{"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":"2026-10-01","window":{"date":"2026-10-01","timezone":"America/New_York","dayStartUtc":"2026-10-01T04:00:00.000Z","dayEndUtc":"2026-10-02T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":29.4,"tmaxAt":"2026-10-01T18:52:00.000Z","tmin":16.7,"tminAt":"2026-10-01T10:52:00.000Z","tavg":22.7,"humidityMean":72.3,"windMean":2.1,"windMax":3.1,"windMaxAt":"2026-10-01T04:52:00.000Z","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":"2026-10-01T18:52:00.000Z","obsTimeLocal":"2026-10-01T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011852Z 00000KT 10SM FEW050 FEW130 SCT250 29/15 A3005 RMK AO2 SLP172 T02940150","temp":29.4,"dewpoint":15,"humidity":42,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-01T10:52:00.000Z","obsTimeLocal":"2026-10-01T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011052Z 00000KT 10SM SCT070 17/16 A3009 RMK AO2 SLP187 T01670161","temp":16.7,"dewpoint":16.1,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-01T04:52:00.000Z","obsTimeLocal":"2026-10-01T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010452Z 18006KT 10SM OVC250 19/18 A3010 RMK AO2 SLP190 T01890178 402720133","temp":18.9,"dewpoint":17.8,"humidity":93,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-02T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"984a7c648c3b3007","lastChangedAt":"2026-10-02T03:54:38.522Z","corrections":[{"obsTimeUtc":"2026-10-01T15:52:00.000Z","correctedAt":"2026-10-01T16:22:38.778Z","original":"METAR KIAD 011552Z 00000KT 10SM CLR 26/19 A3010 RMK AO2 SLP190 T02560189","corrected":"METAR KIAD 011552Z COR 00000KT 10SM FEW250 26/19 A3010 RMK AO2 SLP190 T02560189"}],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-01?format=record","status":"anchored","sha256":"2027ce7bb259bca8a795116ad7dabca04dc666c1ab7d2fa593c9a49171077fdb","revision":"984a7c648c3b3007","flareTxHash":"0xb81eff7e4c7551217415d40d39a812a39205dd9acafbeddcb3d5deeab63ffa25","flareBlock":71125512,"anchoredAt":"2026-10-02T07:01:18.509Z","explorer":"https://flare-explorer.flare.network/tx/0xb81eff7e4c7551217415d40d39a812a39205dd9acafbeddcb3d5deeab63ffa25","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":"2026-10-01T18:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-01T10:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":29.4,"tmin":16.7,"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":30,"tmin":16.11,"precip":0,"corrected":false,"issuedAt":"2026-10-02T06:27:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-01","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-01"},"observations":[{"obsTimeUtc":"2026-10-01T04:52:00.000Z","obsTimeLocal":"2026-10-01T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010452Z 18006KT 10SM OVC250 19/18 A3010 RMK AO2 SLP190 T01890178 402720133","temp":18.9,"dewpoint":17.8,"humidity":93,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T05:52:00.000Z","obsTimeLocal":"2026-10-01T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010552Z 17005KT 10SM BKN250 18/17 A3009 RMK AO2 SLP186 T01830172 10206 20178 58004","temp":18.3,"dewpoint":17.2,"humidity":93,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T06:52:00.000Z","obsTimeLocal":"2026-10-01T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010652Z 18006KT 10SM BKN250 19/17 A3008 RMK AO2 SLP184 T01890172","temp":18.9,"dewpoint":17.2,"humidity":90,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T07:52:00.000Z","obsTimeLocal":"2026-10-01T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010752Z 19004KT 10SM SCT250 18/17 A3008 RMK AO2 SLP182 T01780167","temp":17.8,"dewpoint":16.7,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T08:52:00.000Z","obsTimeLocal":"2026-10-01T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010852Z 19004KT 10SM BKN200 18/17 A3007 RMK AO2 SLP181 T01780167 56005","temp":17.8,"dewpoint":16.7,"humidity":93,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T09:52:00.000Z","obsTimeLocal":"2026-10-01T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 010952Z 00000KT 8SM CLR 17/17 A3009 RMK AO2 SLP186 T01720167","temp":17.2,"dewpoint":16.7,"humidity":97,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T10:52:00.000Z","obsTimeLocal":"2026-10-01T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011052Z 00000KT 10SM SCT070 17/16 A3009 RMK AO2 SLP187 T01670161","temp":16.7,"dewpoint":16.1,"humidity":96,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T11:52:00.000Z","obsTimeLocal":"2026-10-01T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011152Z 17003KT 10SM BKN140 BKN250 17/17 A3010 RMK AO2 SLP191 T01720167 10189 20161 51008","temp":17.2,"dewpoint":16.7,"humidity":97,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T12:52:00.000Z","obsTimeLocal":"2026-10-01T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011252Z 19004KT 10SM BKN140 BKN250 19/17 A3011 RMK AO2 SLP193 T01890172","temp":18.9,"dewpoint":17.2,"humidity":90,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T13:52:00.000Z","obsTimeLocal":"2026-10-01T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011352Z 22005KT 10SM SCT150 BKN250 21/17 A3011 RMK AO2 SLP195 T02110172","temp":21.1,"dewpoint":17.2,"humidity":78,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T14:52:00.000Z","obsTimeLocal":"2026-10-01T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011452Z 22004KT 10SM SCT160 BKN250 22/17 A3011 RMK AO2 SLP195 T02220172 51004","temp":22.2,"dewpoint":17.2,"humidity":73,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T15:52:00.000Z","obsTimeLocal":"2026-10-01T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011552Z COR 00000KT 10SM FEW250 26/19 A3010 RMK AO2 SLP190 T02560189","temp":25.6,"dewpoint":18.9,"humidity":67,"wind":0,"precipObserved":false,"correctedAt":"2026-10-01T16:22:38.778Z","originalRaw":"METAR KIAD 011552Z 00000KT 10SM CLR 26/19 A3010 RMK AO2 SLP190 T02560189"},{"obsTimeUtc":"2026-10-01T16:52:00.000Z","obsTimeLocal":"2026-10-01T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011652Z VRB03KT 10SM FEW045 FEW250 28/17 A3009 RMK AO2 SLP185 T02780172","temp":27.8,"dewpoint":17.2,"humidity":53,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T17:52:00.000Z","obsTimeLocal":"2026-10-01T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011752Z VRB05KT 10SM FEW045 FEW250 29/16 A3006 RMK AO2 SLP176 T02890161 10289 20172 58017","temp":28.9,"dewpoint":16.1,"humidity":46,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T18:52:00.000Z","obsTimeLocal":"2026-10-01T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011852Z 00000KT 10SM FEW050 FEW130 SCT250 29/15 A3005 RMK AO2 SLP172 T02940150","temp":29.4,"dewpoint":15,"humidity":42,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T19:52:00.000Z","obsTimeLocal":"2026-10-01T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 011952Z 22003KT 10SM FEW050 FEW250 29/16 A3004 RMK AO2 SLP170 T02940161","temp":29.4,"dewpoint":16.1,"humidity":45,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T20:52:00.000Z","obsTimeLocal":"2026-10-01T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 012052Z 19005KT 10SM FEW150 29/16 A3003 RMK AO2 SLP166 T02940156 56010","temp":29.4,"dewpoint":15.6,"humidity":43,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T21:52:00.000Z","obsTimeLocal":"2026-10-01T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 012152Z 19005KT 10SM FEW150 FEW250 28/16 A3003 RMK AO2 SLP166 T02830161","temp":28.3,"dewpoint":16.1,"humidity":48,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T22:52:00.000Z","obsTimeLocal":"2026-10-01T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 012252Z 19005KT 10SM FEW150 SCT250 26/16 A3004 RMK AO2 SLP169 T02610161","temp":26.1,"dewpoint":16.1,"humidity":54,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-01T23:52:00.000Z","obsTimeLocal":"2026-10-01T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 012352Z 17006KT 10SM FEW150 BKN250 25/17 A3004 RMK AO2 SLP172 T02500167 10300 20244 53004","temp":25,"dewpoint":16.7,"humidity":60,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-02T00:52:00.000Z","obsTimeLocal":"2026-10-01T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 020052Z 18006KT 10SM FEW150 SCT250 24/17 A3005 RMK AO2 SLP172 T02440167","temp":24.4,"dewpoint":16.7,"humidity":62,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-02T01:52:00.000Z","obsTimeLocal":"2026-10-01T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 020152Z 20006KT 10SM FEW150 23/17 A3004 RMK AO2 SLP170 T02280172","temp":22.8,"dewpoint":17.2,"humidity":71,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-02T02:52:00.000Z","obsTimeLocal":"2026-10-01T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 020252Z 20005KT 10SM FEW150 21/17 A3004 RMK AO2 SLP168 T02110167 58002","temp":21.1,"dewpoint":16.7,"humidity":76,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-02T03:52:00.000Z","obsTimeLocal":"2026-10-01T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 020352Z 18006KT 10SM FEW150 21/17 A3003 RMK AO2 SLP165 T02110167","temp":21.1,"dewpoint":16.7,"humidity":76,"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/2026-10-01","json":"https://weathermarket.io/api/station/KIAD/2026-10-01","record":"https://weathermarket.io/api/station/KIAD/2026-10-01?format=record","prev":"https://weathermarket.io/station/KIAD/2026-09-30","next":"https://weathermarket.io/station/KIAD/2026-10-02","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=1&year2=2026&month2=10&day2=3&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=1&hora=4&anof=2026&mesf=10&dayf=2&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}