Seattle's daily high temperature on May 17 is the subject of this recurring weather prediction market. The 52-53°F range represents a cool but plausible outcome for the Pacific Northwest in mid-May. Currently trading at 0% YES odds, the market reflects strong trader consensus that the high temperature will fall outside this specific band—either significantly warmer (the more probable outcome given typical May weather in Seattle) or notably cooler (less likely but possible). The resolution mechanism is straightforward: the National Weather Service's official high temperature reading for Seattle-Tacoma International Airport on May 17 will settle the market. With settlement arriving at midnight, the 0% odds capture the market's final assessment just hours before the actual temperature is locked in. The liquidity of $9,149 and recent 24-hour volume of $1,092 indicate steady participation in this recurring daily weather event.
Deep dive — what moves this market
Seattle's Pacific Northwest location presents complex weather dynamics for prediction markets. May 17 falls in spring's heart, when the region typically transitions from cool maritime conditions toward warmer early-summer temperatures. A 52-53°F high would represent a notably cool day even for this season, suggesting invading low-pressure systems, persistent marine layer influence, or an arctic airmass surge from the north. Several factors could theoretically support YES resolution. A deep trough of low pressure moving onshore or cool maritime air from the Pacific could suppress temperatures into the upper 50s or low 50s. Late-season cold snaps occasionally affect the Pacific Northwest well into May; reversions to winter-like conditions remain meteorologically plausible. Additionally, ocean temperatures influence coastal Seattle significantly; cool water can suppress heat during onshore flow patterns. Conversely, multiple factors point toward NO. Mid-May climatology shows pronounced warming trends as solar forcing increases and the jet stream migrates poleward. Seattle's typical high temperatures in mid-May range from 63-67°F. An established surface high-pressure system or warm-air advection from the Pacific would easily push temperatures well above the 52-53°F threshold. Any weak low-pressure system clearing the region or ridging aloft shifting northward would yield considerably warmer conditions. Historical analogs demonstrate that while May cool spells do occur, they remain statistical outliers rather than dominant outcomes. The current market price at 0% YES reflects trader confidence in above-average conditions. Experienced weather market participants have clearly positioned for warmth, with 52-53°F representing roughly the 20th percentile of May highs in Seattle—making it a distinctly cool scenario. The market's extreme tilt at zero odds suggests traders see model guidance and long-range climate patterns pointing decisively away from such a cool outcome.
What traders watch for
National Weather Service official high temperature report for Seattle-Tacoma International Airport on May 17 at midnight UTC settlement.
Marine layer strength and ocean surface temperatures: weak marine layer favors warmth; strong layer with cool water suppresses highs.
Late-developing weather systems: clearing high pressure brings warmth; low-pressure intrusion cools region significantly.
How does this market resolve?
The market resolves on May 17, 2026 at 00:00:00 UTC based on the National Weather Service's official recorded high temperature for Seattle-Tacoma International Airport. YES wins if the high is between 52-53°F (inclusive); all other outcomes resolve 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.
