","sha256":"822deebaad4af3326a6b08486c57e243613992df5b9a4faaa26d6b31fd855a53","revision":"d40c8e48bd5abd1d","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":22,"suspect":1,"bad":0,"flagged":[{"obsTimeUtc":"2026-10-27T12:52:00.000Z","flag":"suspect","reasons":["step: temperature changed 5 C in 60 min (> 5)"]}]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-27T20:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-27T07:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":22.2,"tmin":7.2,"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":22.22,"tmin":6.67,"precip":0,"corrected":false,"issuedAt":"2026-10-28T06:22:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-27","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-27"},"observations":[{"obsTimeUtc":"2026-10-27T04:52:00.000Z","obsTimeLocal":"2026-10-27T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270452Z 00000KT 10SM FEW250 08/07 A3025 RMK AO2 SLP241 T00830072 402170033","temp":8.3,"dewpoint":7.2,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T05:52:00.000Z","obsTimeLocal":"2026-10-27T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270552Z 19003KT 10SM FEW250 08/07 A3025 RMK AO2 SLP242 T00830072 10122 20078 51001","temp":8.3,"dewpoint":7.2,"humidity":93,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T06:52:00.000Z","obsTimeLocal":"2026-10-27T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270652Z 00000KT 10SM CLR 08/07 A3024 RMK AO2 SLP241 T00780072","temp":7.8,"dewpoint":7.2,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T07:52:00.000Z","obsTimeLocal":"2026-10-27T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270752Z 00000KT 10SM CLR 07/07 A3025 RMK AO2 SLP242 T00720067","temp":7.2,"dewpoint":6.7,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T08:52:00.000Z","obsTimeLocal":"2026-10-27T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270852Z 00000KT 10SM CLR 07/07 A3026 RMK AO2 SLP247 T00720067 53005","temp":7.2,"dewpoint":6.7,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T09:52:00.000Z","obsTimeLocal":"2026-10-27T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 270952Z 00000KT 10SM CLR 07/06 A3028 RMK AO2 SLP252 T00720061","temp":7.2,"dewpoint":6.1,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T10:52:00.000Z","obsTimeLocal":"2026-10-27T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271052Z 05004KT 10SM CLR 08/07 A3029 RMK AO2 SLP259 T00780067","temp":7.8,"dewpoint":6.7,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T11:52:00.000Z","obsTimeLocal":"2026-10-27T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271152Z 00000KT 9SM CLR 08/07 A3032 RMK AO2 SLP268 T00780067 10089 20067 53020","temp":7.8,"dewpoint":6.7,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T12:52:00.000Z","obsTimeLocal":"2026-10-27T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271252Z 05004KT 9SM CLR 13/09 A3036 RMK AO2 SLP279 T01280094","temp":12.8,"dewpoint":9.4,"humidity":80,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T14:52:00.000Z","obsTimeLocal":"2026-10-27T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271452Z 36005KT 10SM CLR 18/09 A3037 RMK AO2 SLP282 T01780089 51015","temp":17.8,"dewpoint":8.9,"humidity":56,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T15:52:00.000Z","obsTimeLocal":"2026-10-27T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271552Z 04005KT 10SM CLR 19/09 A3036 RMK AO2 SLP281 T01940094","temp":19.4,"dewpoint":9.4,"humidity":52,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T16:52:00.000Z","obsTimeLocal":"2026-10-27T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271652Z 02005KT 10SM CLR 20/09 A3035 RMK AO2 SLP277 T02000094","temp":20,"dewpoint":9.4,"humidity":50,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T17:52:00.000Z","obsTimeLocal":"2026-10-27T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271752Z 00000KT 10SM CLR 21/10 A3033 RMK AO2 SLP270 T02110100 10211 20072 58012","temp":21.1,"dewpoint":10,"humidity":49,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T18:52:00.000Z","obsTimeLocal":"2026-10-27T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271852Z VRB04KT 10SM CLR 22/10 A3032 RMK AO2 SLP265 T02170100","temp":21.7,"dewpoint":10,"humidity":47,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T19:52:00.000Z","obsTimeLocal":"2026-10-27T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 271952Z VRB03KT 10SM CLR 22/10 A3031 RMK AO2 SLP263 T02170100","temp":21.7,"dewpoint":10,"humidity":47,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T20:52:00.000Z","obsTimeLocal":"2026-10-27T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 272052Z 00000KT 10SM FEW250 22/10 A3031 RMK AO2 SLP262 T02220100 56007","temp":22.2,"dewpoint":10,"humidity":46,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T21:52:00.000Z","obsTimeLocal":"2026-10-27T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 272152Z 00000KT 10SM FEW250 21/10 A3031 RMK AO2 SLP263 T02060100","temp":20.6,"dewpoint":10,"humidity":51,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T22:52:00.000Z","obsTimeLocal":"2026-10-27T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 272252Z 09003KT 10SM FEW250 16/11 A3031 RMK AO2 SLP265 T01610111","temp":16.1,"dewpoint":11.1,"humidity":72,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-27T23:52:00.000Z","obsTimeLocal":"2026-10-27T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 272352Z 00000KT 10SM CLR 15/11 A3032 RMK AO2 SLP269 T01500111 10222 20144 53005","temp":15,"dewpoint":11.1,"humidity":78,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T00:52:00.000Z","obsTimeLocal":"2026-10-27T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280052Z 11003KT 10SM CLR 15/11 A3033 RMK AO2 SLP270 T01500106","temp":15,"dewpoint":10.6,"humidity":75,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T01:52:00.000Z","obsTimeLocal":"2026-10-27T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280152Z 00000KT 10SM CLR 13/10 A3034 RMK AO2 SLP275 T01330100","temp":13.3,"dewpoint":10,"humidity":80,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T02:52:00.000Z","obsTimeLocal":"2026-10-27T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280252Z 00000KT 10SM CLR 11/10 A3036 RMK AO2 SLP281 T01110100 53013","temp":11.1,"dewpoint":10,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-28T03:52:00.000Z","obsTimeLocal":"2026-10-27T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 280352Z 11003KT 10SM CLR 10/09 A3037 RMK AO2 SLP284 T01000094 $","temp":10,"dewpoint":9.4,"humidity":96,"wind":1.5,"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/2026-10-27","json":"https://weathermarket.io/api/station/KIAD/2026-10-27","record":"https://weathermarket.io/api/station/KIAD/2026-10-27?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-26","next":"https://weathermarket.io/station/KIAD/2026-10-28","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=27&year2=2026&month2=10&day2=29&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=27&hora=4&anof=2026&mesf=10&dayf=28&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}