Houston's weather on May 19 can be measured precisely using official National Weather Service data, making this market directly and objectively resolvable. The 1% YES odds reflect the extreme specificity required—the highest temperature must fall within exactly one degree (74-75°F), a narrow band considerably unlikely given typical May weather patterns in Houston. Historically, Houston in mid-May experiences high temperatures ranging from 82-92°F, making a high of 74-75°F an outlier scenario that would require an unusual cold snap, unexpected weather system, or rare meteorological event. The current forecast trajectory suggests typical late-spring warmth and humidity rather than the cool conditions this market would require. With less than two days until expiration, traders have priced this outcome at near-zero probability, reflecting both the historical rarity of such cool temperatures in May and the mathematical improbability of hitting such a precise narrow range.
Deep dive — what moves this market
Houston's climate in May represents a transition from spring into early summer, characterized by atmospheric patterns increasingly dominated by warm air masses pushing northward from the Gulf of Mexico. Average high temperatures for mid-May in Houston typically range from 82-88°F, with many days routinely exceeding 90°F as the region enters its warm season proper. The dominant atmospheric dynamics include consistent warm Gulf air masses, increasing solar radiation angles, and humidity levels that typically exceed 70-80%. For the highest temperature to register between 74-75°F would represent a substantial and unusual departure from established seasonal norms. The primary atmospheric scenarios capable of producing such cool conditions would involve either an unusual late-season cold frontal passage from the north, bringing cooler Canadian continental air across Texas, or an atypical weather system configuration that blocks warm air from reaching the region. Such events do occur in May but are statistically rare—perhaps 5-10% of May days in Houston experience highs below 78°F, making anything in the 74-75°F range considerably rarer. Cloud cover and precipitation from a significant passing low-pressure system could reduce daytime solar heating, but by mid-May the jet stream has typically shifted northward, making traditional spring-style cold fronts less likely than during earlier months. Conversely, the overwhelming baseline scenario favoring warmer temperatures stems from Houston's geographic position in the Gulf region and May's seasonal positioning. The Gulf of Mexico provides an essentially unlimited moisture source and powerful heat engine continuously driving warm air northward. Solar declination in mid-May approaches its maximum, providing intense and near-vertical solar heating across the region. Typical afternoon highs exceed 80°F regularly, with 85-90°F being commonplace. The 1% market odds reflect both the documented statistical rarity of cool May temperatures in Houston and the mathematical precision required—hitting exactly the 74-75°F range is substantially more difficult than simply experiencing a cool day.
What traders watch for
National Weather Service official high temperature for Houston on May 19 is the sole resolution criterion
Forecast models and short-range trends through May 19; watch for unexpected cooling systems or weather pattern shifts
Jet stream positioning relative to Gulf region; strong northern placement favors typical warm May weather
Late cold front passage May 18-19; would be unusual but represents only viable path to YES outcome
How does this market resolve?
Resolves YES if the highest temperature recorded at the National Weather Service Houston area station on May 19, 2026 falls within the range of 74-75°F (inclusive). All other temperature readings 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.
