Highest temperature in Tokyo on May 31?

Highest temperature in Tokyo on May 31? is a weather prediction market forecasting the hottest temperature recorded at Tokyo Haneda Airport Station on 31 May 2026. The market resolves to the Celsius temperature range that contains the day’s highest observed reading, using Wunderground’s daily history for Tokyo Haneda Airport as the source. Because the source measures temperatures in whole degrees Celsius, resolution will be based on that level of precision, and final data may be revised until the first datapoint for 1 June is published. Trading opens before the end of May 2026 and the event closes on 31 May 2026 at 12:00 UTC. Current market probability is about 5%, suggesting traders see a low chance of an unusually high-temperature outcome. As a recurring Tokyo weather forecast, the event reflects market sentiment around local daily temperature conditions rather than broader climate trends. For prediction market participants, the key question is simply what the expected outcome will be for the day’s peak temperature range in Tokyo.