This prediction market asks traders to assess the probability that Paris's highest temperature on May 18, 2026, will be exactly 11°C—a highly specific meteorological outcome. The market resolves based on official temperature records from Météo-France, France's national weather service, which monitors and records daily maximum temperatures in the Paris region with precision. At 0% current odds, the market reflects strong trader consensus that this exact temperature is extremely unlikely, a view grounded in the statistical reality that pinpointing a single precise value on a continuous distribution is inherently challenging. May temperatures in Paris typically span 12–20°C depending on atmospheric conditions, making 11°C a cool but historically plausible value, yet hitting that specific number as the daily high remains a statistically low-probability event. The extreme pricing suggests near-universal agreement that May 18 will deliver conditions either notably warmer or notably cooler than this threshold. Weather-focused traders monitor atmospheric pressure patterns, seasonal shifts, and regional climate data to form views on such granular meteorological outcomes, making this market a useful barometer for precision temperature forecasting accuracy.
Deep dive — what moves this market
May in the Paris region sits at the cusp of European spring-to-summer transition, where atmospheric circulation patterns can deliver surprising thermal swings. Climatologically, Paris sees average high temperatures in May ranging from 14–18°C, with cooler days influenced by Atlantic low-pressure systems and warmer days driven by Mediterranean influences or continental air masses. An 11°C high would represent a notably cool day even for May, falling approximately 3–6°C below seasonal normal, yet such conditions do occur when polar fronts extend southward or persistent cloud cover limits solar heating. For this market to resolve YES, traders must anticipate a specific confluence: a cool airmass positioned over northern France with sufficient cloud coverage to suppress daytime warming, while the high temperature stabilizes exactly at 11°C—not 10°C, not 12°C, but precisely 11°C as recorded by Météo-France's official stations. The challenge here is inherent to all precision-weather markets: even if atmospheric models successfully predict a cool day with a high around 10–12°C, achieving the exact value is akin to archery at extreme distance. Factors supporting cooler temperatures on May 18 would include an active jet stream steering cooler air southward, persistent cloud cover throughout the day, and perhaps rain-bearing systems suppressing surface heating. Factors supporting warmer temperatures would be high-pressure systems building across western Europe, clear skies enhancing daytime warming, or advection of warmer air from the south. Recent May weather in Paris has shown increasing volatility tied to North Atlantic Oscillation shifts; anomalously cool days (8–10°C highs) and warm days (22–24°C highs) both occur, though within narrower bands than extreme outliers. The 0% pricing suggests traders view 11°C as an unlikely sweet spot—most are hedging that May 18 will either see spring-like warmth (16+°C) or cool weather dipping to 8–9°C, but not cluster around this middle-cool value. This reflects broader market dynamics where traders gravitate toward outcomes perceived as more probable given atmospheric baseline trends. The extremely short resolution window—less than 24 hours—means traders have limited ability to update on new meteorological data; most positions likely reflect longer-term European weather model guidance and seasonal climatology rather than real-time forecasts.
What traders watch for
May 18 midnight UTC: Météo-France official Paris weather station records daily maximum, determining final resolution.
Atlantic low-pressure systems and persistent cloud cover could suppress May 18 temperatures toward 11°C threshold.
Spring warmth dominance: European high-pressure building would push Paris toward 16–20°C highs, decisively favoring NO.
Precision challenge: Even accurate 10–12°C forecast range makes hitting exactly 11°C a statistically low-probability outcome.
How does this market resolve?
Market resolves based on the official maximum temperature recorded by Météo-France for Paris on May 18, 2026, at midnight UTC. If the daily high temperature equals exactly 11°C, YES wins; otherwise, NO wins.
Prediction markets aggregate trader expectations into real-time probability estimates. On Polymarket Trade, every market question resolves YES or NO based on a specific event outcome; traders buy shares of the side they believe will resolve positively. Prices range 0¢ (certain no) to 100¢ (certain yes) and naturally reflect the crowd-implied probability of YES. This page summarizes the market state for readers arriving from search; for live trading (place orders, see order book depth, execute a trade) open the full interactive page linked above.
