{"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":"2026-10-19","window":{"date":"2026-10-19","timezone":"America/New_York","dayStartUtc":"2026-10-19T04:00:00.000Z","dayEndUtc":"2026-10-20T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":19.4,"tmaxAt":"2026-10-19T19:52:00.000Z","tmin":2.8,"tminAt":"2026-10-19T09:52:00.000Z","tavg":11.1,"humidityMean":59.2,"windMean":2.6,"windMax":5.1,"windMaxAt":"2026-10-19T16:52:00.000Z","precipObservedCount":0,"nObservations":24,"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":"2026-10-19T19:52:00.000Z","obsTimeLocal":"2026-10-19T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191952Z 35010KT 10SM CLR 19/01 A3034 RMK AO2 SLP273 T01940011","temp":19.4,"dewpoint":1.1,"humidity":29,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-19T09:52:00.000Z","obsTimeLocal":"2026-10-19T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190952Z 00000KT 10SM CLR 03/02 A3048 RMK AO2 SLP321 T00280017 $","temp":2.8,"dewpoint":1.7,"humidity":92,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-19T16:52:00.000Z","obsTimeLocal":"2026-10-19T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191652Z 35010KT 10SM CLR 17/01 A3041 RMK AO2 SLP299 T01720006","temp":17.2,"dewpoint":0.6,"humidity":33,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-20T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"06a2224f1c678ab0","lastChangedAt":"2026-10-20T03:55:24.574Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-19?format=record","status":"anchored","sha256":"d2d7f416e04ea710da3409f24501312974c76155148d87ab05c095fd978b8fce","revision":"06a2224f1c678ab0","flareTxHash":"0x5dadd198ab02b1208dd3cedbddcce22c8add2ebc9a96a8f820058fbc7ac6763d","flareBlock":72538083,"anchoredAt":"2026-10-20T07:02:08.709Z","explorer":"https://flare-explorer.flare.network/tx/0x5dadd198ab02b1208dd3cedbddcce22c8add2ebc9a96a8f820058fbc7ac6763d","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":24,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-19T19:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-19T09:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":19.4,"tmin":2.8,"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":20,"tmin":2.22,"precip":0,"corrected":false,"issuedAt":"2026-10-20T06:21:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-19","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-19"},"observations":[{"obsTimeUtc":"2026-10-19T04:52:00.000Z","obsTimeLocal":"2026-10-19T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190452Z 00000KT 10SM CLR 04/03 A3051 RMK AO2 SLP332 T00390028 401670028 $","temp":3.9,"dewpoint":2.8,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T05:52:00.000Z","obsTimeLocal":"2026-10-19T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190552Z 29003KT 10SM CLR 03/02 A3050 RMK AO2 SLP329 T00330022 10089 20033 58008 $","temp":3.3,"dewpoint":2.2,"humidity":92,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T06:52:00.000Z","obsTimeLocal":"2026-10-19T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190652Z 33003KT 10SM CLR 04/02 A3049 RMK AO2 SLP326 T00390022 $","temp":3.9,"dewpoint":2.2,"humidity":89,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T07:52:00.000Z","obsTimeLocal":"2026-10-19T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190752Z 31003KT 10SM CLR 04/02 A3048 RMK AO2 SLP323 T00440017 $","temp":4.4,"dewpoint":1.7,"humidity":83,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T08:52:00.000Z","obsTimeLocal":"2026-10-19T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190852Z 33004KT 10SM CLR 04/02 A3048 RMK AO2 SLP322 T00440017 56007 $","temp":4.4,"dewpoint":1.7,"humidity":83,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T09:52:00.000Z","obsTimeLocal":"2026-10-19T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 190952Z 00000KT 10SM CLR 03/02 A3048 RMK AO2 SLP321 T00280017 $","temp":2.8,"dewpoint":1.7,"humidity":92,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T10:52:00.000Z","obsTimeLocal":"2026-10-19T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191052Z 31005KT 10SM CLR 04/02 A3047 RMK AO2 SLP319 T00390017 $","temp":3.9,"dewpoint":1.7,"humidity":86,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T11:52:00.000Z","obsTimeLocal":"2026-10-19T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191152Z 32005KT 10SM CLR 04/02 A3047 RMK AO2 SLP321 T00440017 10050 20022 55002 $","temp":4.4,"dewpoint":1.7,"humidity":83,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T12:52:00.000Z","obsTimeLocal":"2026-10-19T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191252Z 32005KT 10SM CLR 07/03 A3048 RMK AO2 SLP323 T00720028 $","temp":7.2,"dewpoint":2.8,"humidity":74,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T13:52:00.000Z","obsTimeLocal":"2026-10-19T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191352Z 32005KT 10SM CLR 10/02 A3049 RMK AO2 SLP325 T01000022 $","temp":10,"dewpoint":2.2,"humidity":58,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T14:52:00.000Z","obsTimeLocal":"2026-10-19T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191452Z 33007KT 10SM CLR 13/03 A3047 RMK AO2 SLP318 T01330028 58001","temp":13.3,"dewpoint":2.8,"humidity":49,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T15:52:00.000Z","obsTimeLocal":"2026-10-19T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191552Z 35007KT 10SM CLR 16/02 A3044 RMK AO2 SLP309 T01610017","temp":16.1,"dewpoint":1.7,"humidity":38,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T16:52:00.000Z","obsTimeLocal":"2026-10-19T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191652Z 35010KT 10SM CLR 17/01 A3041 RMK AO2 SLP299 T01720006","temp":17.2,"dewpoint":0.6,"humidity":33,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T17:52:00.000Z","obsTimeLocal":"2026-10-19T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191752Z 35008KT 10SM CLR 18/01 A3038 RMK AO2 SLP287 T01830011 10183 20044 58031","temp":18.3,"dewpoint":1.1,"humidity":32,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T18:52:00.000Z","obsTimeLocal":"2026-10-19T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191852Z 34007KT 310V020 10SM CLR 19/01 A3035 RMK AO2 SLP277 T01890006","temp":18.9,"dewpoint":0.6,"humidity":29,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T19:52:00.000Z","obsTimeLocal":"2026-10-19T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 191952Z 35010KT 10SM CLR 19/01 A3034 RMK AO2 SLP273 T01940011","temp":19.4,"dewpoint":1.1,"humidity":29,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T20:52:00.000Z","obsTimeLocal":"2026-10-19T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 192052Z 36008KT 10SM CLR 19/01 A3032 RMK AO2 SLP266 T01940006 56021","temp":19.4,"dewpoint":0.6,"humidity":28,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T21:52:00.000Z","obsTimeLocal":"2026-10-19T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 192152Z 32008KT 10SM CLR 18/03 A3030 RMK AO2 SLP262 T01830033","temp":18.3,"dewpoint":3.3,"humidity":37,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T22:52:00.000Z","obsTimeLocal":"2026-10-19T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 192252Z 33004KT 10SM CLR 16/04 A3030 RMK AO2 SLP259 T01610039","temp":16.1,"dewpoint":3.9,"humidity":44,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-19T23:52:00.000Z","obsTimeLocal":"2026-10-19T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 192352Z 33004KT 10SM CLR 14/04 A3029 RMK AO2 SLP257 T01440044 10200 20144 56009","temp":14.4,"dewpoint":4.4,"humidity":51,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-20T00:52:00.000Z","obsTimeLocal":"2026-10-19T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 200052Z 33004KT 10SM CLR 13/04 A3028 RMK AO2 SLP255 T01330039","temp":13.3,"dewpoint":3.9,"humidity":53,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-20T01:52:00.000Z","obsTimeLocal":"2026-10-19T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 200152Z 32004KT 10SM CLR 12/03 A3027 RMK AO2 SLP251 T01220033","temp":12.2,"dewpoint":3.3,"humidity":55,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-20T02:52:00.000Z","obsTimeLocal":"2026-10-19T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 200252Z 31004KT 10SM CLR 12/03 A3026 RMK AO2 SLP248 T01170028 56008","temp":11.7,"dewpoint":2.8,"humidity":54,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-20T03:52:00.000Z","obsTimeLocal":"2026-10-19T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 200352Z 31005KT 10SM CLR 11/02 A3026 RMK AO2 SLP246 T01060022","temp":10.6,"dewpoint":2.2,"humidity":56,"wind":2.6,"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/2026-10-19","json":"https://weathermarket.io/api/station/KIAD/2026-10-19","record":"https://weathermarket.io/api/station/KIAD/2026-10-19?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-18","next":"https://weathermarket.io/station/KIAD/2026-10-20","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=19&year2=2026&month2=10&day2=21&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=19&hora=4&anof=2026&mesf=10&dayf=20&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}