Paris Low Temp May 27: Will It Hit 16°C?

Paris weather markets are rarely settled science, and this one is no exception. Traders have placed a 34% probability on the overnight low hitting exactly 16°C on May 27. That’s a one-in-three shot on a single degree band in a city where late-May temperatures can swing several degrees overnight depending on cloud cover and wind direction from the Atlantic.

The market question asks: what is the lowest temperature recorded in Paris on May 27? The 16°C outcome carries a YES price of $0.34 against a NO price of $0.66, with resolution set for 2026-05-27 at 12:00 UTC. Total volume stands at $3,236, with $2,579 trading in the last 24 hours.

How the 16°C Contract Works

This contract resolves YES if the official lowest temperature recorded in Paris on May 27, 2026 falls at exactly 16°C. Any other reading, whether 15°C, 17°C, or any other value listed among the alternatives, resolves this contract NO. The measurement body and data source are defined by the market’s resolution terms.

• YES ($0.34): The Paris overnight low registers exactly 16°C on May 27.
• NO ($0.66): The Paris overnight low registers any temperature other than 16°C, including 15°C, 17°C, 18°C, or any other listed outcome.

A NO resolution here doesn’t require extreme weather. Late-May Paris lows cluster between 12°C and 20°C historically, so the probability mass is spread across roughly nine distinct outcomes. The market resolving NO simply means one of the other eight or more temperature bands captured the actual overnight minimum. That’s why the NO side carries 66% probability: it represents all outcomes except one specific degree reading.

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Momentum and Market Signals

The momentum signal on this contract is essentially flat. The 1-hour price change sits at 0.0%, there is no meaningful 24-hour comparison available, and the trend score of 27.46 reflects a low-conviction, range-bound market with no strong directional push. The price has held at $0.34 since opening, suggesting traders have not received any new forecast data that would shift confidence toward or away from the 16°C outcome.

Total volume of $3,236 is thin. The 24-hour volume of $2,579 actually represents most of the contract’s total activity, meaning participation is recent but still minimal in absolute terms. Liquidity stands at $13,460, which is healthy relative to volume, but thin markets like this one can reprice sharply if a high-confidence weather forecast lands in the next few hours. A single updated model run from Météo-France or the European Centre for Medium-Range Weather Forecasts could move this price meaningfully before resolution.

Key Factors

• The YES price has held at $0.34 with zero movement in the last hour, reflecting no new forecast catalyst as of 2026-05-26 at 23:14 UTC.
• The 24-hour volume of $2,579 is unusually high relative to total contract volume, indicating most activity is very recent and the market is still forming.
• Liquidity of $13,460 exceeds total volume by a factor of four, suggesting market makers are present but directional conviction from traders remains low.
• The spread of eleven discrete outcome options means no single temperature band commands a majority; 16°C at 34% is the current leader but far from dominant.
• Resolution occurs at 12:00 UTC on May 27, leaving less than 13 hours from the timestamp of this analysis for forecast conditions to crystallize.

Lines Analysis: Paris Overnight Low on May 27

The 16°C outcome holds the highest individual probability among all listed options, which makes it the market’s best single guess. Late May in Paris typically sees overnight lows in the mid-to-upper teens, and 16°C sits squarely in the historically common range for this time of year. If European weather models are converging on a mild, partly cloudy night with light southwesterly flow, 16°C is a reasonable modal expectation. That’s what 34% reflects: the mode of a distribution, not a confident forecast.

What makes the NO side compelling is pure arithmetic. Even if forecasters are confident the low will fall somewhere between 15°C and 17°C, splitting that probability across three separate outcomes means no single band clears 50%. A slightly cooler night with clear skies could pull the low to 15°C or even 14°C. A warmer, overcast night with humidity off the Seine could push it to 17°C or 18°C. The meteorological variance on a single overnight low in Paris is real, and the market structure amplifies that variance by carving temperature into one-degree resolution intervals.

Signals to Monitor

• Météo-France’s next forecast update for Paris overnight temperatures on May 26 to 27 will be the single most important input before resolution.
• The European Centre for Medium-Range Weather Forecasts ensemble model consensus for Paris, especially the spread on the overnight minimum, will indicate how confident professional forecasters are about the temperature band.
• Observed evening temperatures in Paris on May 26 provide a baseline: if the city is still at 20°C at 21:00 local time, a 16°C low becomes less likely.
• Cloud cover and wind direction forecasts matter directly: clear skies accelerate radiative cooling toward the lower end of the range, while overcast conditions hold temperatures higher overnight.
• Any significant movement in the 15°C or 17°C outcome prices on Polymarket would signal traders are shifting probability mass to adjacent bands, which would reprice the 16°C contract.

The data doesn’t care about the politics, and in this case, it barely cares about the market either. With $3,236 in total volume, this contract is a niche weather bet resolving in hours. The 34% probability on 16°C reflects reasonable meteorological logic, but the compressed timeline and high outcome variance mean the market is pricing uncertainty, not science. Whichever temperature band ultimately captures the Paris overnight low will be driven by atmospheric conditions, not trader conviction.

LINES VERDICT

Highest Probability, Still a Long Shot

The 16°C outcome is the market’s modal pick, but modal doesn’t mean likely when probability is fragmented across eleven outcomes. The meteorological range for a late-May Paris overnight low is wide enough that 66% NO is well-supported.

What the market says: 34% implied probability means traders give this outcome roughly one-in-three odds, reflecting 16°C as the single most likely individual outcome while acknowledging that any of ten other temperature readings is collectively more probable. With resolution in less than 13 hours, this price will be sensitive to any updated forecast model output or observed evening temperatures in Paris.

Key unknown: The Météo-France or ECMWF ensemble forecast for Paris on the night of May 26 to 27 is the one data point that could sharply reprice this contract. A tight model consensus on a specific degree band would push that band’s probability up and pull all others, including 16°C, down or sideways.