{"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":"2026-10-03","window":{"date":"2026-10-03","timezone":"America/New_York","dayStartUtc":"2026-10-03T04:00:00.000Z","dayEndUtc":"2026-10-04T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":20,"tmaxAt":"2026-10-03T04:52:00.000Z","tmin":14.4,"tminAt":"2026-10-03T13:52:00.000Z","tavg":16.5,"humidityMean":76,"windMean":2.2,"windMax":6.7,"windMaxAt":"2026-10-03T07:52:00.000Z","precipObservedCount":8,"nObservations":25,"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":"2026-10-03T04:52:00.000Z","obsTimeLocal":"2026-10-03T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030452Z 02006KT 10SM -RA SCT055 SCT070 OVC090 20/17 A3010 RMK AO2 SLP189 P0004 T02000172 403170156 $","temp":20,"dewpoint":17.2,"humidity":84,"wind":3.1,"precipObserved":true,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-03T13:52:00.000Z","obsTimeLocal":"2026-10-03T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031352Z 36007KT 10SM -RA FEW040 SCT070 BKN110 OVC140 14/11 A3025 RMK AO2 SLP241 P0002 T01440106 $","temp":14.4,"dewpoint":10.6,"humidity":78,"wind":3.6,"precipObserved":true,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-03T07:52:00.000Z","obsTimeLocal":"2026-10-03T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030752Z 02013G24KT 9SM -RA FEW023 BKN031 OVC060 17/11 A3013 RMK AO2 RAB06 SLP199 P0005 T01670111 $","temp":16.7,"dewpoint":11.1,"humidity":70,"wind":6.7,"precipObserved":true,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-04T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"c28b9b526cbb5756","lastChangedAt":"2026-10-04T03:54:41.317Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-03?format=record","status":"anchored","sha256":"179122f2bae04c8d0ffea36d2b288b75f286e8aa6b3fc8e7509c8d58806e919b","revision":"c28b9b526cbb5756","flareTxHash":"0x8fde11b4e9776b4ddf938f9f1f28aee4ac481531ea312cbaea26e516c150267d","flareBlock":71282132,"anchoredAt":"2026-10-04T07:01:07.444Z","explorer":"https://flare-explorer.flare.network/tx/0x8fde11b4e9776b4ddf938f9f1f28aee4ac481531ea312cbaea26e516c150267d","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":25,"suspect":0,"bad":0,"flagged":[]},"extremes":{"tmax":{"obsTimeUtc":"2026-10-03T04:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-03T13:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":20,"tmin":14.4,"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":13.89,"precip":2.29,"corrected":false,"issuedAt":"2026-10-04T06:32:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-03","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-03"},"observations":[{"obsTimeUtc":"2026-10-03T04:52:00.000Z","obsTimeLocal":"2026-10-03T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030452Z 02006KT 10SM -RA SCT055 SCT070 OVC090 20/17 A3010 RMK AO2 SLP189 P0004 T02000172 403170156 $","temp":20,"dewpoint":17.2,"humidity":84,"wind":3.1,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T05:52:00.000Z","obsTimeLocal":"2026-10-03T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030552Z 04005KT 10SM BKN036 BKN075 OVC095 20/17 A3010 RMK AO2 RAE04 SLP191 P0000 60006 T02000172 10239 20194 51011 $","temp":20,"dewpoint":17.2,"humidity":84,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T06:52:00.000Z","obsTimeLocal":"2026-10-03T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030652Z 34008KT 10SM FEW029 OVC036 20/16 A3011 RMK AO2 RAB14E26 SLP194 P0000 T02000161 $","temp":20,"dewpoint":16.1,"humidity":78,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T07:52:00.000Z","obsTimeLocal":"2026-10-03T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030752Z 02013G24KT 9SM -RA FEW023 BKN031 OVC060 17/11 A3013 RMK AO2 RAB06 SLP199 P0005 T01670111 $","temp":16.7,"dewpoint":11.1,"humidity":70,"wind":6.7,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T08:52:00.000Z","obsTimeLocal":"2026-10-03T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030852Z 01010KT 10SM FEW022 BKN035 OVC110 16/10 A3016 RMK AO2 RAE52 SLP209 P0000 60005 T01610100 53018 $","temp":16.1,"dewpoint":10,"humidity":67,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T09:52:00.000Z","obsTimeLocal":"2026-10-03T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 030952Z 03008KT 10SM -RA OVC100 15/10 A3017 RMK AO2 RAB04 SLP214 P0000 T01500100 $","temp":15,"dewpoint":10,"humidity":72,"wind":4.1,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T10:52:00.000Z","obsTimeLocal":"2026-10-03T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031052Z 02006KT 10SM -RA BKN095 OVC140 15/11 A3019 RMK AO2 RAE21B50 SLP223 P0000 T01500106 $","temp":15,"dewpoint":10.6,"humidity":75,"wind":3.1,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T11:52:00.000Z","obsTimeLocal":"2026-10-03T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031152Z 35006KT 10SM SCT070 OVC100 16/11 A3022 RMK AO2 RAE45 SLP232 P0000 60005 70029 T01560106 10200 20150 53021 $","temp":15.6,"dewpoint":10.6,"humidity":72,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T12:52:00.000Z","obsTimeLocal":"2026-10-03T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031252Z 36010KT 10SM -RA FEW040 SCT095 BKN120 OVC150 15/10 A3024 RMK AO2 RAB1153 SLP238 P0000 T01500100 $","temp":15,"dewpoint":10,"humidity":72,"wind":5.1,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T13:52:00.000Z","obsTimeLocal":"2026-10-03T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031352Z 36007KT 10SM -RA FEW040 SCT070 BKN110 OVC140 14/11 A3025 RMK AO2 SLP241 P0002 T01440106 $","temp":14.4,"dewpoint":10.6,"humidity":78,"wind":3.6,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T14:52:00.000Z","obsTimeLocal":"2026-10-03T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031452Z 02006KT 10SM FEW040 SCT090 SCT120 BKN180 14/11 A3027 RMK AO2 RAE28 SLP249 P0002 60004 T01440106 53017 $","temp":14.4,"dewpoint":10.6,"humidity":78,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T15:52:00.000Z","obsTimeLocal":"2026-10-03T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031552Z 04007KT 10SM FEW025 BKN065 OVC110 16/11 A3026 RMK AO2 SLP246 T01560106 $","temp":15.6,"dewpoint":10.6,"humidity":72,"wind":3.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T16:52:00.000Z","obsTimeLocal":"2026-10-03T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031652Z 06003KT 10SM FEW025 BKN055 BKN070 OVC140 16/11 A3026 RMK AO2 SLP245 T01610106 $","temp":16.1,"dewpoint":10.6,"humidity":70,"wind":1.5,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T17:52:00.000Z","obsTimeLocal":"2026-10-03T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031752Z VRB05KT 10SM -RA FEW025 SCT050 BKN080 BKN140 17/10 A3026 RMK AO2 RAB51 SLP245 P0000 60004 T01670100 10167 20139 56004 $","temp":16.7,"dewpoint":10,"humidity":65,"wind":2.6,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T18:52:00.000Z","obsTimeLocal":"2026-10-03T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031852Z 00000KT 10SM FEW025 SCT060 BKN080 BKN130 17/09 A3025 RMK AO2 RAE00 SLP240 P0000 T01720094 $","temp":17.2,"dewpoint":9.4,"humidity":60,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T19:52:00.000Z","obsTimeLocal":"2026-10-03T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 031952Z 05004KT 10SM FEW030 BKN070 BKN100 BKN150 17/11 A3023 RMK AO2 SLP234 T01720111 $","temp":17.2,"dewpoint":11.1,"humidity":67,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T20:52:00.000Z","obsTimeLocal":"2026-10-03T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 032052Z 00000KT 10SM BKN055 BKN100 BKN150 17/11 A3023 RMK AO2 SLP237 60000 T01720111 55008 $","temp":17.2,"dewpoint":11.1,"humidity":67,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T21:52:00.000Z","obsTimeLocal":"2026-10-03T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 032152Z 08004KT 10SM BKN055 BKN100 17/12 A3023 RMK AO2 SLP237 T01720122 $","temp":17.2,"dewpoint":12.2,"humidity":72,"wind":2.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T22:52:00.000Z","obsTimeLocal":"2026-10-03T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 032252Z 00000KT 10SM SCT055 BKN095 17/12 A3024 RMK AO2 RAB42E52 SLP238 P0000 T01720122 $","temp":17.2,"dewpoint":12.2,"humidity":72,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-03T23:52:00.000Z","obsTimeLocal":"2026-10-03T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 032352Z 00000KT 10SM BKN050 BKN100 16/14 A3025 RMK AO2 SLP241 60000 T01610139 10178 20161 53004 $","temp":16.1,"dewpoint":13.9,"humidity":87,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-04T00:52:00.000Z","obsTimeLocal":"2026-10-03T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 040052Z 00000KT 10SM -RA BKN048 BKN085 16/14 A3025 RMK AO2 RAB46 SLP244 P0000 T01610139 $","temp":16.1,"dewpoint":13.9,"humidity":87,"wind":0,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-04T01:52:00.000Z","obsTimeLocal":"2026-10-03T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 040152Z 00000KT 10SM SCT028 BKN046 BKN085 16/14 A3026 RMK AO2 RAE0056 SLP245 P0000 T01610139 $","temp":16.1,"dewpoint":13.9,"humidity":87,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-04T02:52:00.000Z","obsTimeLocal":"2026-10-03T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 040252Z 00000KT 10SM BKN024 OVC045 16/14 A3026 RMK AO2 SLP245 60000 T01610139 51004 $","temp":16.1,"dewpoint":13.9,"humidity":87,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-04T03:40:00.000Z","obsTimeLocal":"2026-10-03T23:40:00-04:00","metarType":"SPECI","raw":"SPECI KIAD 040340Z 00000KT 10SM SCT023 SCT028 OVC041 16/14 A3025 RMK AO2 T01610139 $","temp":16.1,"dewpoint":13.9,"humidity":87,"wind":0,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-04T03:52:00.000Z","obsTimeLocal":"2026-10-03T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 040352Z 00000KT 10SM BKN023 OVC039 16/14 A3025 RMK AO2 SLP243 T01610144 $","temp":16.1,"dewpoint":14.4,"humidity":90,"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/2026-10-03","json":"https://weathermarket.io/api/station/KIAD/2026-10-03","record":"https://weathermarket.io/api/station/KIAD/2026-10-03?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-02","next":"https://weathermarket.io/station/KIAD/2026-10-04","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=3&year2=2026&month2=10&day2=5&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=3&hora=4&anof=2026&mesf=10&dayf=4&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}