{"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":"2026-10-21","window":{"date":"2026-10-21","timezone":"America/New_York","dayStartUtc":"2026-10-21T04:00:00.000Z","dayEndUtc":"2026-10-22T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":19.4,"tmaxAt":"2026-10-21T19:52:00.000Z","tmin":6.7,"tminAt":"2026-10-21T08:52:00.000Z","tavg":13.1,"humidityMean":52.9,"windMean":2.8,"windMax":5.1,"windMaxAt":"2026-10-21T17:52:00.000Z","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":"2026-10-21T19:52:00.000Z","obsTimeLocal":"2026-10-21T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211952Z 32007KT 10SM FEW250 19/04 A3014 RMK AO2 SLP205 T01940039","temp":19.4,"dewpoint":3.9,"humidity":36,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-21T08:52:00.000Z","obsTimeLocal":"2026-10-21T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210852Z 00000KT 10SM CLR 07/03 A3024 RMK AO2 SLP238 T00670033 55001 $","temp":6.7,"dewpoint":3.3,"humidity":79,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-21T17:52:00.000Z","obsTimeLocal":"2026-10-21T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211752Z 36010G17KT 10SM FEW060 FEW250 18/02 A3019 RMK AO2 SLP221 T01780017 10183 20106 58027","temp":17.8,"dewpoint":1.7,"humidity":34,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-22T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"229a1f8ea1b4f188","lastChangedAt":"2026-10-22T03:55:38.549Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-21?format=record","status":"anchored","sha256":"f21ae619fe84ab18c17914bd15e82729c9dd4620f82486ff67f27855267fecd9","revision":"229a1f8ea1b4f188","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":24,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-21T19:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-21T08:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":19.4,"tmin":6.7,"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":19.44,"tmin":5.56,"precip":0,"corrected":false,"issuedAt":"2026-10-22T06:24:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-21","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-21"},"observations":[{"obsTimeUtc":"2026-10-21T04:52:00.000Z","obsTimeLocal":"2026-10-21T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210452Z 33003KT 10SM CLR 13/03 A3024 RMK AO2 SLP239 T01330033 402170056 $","temp":13.3,"dewpoint":3.3,"humidity":51,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T05:52:00.000Z","obsTimeLocal":"2026-10-21T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210552Z 01005KT 10SM CLR 12/03 A3024 RMK AO2 SLP239 T01220033 10178 20072 56001 $","temp":12.2,"dewpoint":3.3,"humidity":55,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T06:52:00.000Z","obsTimeLocal":"2026-10-21T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210652Z 29003KT 10SM CLR 09/04 A3024 RMK AO2 SLP240 T00890039 $","temp":8.9,"dewpoint":3.9,"humidity":71,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T07:52:00.000Z","obsTimeLocal":"2026-10-21T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210752Z 00000KT 10SM CLR 07/03 A3023 RMK AO2 SLP236 T00720033 $","temp":7.2,"dewpoint":3.3,"humidity":76,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T08:52:00.000Z","obsTimeLocal":"2026-10-21T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210852Z 00000KT 10SM CLR 07/03 A3024 RMK AO2 SLP238 T00670033 55001 $","temp":6.7,"dewpoint":3.3,"humidity":79,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T09:52:00.000Z","obsTimeLocal":"2026-10-21T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 210952Z 36005KT 10SM CLR 11/03 A3026 RMK AO2 SLP245 T01060033 $","temp":10.6,"dewpoint":3.3,"humidity":61,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T10:52:00.000Z","obsTimeLocal":"2026-10-21T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211052Z 36007KT 10SM CLR 11/03 A3026 RMK AO2 SLP247 T01060033 $","temp":10.6,"dewpoint":3.3,"humidity":61,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T11:52:00.000Z","obsTimeLocal":"2026-10-21T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211152Z 36007KT 10SM CLR 11/03 A3027 RMK AO2 SLP248 T01060033 10122 20056 51010","temp":10.6,"dewpoint":3.3,"humidity":61,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T12:52:00.000Z","obsTimeLocal":"2026-10-21T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211252Z 35009KT 10SM FEW060 12/03 A3028 RMK AO2 SLP253 T01170033","temp":11.7,"dewpoint":3.3,"humidity":56,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T13:52:00.000Z","obsTimeLocal":"2026-10-21T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211352Z 01007KT 7SM FEW080 13/03 A3028 RMK AO2 SLP252 T01330033","temp":13.3,"dewpoint":3.3,"humidity":51,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T14:52:00.000Z","obsTimeLocal":"2026-10-21T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211452Z 01008KT 10SM FEW080 14/03 A3027 RMK AO2 SLP249 T01440028 50000","temp":14.4,"dewpoint":2.8,"humidity":46,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T15:52:00.000Z","obsTimeLocal":"2026-10-21T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211552Z 36007KT 10SM FEW065 16/03 A3025 RMK AO2 SLP243 T01610033","temp":16.1,"dewpoint":3.3,"humidity":42,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T16:52:00.000Z","obsTimeLocal":"2026-10-21T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211652Z 36009KT 10SM FEW060 17/02 A3022 RMK AO2 SLP232 T01720022","temp":17.2,"dewpoint":2.2,"humidity":37,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T17:52:00.000Z","obsTimeLocal":"2026-10-21T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211752Z 36010G17KT 10SM FEW060 FEW250 18/02 A3019 RMK AO2 SLP221 T01780017 10183 20106 58027","temp":17.8,"dewpoint":1.7,"humidity":34,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T18:52:00.000Z","obsTimeLocal":"2026-10-21T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211852Z 35009KT 9SM FEW065 FEW250 19/02 A3016 RMK AO2 SLP211 T01890022","temp":18.9,"dewpoint":2.2,"humidity":33,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T19:52:00.000Z","obsTimeLocal":"2026-10-21T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 211952Z 32007KT 10SM FEW250 19/04 A3014 RMK AO2 SLP205 T01940039","temp":19.4,"dewpoint":3.9,"humidity":36,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T20:52:00.000Z","obsTimeLocal":"2026-10-21T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 212052Z 33009KT 10SM CLR 19/03 A3013 RMK AO2 SLP202 T01890033 56020","temp":18.9,"dewpoint":3.3,"humidity":36,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T21:52:00.000Z","obsTimeLocal":"2026-10-21T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 212152Z 32007KT 10SM FEW250 18/03 A3013 RMK AO2 SLP201 T01780028 $","temp":17.8,"dewpoint":2.8,"humidity":37,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T22:52:00.000Z","obsTimeLocal":"2026-10-21T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 212252Z 33005KT 10SM FEW120 FEW250 16/03 A3013 RMK AO2 SLP201 T01560033 $","temp":15.6,"dewpoint":3.3,"humidity":44,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-21T23:52:00.000Z","obsTimeLocal":"2026-10-21T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 212352Z 02005KT 10SM CLR 13/03 A3014 RMK AO2 SLP206 T01330033 10194 20133 53003 $","temp":13.3,"dewpoint":3.3,"humidity":51,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-22T00:52:00.000Z","obsTimeLocal":"2026-10-21T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 220052Z 02007KT 10SM CLR 14/03 A3013 RMK AO2 SLP203 T01390028 $","temp":13.9,"dewpoint":2.8,"humidity":47,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-22T01:52:00.000Z","obsTimeLocal":"2026-10-21T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 220152Z 00000KT 10SM CLR 10/03 A3013 RMK AO2 SLP203 T01000033 $","temp":10,"dewpoint":3.3,"humidity":63,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-22T02:52:00.000Z","obsTimeLocal":"2026-10-21T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 220252Z 00000KT 10SM CLR 09/03 A3013 RMK AO2 SLP203 T00890033 56003 $","temp":8.9,"dewpoint":3.3,"humidity":68,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-22T03:52:00.000Z","obsTimeLocal":"2026-10-21T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 220352Z 00000KT 10SM CLR 08/03 A3012 RMK AO2 SLP199 T00780033 $","temp":7.8,"dewpoint":3.3,"humidity":73,"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/2026-10-21","json":"https://weathermarket.io/api/station/KIAD/2026-10-21","record":"https://weathermarket.io/api/station/KIAD/2026-10-21?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-20","next":"https://weathermarket.io/station/KIAD/2026-10-22","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=21&year2=2026&month2=10&day2=23&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=21&hora=4&anof=2026&mesf=10&dayf=22&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}