Highest temperature in Tokyo on May 22?

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Market context

Tokyo’s temperature on 22 May is usually set by late-spring conditions rather than any single dramatic weather system. For Haneda Airport, May is generally mild to warm, with daytime highs commonly in the low-to-mid 20s Celsius and only a modest chance of the sort of heat that would push the day’s maximum into an unusually high band. That makes the upper ranges far more dependent on a brief warm spell, strong sunshine and light winds than on the monthly average alone.

Comparable May readings in Tokyo suggest the most likely outcome sits in a middle range, with temperatures often topping out near 20-25°C and only occasionally edging higher. Source material on Tokyo’s May climate points to average highs around 22-23°C, with some forecasts allowing spikes into the upper 20s or low 30s, but those are not the norm. In market terms, the implied 0% YES price fits a view that a very hot outlier is unlikely unless there is an unusually strong southerly flow or a clear, dry spell over the city.

The main catalyst is the day’s weather evolution itself, not politics-style events. Traders should watch the late-morning and early-afternoon forecast updates for Tokyo Haneda, especially any revision on cloud cover, wind direction and humidity, because those can materially alter the high temperature by midday. Wunderground’s hourly history for RJTT is the settlement source, so the key dependency is whether conditions turn sunny enough before noon UTC to lift the day’s peak. Small changes in forecast timing matter here more than in most spring markets.

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Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Tokyo on May 22? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

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How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.