May 17 in Paris typically sees spring temperatures in the mid-teens Celsius. This market focuses on whether the day's highest temperature will be exactly 11°C—a specific threshold reflecting cool spring weather. The 0% odds indicate traders view this outcome as nearly impossible, reflecting seasonal expectations: mid-May Paris historically averages highs around 18–20°C, making 11°C a notable departure. Current market liquidity of $6,213 suggests modest trader interest in precise weather outcomes. The pricing likely reflects recent warmer European patterns and the rarity of such cool days in late spring.
Deep dive — what moves this market
Paris in May represents a transition period in the Northern Hemisphere spring season, where average high temperatures have risen substantially from April's cooler days into the late spring range. The specific threshold of 11°C for a daily maximum reflects unusually cool conditions for mid-May in Paris. Historically, by May 17, the city's average high temperature hovers around 18–20°C, with typical daily ranges between 13–20°C. A day where the highest temperature reaches only 11°C would represent a significant departure from seasonal norms, ranking among the cooler outcomes for that date based on 30-year climate data.
Several factors could theoretically push the market toward a YES resolution. A vigorous cold front from the Atlantic or an unusually persistent high-pressure system anchored over Northern Europe could deliver cooler air masses to Paris. Spring Atlantic storms sometimes bring unseasonable cold snaps, and frontal boundaries occasionally stall over France, bringing extended cool periods. Historical analogs exist: late spring cold snaps have occurred in previous years, though they are statistical outliers rather than common occurrences.
However, multiple factors strongly favor the NO outcome, explaining the 0% odds. The calendrical proximity to summer (May 17 is just 35 days before the June solstice) means seasonal warming is substantially underway across continental Europe. High-pressure systems typical of May favor sunshine and warmth. Recent European climate data shows warming patterns, particularly in spring months. Additionally, the specificity of the threshold (exactly 11°C as the day's maximum, not a range like below 12°C) makes the outcome statistically less likely than more flexible criteria.
The market's extreme pricing—0% YES—reflects the compound effect of two elements: first, the low historical probability of such cool conditions in mid-May Paris; second, the market's focus on an exact single-degree threshold rather than a range. Even a day with a high of 12°C or 10°C would not resolve YES. Traders expressing 0% conviction are essentially stating that they expect May 17, 2026 to follow typical seasonal expectations with highs in the 16–22°C range, leaving the 11°C target far outside their forecast confidence intervals. The modest 24-hour volume of $671 alongside the zero odds suggests limited trader attention and low perceived probability, with whatever interest exists focused on the small possibility of an exceptional meteorological event.
