{"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":"2026-10-30","window":{"date":"2026-10-30","timezone":"America/New_York","dayStartUtc":"2026-10-30T04:00:00.000Z","dayEndUtc":"2026-10-31T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":23.9,"tmaxAt":"2026-10-30T17:52:00.000Z","tmin":10,"tminAt":"2026-10-30T08:52:00.000Z","tavg":16.8,"humidityMean":59.5,"windMean":3.9,"windMax":9.3,"windMaxAt":"2026-10-30T14:52:00.000Z","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":"2026-10-30T17:52:00.000Z","obsTimeLocal":"2026-10-30T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301752Z 30013G24KT 5SM BLDU FEW055 24/04 A3013 RMK AO2 PK WND 33026/1733 SLP199 T02390044 10244 20106 58001","temp":23.9,"dewpoint":4.4,"humidity":28,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-30T08:52:00.000Z","obsTimeLocal":"2026-10-30T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300852Z 18004KT 10SM CLR 10/09 A3010 RMK AO2 SLP192 T01000094 58007","temp":10,"dewpoint":9.4,"humidity":96,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-30T14:52:00.000Z","obsTimeLocal":"2026-10-30T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301452Z 29018G27KT 6SM BLDU CLR 22/11 A3013 RMK AO2 PK WND 30028/1441 SLP200 T02220106 50002","temp":22.2,"dewpoint":10.6,"humidity":48,"wind":9.3,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-31T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"a02805764dd698a7","lastChangedAt":"2026-10-31T03:55:19.435Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-30?format=record","status":"anchored","sha256":"1c7e2100478769d8e1a1d6345b0146332bc92c8137dc8a973766bafced1fd013","revision":"a02805764dd698a7","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":23,"suspect":1,"bad":0,"flagged":[{"obsTimeUtc":"2026-10-30T13:52:00.000Z","flag":"suspect","reasons":["step: temperature changed 6.1 C in 60 min (> 5)"]}]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-30T17:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-30T08:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":23.9,"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":24.44,"tmin":10,"precip":0,"corrected":false,"issuedAt":"2026-10-31T06:27:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-30","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-30"},"observations":[{"obsTimeUtc":"2026-10-30T04:52:00.000Z","obsTimeLocal":"2026-10-30T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300452Z 13003KT 10SM CLR 12/11 A3013 RMK AO2 SLP202 T01170111 402280100","temp":11.7,"dewpoint":11.1,"humidity":96,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T05:52:00.000Z","obsTimeLocal":"2026-10-30T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300552Z 00000KT 10SM CLR 12/11 A3012 RMK AO2 SLP199 T01220111 10172 20111 58004","temp":12.2,"dewpoint":11.1,"humidity":93,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T06:52:00.000Z","obsTimeLocal":"2026-10-30T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300652Z 00000KT 10SM CLR 11/10 A3012 RMK AO2 SLP197 T01060100","temp":10.6,"dewpoint":10,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T07:52:00.000Z","obsTimeLocal":"2026-10-30T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300752Z 20004KT 10SM CLR 12/11 A3011 RMK AO2 SLP193 T01170106","temp":11.7,"dewpoint":10.6,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T08:52:00.000Z","obsTimeLocal":"2026-10-30T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300852Z 18004KT 10SM CLR 10/09 A3010 RMK AO2 SLP192 T01000094 58007","temp":10,"dewpoint":9.4,"humidity":96,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T09:52:00.000Z","obsTimeLocal":"2026-10-30T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 300952Z 19003KT 9SM SCT080 11/10 A3011 RMK AO2 SLP194 T01060100","temp":10.6,"dewpoint":10,"humidity":96,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T10:52:00.000Z","obsTimeLocal":"2026-10-30T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301052Z 20003KT 10SM SCT110 11/11 A3011 RMK AO2 SLP197 T01110106","temp":11.1,"dewpoint":10.6,"humidity":97,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T11:52:00.000Z","obsTimeLocal":"2026-10-30T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301152Z 19003KT 9SM FEW110 11/10 A3012 RMK AO2 SLP199 T01110100 10122 20100 53007","temp":11.1,"dewpoint":10,"humidity":93,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T12:52:00.000Z","obsTimeLocal":"2026-10-30T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301252Z 21003KT 10SM FEW110 14/12 A3014 RMK AO2 SLP204 T01390117","temp":13.9,"dewpoint":11.7,"humidity":87,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T13:52:00.000Z","obsTimeLocal":"2026-10-30T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301352Z 30005KT 10SM CLR 20/12 A3014 RMK AO2 SLP204 T02000117","temp":20,"dewpoint":11.7,"humidity":59,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T14:52:00.000Z","obsTimeLocal":"2026-10-30T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301452Z 29018G27KT 6SM BLDU CLR 22/11 A3013 RMK AO2 PK WND 30028/1441 SLP200 T02220106 50002","temp":22.2,"dewpoint":10.6,"humidity":48,"wind":9.3,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T15:52:00.000Z","obsTimeLocal":"2026-10-30T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301552Z 31013G24KT 9SM FEW030 22/09 A3016 RMK AO2 PK WND 29027/1541 SLP210 T02220094","temp":22.2,"dewpoint":9.4,"humidity":44,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T16:52:00.000Z","obsTimeLocal":"2026-10-30T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301652Z 30011G19KT 8SM FEW055 23/08 A3014 RMK AO2 SLP206 T02330083","temp":23.3,"dewpoint":8.3,"humidity":38,"wind":5.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T17:52:00.000Z","obsTimeLocal":"2026-10-30T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301752Z 30013G24KT 5SM BLDU FEW055 24/04 A3013 RMK AO2 PK WND 33026/1733 SLP199 T02390044 10244 20106 58001","temp":23.9,"dewpoint":4.4,"humidity":28,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T18:52:00.000Z","obsTimeLocal":"2026-10-30T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301852Z 31010G18KT 10SM FEW055 FEW250 24/04 A3012 RMK AO2 PK WND 34028/1805 SLP198 T02390044","temp":23.9,"dewpoint":4.4,"humidity":28,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T19:52:00.000Z","obsTimeLocal":"2026-10-30T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 301952Z 30011G22KT 10SM FEW250 24/02 A3013 RMK AO2 SLP202 T02390017","temp":23.9,"dewpoint":1.7,"humidity":23,"wind":5.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T20:52:00.000Z","obsTimeLocal":"2026-10-30T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 302052Z 35012KT 10SM FEW250 23/03 A3016 RMK AO2 SLP211 T02280033 53010","temp":22.8,"dewpoint":3.3,"humidity":28,"wind":6.2,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T21:52:00.000Z","obsTimeLocal":"2026-10-30T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 302152Z 33014G20KT 10SM FEW050 21/04 A3018 RMK AO2 SLP220 T02060039","temp":20.6,"dewpoint":3.9,"humidity":33,"wind":7.2,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T22:52:00.000Z","obsTimeLocal":"2026-10-30T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 302252Z 34009KT 10SM FEW050 FEW250 18/03 A3023 RMK AO2 SLP235 T01830033","temp":18.3,"dewpoint":3.3,"humidity":37,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-30T23:52:00.000Z","obsTimeLocal":"2026-10-30T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 302352Z 34012KT 10SM FEW250 18/03 A3026 RMK AO2 SLP245 T01780028 10244 20178 51033","temp":17.8,"dewpoint":2.8,"humidity":37,"wind":6.2,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-31T00:52:00.000Z","obsTimeLocal":"2026-10-30T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 310052Z 35009KT 10SM FEW250 16/03 A3028 RMK AO2 SLP253 T01610033","temp":16.1,"dewpoint":3.3,"humidity":42,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-31T01:52:00.000Z","obsTimeLocal":"2026-10-30T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 310152Z 34009KT 10SM FEW250 16/03 A3030 RMK AO2 SLP260 T01610028","temp":16.1,"dewpoint":2.8,"humidity":41,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-31T02:52:00.000Z","obsTimeLocal":"2026-10-30T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 310252Z 35007KT 10SM FEW250 15/03 A3032 RMK AO2 SLP266 T01500033 51022","temp":15,"dewpoint":3.3,"humidity":45,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-31T03:52:00.000Z","obsTimeLocal":"2026-10-30T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 310352Z 34006KT 10SM FEW250 14/03 A3033 RMK AO2 SLP270 T01390033","temp":13.9,"dewpoint":3.3,"humidity":49,"wind":3.1,"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/2026-10-30","json":"https://weathermarket.io/api/station/KIAD/2026-10-30","record":"https://weathermarket.io/api/station/KIAD/2026-10-30?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-29","next":"https://weathermarket.io/station/KIAD/2026-10-31","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=30&year2=2026&month2=11&day2=1&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=30&hora=4&anof=2026&mesf=10&dayf=31&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}