This market evaluates whether Los Angeles' highest temperature will settle in the unusually narrow 60-61°F range on May 18, 2026. At 2% YES odds, traders assign this outcome extremely low probability, reflecting the rarity of such cool conditions during mid-May in Southern California. Historically, Los Angeles averages high temperatures in the low-to-mid 70s throughout May, with above-average years seeing highs push into the 80s. A high of only 60-61°F would represent a notably cool day for the season, typically associated with unseasonable marine layer influence, coastal storms, or cold upper-level patterns pushing south. The specificity of this temperature band—just two degrees—makes the market's narrow focus more challenging than a broader range prediction. Current pricing reflects market consensus that standard seasonal warming will dominate, pushing highs well above this range. This market resolves based on the official National Weather Service recording from Los Angeles International Airport (LAX), the standard reference station.
Deep dive — what moves this market
Los Angeles in mid-May typically experiences predictable warming patterns as the Northern Hemisphere enters late spring. The city's coastal location moderates temperature extremes—ocean waters remain cool, providing a natural brake on overheating—but generally sunny conditions and warming inland air masses push May highs consistently into the 70s and 80s. The specific range of 60-61°F is exceptionally cool for this time of year and would represent a significant departure from normal seasonal conditions. Such a low high temperature would require substantial atmospheric disruption: either a strong marine layer event (coastal stratus clouds) that prevents inland heating, a deep upper-level trough directing cold Canadian air southward, or an active weather system bringing moisture and cooler air directly off the Pacific Ocean. Historical analog events provide crucial context. Los Angeles has experienced May days with highs in the 60s, but these typically occur during unusual transitional weather patterns, late-season frontal passages, or brief cold air incursions from the northwest. The combination of rarity and specificity—traders must predict not just a cooler day but an extremely narrow two-degree band—explains the 2% market odds. The statistical burden is severe: missing the range by even one degree resolves the market to NO. The market's spread reflects high conviction among traders that normal seasonal patterns will prevail through May 18. A 2% probability assignment suggests fewer than 1-in-50 traders believe this outcome will materialize. This pricing discipline is appropriate: typical May weather in Los Angeles features abundant sunshine, light winds, and predictable diurnal warming cycles. Recent years' May data show increasing atmospheric variability from transient Pacific weather systems, yet the baseline remains consistently warm. The National Weather Service forecast will be critical. Clear skies and typical subtropical high pressure patterns would likely compress YES odds further. Conversely, any meteorological hint of persistent marine layer, upper-level disturbances, or active low-pressure systems could attract contrarian traders.
What traders watch for
May 18 NWS forecast release: monitor for marine layer, upper-level troughs, or Pacific storm systems.
Temperature precision critical: any high of 62°F or 59°F resolves market to NO despite closeness.
Upper-level atmospheric pattern: watch for mid-latitude trough potentially directing cool air southward.
Marine layer persistence: coastal stratus clouds extending inland could suppress typical May heating.
How does this market resolve?
The market resolves based on the National Weather Service's official high temperature recording for Los Angeles (LAX) on May 18, 2026. Resolution is YES if the recorded high falls between 60°F and 61°F inclusive; NO otherwise.
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.
