Amsterdam's weather on April 28 will be evaluated against a high temperature threshold of 11°C. With current YES odds at 0%, the market shows near-unanimous trader conviction that temperatures will exceed this level on the date in question. In late April, Amsterdam typically experiences steady spring warming, with average daily highs ranging from 12°C to 14°C across the city. A maximum temperature of 11°C or below would represent a notably cool day even by early-spring standards in the Netherlands. The market's complete absence of YES volume suggests traders are confidently pricing in normal seasonal progression and the rapidly diminishing likelihood of significant cold snaps as the month approaches its final week. Recent weather patterns across northern Europe have trended warmer than long-term historical norms, further supporting expectations of above-threshold temperatures. The resolution will depend entirely on the official temperature recorded by the Royal Netherlands Meteorological Institute (KNMI), which operates Amsterdam's primary weather monitoring station.
Deep dive — what moves this market
Late April represents a transitional period in the Netherlands where spring's warming influence typically dominates over lingering winter air masses. Amsterdam's April climate reflects this pattern clearly—the month begins with average highs near 11-12°C and typically warms to 13-15°C by month's end. A recorded high of 11°C or below on April 28 would place the day in approximately the coldest 10-15% of all April days historically, suggesting both statistical improbability and the need for unusual atmospheric conditions. For temperatures to remain at or below 11°C on this late-April date, Amsterdam would need to experience either a strong Atlantic cold front with maritime polar air, sustained overcast and wet conditions limiting solar heating, or an intrusion of cool air from northern latitudes. While such systems occasionally occur in April, their frequency decreases sharply as the calendar moves toward May.
The broader European weather pattern typically shows what meteorologists call a positive North Atlantic Oscillation (NAO) phase in spring, favoring milder southwesterly winds and warmer continental influences. This pattern has been the dominant signal throughout April 2026 to date. Recent analogues—such as late April 2023 and 2024—saw Amsterdam experience highs of 14-16°C without major cold disruptions or unexpected reversions to cool conditions. The complete absence of YES odds at 0% reflects market confidence in continued normal seasonal warming rather than any specific forecast prediction for that single day.
What could push temperatures toward YES involves a sudden shift in the jet stream pattern or an unexpected Atlantic storm system with cold characteristics. Cold-core low pressure systems tracking across the North Sea can bring unseasonably cool and wet conditions, limiting daytime highs through cloud cover and precipitation. However, these systems must arrive with sufficient timing and depth to overcome the accumulated warmth and lengthening daylight effects of late April—a high meteorological bar.
Conversely, NO outcomes are strongly supported by persistent high pressure patterns, clear skies enhancing solar heating, and warm air advection from continental Europe or the Atlantic. Even moderate warming means temperatures easily exceed 12°C and resolve decisively against the 11°C threshold. The 0% YES odds imply traders view the risk of cold disruption as negligible and believe seasonal progression will deliver typical or above-typical late-April warmth patterns. This near-unanimous consensus pricing suggests very high conviction in warmer outcomes, leaving minimal uncertainty in the market's collective assessment of temperature probabilities.
What traders watch for
Market resolves April 28 at midnight UTC using official Amsterdam temperature data from the Royal Netherlands Meteorological Institute (KNMI).
Strong Atlantic cold fronts and wet weather systems from the north could depress temperatures, though increasingly rare in late April.
Average April 28 highs in Amsterdam range 13-14°C; historical records show 11°C or below occurs on roughly 10% of April days.
Spring warming acceleration in late April and positive NAO patterns typically favor warmer-than-threshold outcomes across northern Europe.
How does this market resolve?
Market resolves YES if the official highest temperature recorded in Amsterdam on April 28, 2026 is 11°C or below according to KNMI data. Market resolves NO if the recorded high temperature exceeds 11°C.
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.
