This market asks whether Wellington's maximum temperature will be precisely 9°C on May 17, 2026. The 0% odds suggest traders view this exact outcome as highly unlikely, reflecting the inherent difficulty in predicting any weather system to such specific precision. Wellington, New Zealand's capital, experiences temperate maritime climate with considerable daily variation. A 9°C high in mid-May aligns with late autumn in the Southern Hemisphere, within the plausible seasonal range. However, the exactness required—not 8.9°C or 9.1°C, but precisely 9°C—makes this a narrow target. The 0% odds reflect rational skepticism about predicting decimal-point accuracy in real-world weather measurement. Meteorological forecasts typically work in broader ranges, and actual temperature readings carry measurement uncertainty. The market resolves based on official Wellington MetService records. The low current odds imply traders believe the actual high will deviate from this precise point, either warmer or cooler. This is characteristic of weather precision markets where exact-value outcomes rarely attract bullish positioning.
Deep dive — what moves this market
Wellington's climate during mid-May represents the transition from autumn into early winter across the Southern Hemisphere. Typically, maximum temperatures in Wellington during this period range from 10 to 14°C, with occasional cooler days dropping to 8–9°C and warmer outliers reaching 15°C or higher. The 9°C threshold sits at the lower end of this seasonal range, making it plausible but not dominant for any given day. What complicates prediction is not just seasonal tendency but the specific meteorological systems active on May 17, 2026—frontal passages, high-pressure systems, and maritime air patterns will influence the actual maximum. For the YES outcome to occur, Wellington would need an overcast day with limited solar warming, likely a southerly or southeasterly airflow bringing cooler air masses, possible rain or cloud cover persisting through the afternoon, and no unexpected warm spell from a northerly wind shift. These conditions are certainly possible in Wellington's autumn weather. However, weather measurement introduces additional complexity. Official temperature readings from the New Zealand MetService station carry measurement protocols, rounding conventions, and inherent observational uncertainty. A true maximum of 8.97°C might round to 9°C under certain recording methodologies, but capturing that exact threshold requires both meteorological coincidence and measurement alignment. The NO case is statistically far more probable. Even if the high ranges from 8 to 10°C—a narrow band—the actual value will almost certainly fall at some decimal precision other than exactly 9.0°C. Historical Wellington temperature records show that precise whole-number highs occur far less frequently than values scattered across decimal ranges. A cooler day might produce 8.2°C or 8.8°C; a slightly warmer day might yield 9.3°C or 9.6°C. The 0% odds reflect this mathematical reality: when predicting any continuous variable to exact precision, the probability approaches zero unless the outcome is structurally forced. The market's structural design—asking for exact-value precision rather than ranges—creates a natural bearish bias. Traders rational about probability theory avoid long positions on such precise outcomes, driving YES odds toward zero.
What traders watch for
May 17 official MetService maximum temperature record for Wellington is the sole determinant for market resolution.
Southern Hemisphere autumn weather patterns and frontal systems active in the 72 hours before resolution.
Real-time forecast model outputs May 15–17 showing predicted daily highs for Wellington and confidence intervals.
Cloud cover, rainfall timing, and wind direction shifts that suppress or enhance solar warming on the day.
How does this market resolve?
Market resolves on May 17, 2026 (UTC) based on official New Zealand MetService record of Wellington's maximum temperature for that calendar day. YES wins only if the recorded high is exactly 9°C; any other value resolves NO.
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.
