Highest temperature in Paris on May 31?

On Polymarket, the highest temperature in Paris on May 31 is priced as a set of binary or range-based outcome contracts. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Each contract represents a specific temperature threshold or band, and traders buy or sell shares reflecting their belief in that outcome. The price of each share (typically 0 to 1 USD) represents the market's implied probability. Liquidity, order flow, and recent weather developments drive price discovery. Traders can enter or exit positions at any time before the market resolves on May 31, 2026.

The market resolves on May 31, 2026, after the highest temperature in Paris on May 31 has been recorded. Resolution is determined by the official temperature reading from a designated meteorological source for Paris on that date. The outcome is binary or categorical depending on the contract structure—for example, whether the high exceeds a specific threshold or falls within a defined range. Once the actual temperature is confirmed and published, the winning outcome is settled and traders receive payouts accordingly.

Major weather pattern shifts, seasonal forecasts, and atmospheric indices like the North Atlantic Oscillation or jet-stream positioning can move odds significantly. Heat waves, cold fronts, or unusual pressure systems developing weeks before May 31 will trigger trader repricing. Real-time weather model updates and ensemble forecast consensus changes are key catalysts. Broader climate anomalies, ocean temperatures, and solar activity may also influence long-range expectations. As May approaches, daily weather updates and short-range model refinements will drive increasingly volatile trading near resolution.