{"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":"2026-10-17","window":{"date":"2026-10-17","timezone":"America/New_York","dayStartUtc":"2026-10-17T04:00:00.000Z","dayEndUtc":"2026-10-18T04:00:00.000Z","utcOffsetStart":"-04:00","utcOffsetEnd":"-04:00","hours":24},"complete":true,"values":{"tmax":16.7,"tmaxAt":"2026-10-17T04:52:00.000Z","tmin":7.8,"tminAt":"2026-10-18T03:52:00.000Z","tavg":12.7,"humidityMean":56.9,"windMean":5.5,"windMax":9.3,"windMaxAt":"2026-10-17T18:52:00.000Z","precipObservedCount":3,"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":"2026-10-17T04:52:00.000Z","obsTimeLocal":"2026-10-17T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170452Z 31005KT 10SM -RA OVC090 17/11 A2993 RMK AO2 RAB43 SLP134 P0000 T01670111 402780156","temp":16.7,"dewpoint":11.1,"humidity":70,"wind":2.6,"precipObserved":true,"correctedAt":null,"originalRaw":null},"tmin":{"obsTimeUtc":"2026-10-18T03:52:00.000Z","obsTimeLocal":"2026-10-17T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 180352Z 33006KT 10SM CLR 08/00 A3045 RMK AO2 SLP312 T00780000 $","temp":7.8,"dewpoint":0,"humidity":58,"wind":3.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},"windMax":{"obsTimeUtc":"2026-10-17T18:52:00.000Z","obsTimeLocal":"2026-10-17T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171852Z 35018G26KT 10SM FEW060 SCT150 15/00 A3025 RMK AO2 PK WND 35026/1851 SLP243 T01500000 $","temp":15,"dewpoint":0,"humidity":36,"wind":9.3,"precipObserved":false,"correctedAt":null,"originalRaw":null}},"finality":{"status":"final","finalAt":"2026-10-18T07:00:00.000Z","settleable":true,"coverage":{"ok":true,"maxGapMinutes":60,"normalIntervalMin":60,"thresholdMinutes":90},"reasons":[],"holdHours":3},"revision":"fae87f75c747f829","lastChangedAt":"2026-10-18T03:54:38.459Z","corrections":[],"anchor":{"contract":"0x2B59812947B48B5988FaA805a9514a5162415091","chainId":14,"record":"https://weathermarket.io/api/station/KIAD/2026-10-17?format=record","status":"anchored","sha256":"4b1c09e3db8a22b03d692a3fc8c59eda1367c111674aade0928f13cddf97b2dc","revision":"fae87f75c747f829","flareTxHash":"0x4994c9bddc45bb7d4d460bff066bca5077a5fc31a8585d2dca6b572c8eb6ddbd","flareBlock":72385642,"anchoredAt":"2026-10-18T07:01:54.780Z","explorer":"https://flare-explorer.flare.network/tx/0x4994c9bddc45bb7d4d460bff066bca5077a5fc31a8585d2dca6b572c8eb6ddbd","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":"2026-10-17T04:52:00.000Z","flag":"good","reasons":[]},"tmin":{"obsTimeUtc":"2026-10-18T03:52:00.000Z","flag":"good","reasons":[]},"anyFlagged":false},"excludingBad":{"tmax":16.7,"tmin":7.8,"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":16.11,"tmin":6.67,"precip":0.76,"corrected":false,"issuedAt":"2026-10-18T06:24:00.000Z","html":"https://weathermarket.io/nws-cli/KIAD/2026-10-17","json":"https://weathermarket.io/api/nws-cli/KIAD/2026-10-17"},"observations":[{"obsTimeUtc":"2026-10-17T04:52:00.000Z","obsTimeLocal":"2026-10-17T00:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170452Z 31005KT 10SM -RA OVC090 17/11 A2993 RMK AO2 RAB43 SLP134 P0000 T01670111 402780156","temp":16.7,"dewpoint":11.1,"humidity":70,"wind":2.6,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T05:52:00.000Z","obsTimeLocal":"2026-10-17T01:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170552Z 32008KT 10SM FEW070 OVC095 16/11 A2993 RMK AO2 RAE50 SLP133 P0000 60000 T01610106 10189 20161 50013","temp":16.1,"dewpoint":10.6,"humidity":70,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T06:52:00.000Z","obsTimeLocal":"2026-10-17T02:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170652Z 32005KT 10SM SCT045 BKN055 OVC095 16/10 A2995 RMK AO2 RAB17E27 SLP138 P0000 T01560100","temp":15.6,"dewpoint":10,"humidity":69,"wind":2.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T07:52:00.000Z","obsTimeLocal":"2026-10-17T03:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170752Z 34011G17KT 10SM -RA BKN041 OVC055 14/11 A2997 RMK AO2 RAB0659 SLP145 P0001 T01440111","temp":14.4,"dewpoint":11.1,"humidity":81,"wind":5.7,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T08:52:00.000Z","obsTimeLocal":"2026-10-17T04:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170852Z 34010G17KT 10SM FEW020 OVC060 13/10 A2998 RMK AO2 RAE38 SLP151 P0000 60001 T01330100 51018","temp":13.3,"dewpoint":10,"humidity":80,"wind":5.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T09:52:00.000Z","obsTimeLocal":"2026-10-17T05:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 170952Z 33011G18KT 10SM -RA FEW015 BKN035 OVC060 13/10 A3003 RMK AO2 RAB04 SLP166 P0002 T01280100","temp":12.8,"dewpoint":10,"humidity":83,"wind":5.7,"precipObserved":true,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T10:52:00.000Z","obsTimeLocal":"2026-10-17T06:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171052Z 33009KT 10SM FEW015 SCT049 BKN060 BKN150 BKN200 12/09 A3006 RMK AO2 RAE40 SLP178 P0000 T01220089 $","temp":12.2,"dewpoint":8.9,"humidity":80,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T11:52:00.000Z","obsTimeLocal":"2026-10-17T07:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171152Z 33008KT 10SM FEW015 BKN039 BKN060 OVC150 12/08 A3008 RMK AO2 SLP186 60003 70020 T01220083 10161 20122 51033 $","temp":12.2,"dewpoint":8.3,"humidity":77,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T12:52:00.000Z","obsTimeLocal":"2026-10-17T08:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171252Z 34013G21KT 10SM FEW015 OVC035 12/07 A3013 RMK AO2 PRESRR SLP202 T01220067 $","temp":12.2,"dewpoint":6.7,"humidity":69,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T13:52:00.000Z","obsTimeLocal":"2026-10-17T09:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171352Z 35017G24KT 10SM FEW015 BKN037 12/06 A3018 RMK AO2 PK WND 02029/1316 RAB05E15 SLP219 P0000 T01170056 $","temp":11.7,"dewpoint":5.6,"humidity":66,"wind":8.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T14:52:00.000Z","obsTimeLocal":"2026-10-17T10:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171452Z 01009G18KT 10SM FEW015 SCT035 BKN048 BKN130 12/05 A3021 RMK AO2 PK WND 02026/1358 SLP229 60000 T01220050 51043 $","temp":12.2,"dewpoint":5,"humidity":61,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T15:52:00.000Z","obsTimeLocal":"2026-10-17T11:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171552Z 35016G22KT 10SM BKN044 BKN130 12/03 A3025 RMK AO2 PK WND 35026/1535 SLP241 T01170028 $","temp":11.7,"dewpoint":2.8,"humidity":54,"wind":8.2,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T16:52:00.000Z","obsTimeLocal":"2026-10-17T12:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171652Z 35015G23KT 10SM BKN046 BKN120 BKN250 12/01 A3025 RMK AO2 PK WND 35029/1636 SLP242 T01220011 $","temp":12.2,"dewpoint":1.1,"humidity":47,"wind":7.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T17:52:00.000Z","obsTimeLocal":"2026-10-17T13:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171752Z 36009G20KT 10SM SCT050 BKN140 BKN180 14/01 A3025 RMK AO2 SLP244 60000 T01390006 10139 20111 51015 $","temp":13.9,"dewpoint":0.6,"humidity":40,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T18:52:00.000Z","obsTimeLocal":"2026-10-17T14:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171852Z 35018G26KT 10SM FEW060 SCT150 15/00 A3025 RMK AO2 PK WND 35026/1851 SLP243 T01500000 $","temp":15,"dewpoint":0,"humidity":36,"wind":9.3,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T19:52:00.000Z","obsTimeLocal":"2026-10-17T15:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 171952Z 33017G33KT 10SM FEW060 FEW150 14/00 A3025 RMK AO2 PK WND 35033/1943 SLP243 T01440000 $","temp":14.4,"dewpoint":0,"humidity":37,"wind":8.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T20:52:00.000Z","obsTimeLocal":"2026-10-17T16:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 172052Z 34011G24KT 10SM FEW060 FEW150 14/M01 A3027 RMK AO2 PK WND 34027/2009 SLP249 T01391006 53004 $","temp":13.9,"dewpoint":-0.6,"humidity":37,"wind":5.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T21:52:00.000Z","obsTimeLocal":"2026-10-17T17:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 172152Z 33013G21KT 10SM FEW060 FEW150 13/M01 A3029 RMK AO2 PK WND 33026/2109 SLP257 T01331011 $","temp":13.3,"dewpoint":-1.1,"humidity":37,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T22:52:00.000Z","obsTimeLocal":"2026-10-17T18:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 172252Z 34009KT 10SM FEW150 12/M01 A3033 RMK AO2 SLP271 T01171011 $","temp":11.7,"dewpoint":-1.1,"humidity":41,"wind":4.6,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-17T23:52:00.000Z","obsTimeLocal":"2026-10-17T19:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 172352Z 35013G21KT 10SM CLR 11/M02 A3036 RMK AO2 SLP282 T01111017 10150 20111 53033 $","temp":11.1,"dewpoint":-1.7,"humidity":41,"wind":6.7,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T00:52:00.000Z","obsTimeLocal":"2026-10-17T20:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 180052Z 34008KT 10SM CLR 11/M02 A3039 RMK AO2 SLP293 T01061017 $","temp":10.6,"dewpoint":-1.7,"humidity":42,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T01:52:00.000Z","obsTimeLocal":"2026-10-17T21:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 180152Z 36008KT 10SM CLR 10/M02 A3042 RMK AO2 SLP302 T01001017 $","temp":10,"dewpoint":-1.7,"humidity":44,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T02:52:00.000Z","obsTimeLocal":"2026-10-17T22:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 180252Z 36008KT 10SM CLR 09/M02 A3044 RMK AO2 SLP309 T00941017 51027 $","temp":9.4,"dewpoint":-1.7,"humidity":46,"wind":4.1,"precipObserved":false,"correctedAt":null,"originalRaw":null},{"obsTimeUtc":"2026-10-18T03:52:00.000Z","obsTimeLocal":"2026-10-17T23:52:00-04:00","metarType":"METAR","raw":"METAR KIAD 180352Z 33006KT 10SM CLR 08/00 A3045 RMK AO2 SLP312 T00780000 $","temp":7.8,"dewpoint":0,"humidity":58,"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/2026-10-17","json":"https://weathermarket.io/api/station/KIAD/2026-10-17","record":"https://weathermarket.io/api/station/KIAD/2026-10-17?format=record","prev":"https://weathermarket.io/station/KIAD/2026-10-16","next":"https://weathermarket.io/station/KIAD/2026-10-18","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=17&year2=2026&month2=10&day2=19&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=17&hora=4&anof=2026&mesf=10&dayf=18&horaf=3&minf=59&send=send","awcLive":"https://aviationweather.gov/data/metar/?ids=KIAD"}}}