Settlement stations / RJTT

JP · Asia/Tokyo

Polymarket and IBKR settle Tokyo temperature on RJTT

RJTT is Haneda, Tokyo. Polymarket and IBKR ForecastEx settle temperature contracts here. Below: the resolution source each venue names, when the station reports, and how long a reading takes to reach the public feed.

How it settles

VenueResolution sourceUnitBucketContracts
PolymarketRoutine METAR reports published by aviationweather.gov
Source code RJTT. Every report not marked SPECI counts, off-hour ones included, read from the T group in tenths of a degree Celsius and rounded half up to a whole degree of the contract. It is the same report stream shown here, so the running high tracks it directly.		Celsius1°C
Range contract		high · low
highest-temperature-in-tokyo, lowest-temperature-in-tokyo
IBKR ForecastExWeather Underground daily history table for this station
Source code RJTT. That table carries hourly METARs and SPECIs only, over the local clock day, and prints whole degrees rounded.		Celsius1°C ladder
Exceeds X, one rung per degree		high
SHJTT

Reporting and delay

Regular reports:00 :30:00 and :30 past each hour, UTC — 2 regular reports per hour.
Median delay7 min 54 sFrom the observation time in the report to the public NOAA feed. 52 reports, measured 2026-09-17.
90th percentile10 min 13 sOne report in ten is at least this late. Worth knowing before you trust a quiet hour.
Coordinates35.553, 139.781Local civil time: Asia/Tokyo

Questions

Which weather station settles Tokyo temperature contracts?

Polymarket and IBKR ForecastEx settle Tokyo on RJTT, Haneda.

What is the resolution source for Polymarket Tokyo temperature?

Polymarket names Routine METAR reports published by aviationweather.gov. Contracts settle in Celsius, on 1-degree buckets. Every report not marked SPECI counts, off-hour ones included, read from the T group in tenths of a degree Celsius and rounded half up to a whole degree of the contract. It is the same report stream shown here, so the running high tracks it directly.

What is the resolution source for IBKR ForecastEx Tokyo temperature?

IBKR ForecastEx names Weather Underground daily history table for this station. Contracts settle in Celsius, as a ladder of contracts one degree apart that pay when the day's reading passes the strike. That table carries hourly METARs and SPECIs only, over the local clock day, and prints whole degrees rounded.

When does RJTT report?

:00 and :30 past each hour, UTC — 2 regular reports per hour.

How long does a RJTT observation take to become public?

Measured over 26 hours on 2026-09-17, the median delay from the observation time in the report to its arrival on the public NOAA feed was 7 min 54 s, with a 90th percentile of 10 min 13 s across 52 reports. This moves with upstream conditions and is not a service level.

RJTT is live on every paid plan. See the plans — from $9.90 a month, cancel from the account portal.

WeatherTick tracks 76 settlement stations and publishes each day's running high and low already converted into the unit and bucket the contract settles in. Open Tokyo on the board, or see every settlement station. Settlement always follows the resolution source named by the venue; the figures here are computed from the public feed and are not a settlement source.