Manila's highest daily temperatures in May typically range from 32°C to 35°C, with occasional peaks near 36°C during particularly hot spells. Reaching 37°C is relatively uncommon for this season, which explains the 3% odds currently priced in the market. The Philippine Meteorological Agency tracks daily temperature records, and Manila's weather is influenced by the Southwest Monsoon season transition occurring in mid-May, which can bring afternoon thunderstorms that cool daytime highs. The market participants have priced in historical frequency data: achieving 37°C requires sustained afternoon heat without cloud cover or rain interruption. Current market pricing reflects strong skepticism about this outcome, with traders assigning just a 3% probability. Over the past week, Manila has seen highs in the 33–34°C range with scattered afternoon precipitation. The narrow 2-day window until May 19 resolution means actual weather forecasts from meteorological agencies will become increasingly accurate, and any rain in the forecast would push the YES odds even lower. This market captures the precise-temperature nature of weather prediction, where even small shifts in monsoon patterns or urban heat island effects can determine outcomes.
Deep dive — what moves this market
Manila's meteorological history reveals important patterns about extreme heat events in May. The city sits just above 14°N latitude in a tropical climate zone, where temperatures are influenced by monsoon circulation, urban development, and seasonal atmospheric patterns. The Southwest Monsoon (habagat) typically begins transitioning in mid-May, bringing moisture-laden air that often suppresses daytime maximums through afternoon cloud formation and precipitation. May is actually a transition month in Manila's climate: the hot dry season (March–May) is giving way to the wet season. Historical data from the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) shows that May highs in Metro Manila average 32–34°C, with the absolute maximum rarely exceeding 36°C. Reaching 37°C would represent a significant anomaly—approximately 3°C above the typical May average and a heat threshold that appears only during extreme conditions. What could drive YES? A persistent high-pressure system over the Philippines could suppress monsoon moisture and allow surface temperatures to spike. Urban heat island effects in Metro Manila (the world's most densely populated metropolitan area) could amplify readings, particularly if measurement stations are in built-up areas. El Niño conditions, though not currently expected, could elevate baseline temperatures. A delayed monsoon onset or a temporary monsoon break could create a window of intense solar heating. What drives NO? The imminent monsoon transition is the primary headwind. By May 19, cloud cover and afternoon thunderstorms typical of early wet season should be frequent, capping daytime highs. The 3% market odds indicate that traders see 37°C as distinctly improbable. Meteorological forecasting skill has improved substantially; PAGASA's 5-day forecasts are reasonably reliable, and any hint of approaching rain in official forecasts would push the market toward NO. This market exemplifies the precision-prediction paradigm: achieving a specific temperature threshold (not a broad range, but exactly 37°C or higher as the daily maximum) is considerably more difficult than betting on broader temperature bands. The 3% odds properly weight the rarity of such an outcome during a monsoon-transition period in a city where sustained extreme heat is less common than in inland regions. Traders are pricing in decades of meteorological history and the deterministic nature of atmospheric physics in the tropics.
What traders watch for
PAGASA 7-day forecast May 16–19: any afternoon rain or cloud forecast significantly reduces YES probability.
Satellite convection imagery May 18–19: persistent clear skies and sunshine remain critical for 37°C outcome.
Recent Manila highs May 10–17: track daily maxima trend; 33–35°C range suggests heat spike unlikely.
Official PAGASA May 19 reading: uses standard meteorological station method; resolves market via government data.
How does this market resolve?
Resolves YES if the Philippine Meteorological Agency (PAGASA) reports Manila's daily maximum temperature on May 19, 2026 reaches or exceeds 37°C. Resolves NO if the highest temperature is below 37°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.
