Highest temperature in Buenos Aires on May 22?

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Market context

Buenos Aires is heading into the 22 May temperature check with the market priced as a heavy underdog: 0% YES implies the consensus is firmly in the lowest bracket, and the value, if any, lies in a mild-morning surprise rather than a genuine warm spell. For the Minister Pistarini Intl Airport Station, late May is normally cool rather than cold, but still well below anything that would threaten the higher bands; typical May highs in Buenos Aires ease from the upper teens Celsius towards the low teens, and comparable climate summaries put daily highs around 16–19°C, with the month trending cooler into the final week. That makes any outcome above the mid-teens less likely than the market framing suggests, while a single cooler southerly surge would keep the favourite in place.

The recent weather pattern is the key catalyst. Wunderground’s final daily high will depend on the day’s actual reading at Ezeiza, so traders should watch for overnight rain, cloud cover and wind direction changes rather than headlines about city-wide conditions. Late-autumn fronts in the Río de la Plata region can knock temperatures down quickly, while clear, light-wind mornings can let the airport station warm faster after sunrise. AccuWeather’s May outlook for Buenos Aires points to average highs around 60°F to 65°F, which is roughly 16°C to 18°C, consistent with a market that is anchored against modest rather than extreme heat. On that basis, the consensus sits in the lower ranges, and the contrarian angle is only whether the day briefly reaches a slightly warmer band before the midday settlement window closes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Buenos Aires on May 22? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.