Highest temperature in Buenos Aires on July 18?

Platform comparison

Market context

On 18 July 2026, the highest temperature recorded at Minister Pistarini International Airport in Buenos Aires will fall within one of several defined ranges. The settlement hinges on data from Wunderground's historical weather records for that specific date and station, with the market currently showing 0% implied probability across all temperature bands—an unusual state suggesting either extreme uncertainty or a data lag in crowd pricing.

Buenos Aires experiences mid-winter conditions in July, with average highs around 13–15°C and lows near 8°C. Historical records from the airport station show occasional warm spells during winter months, but sustained temperatures above 20°C are uncommon. The 0% crowd probability across all ranges is anomalous and likely reflects the market's early stage rather than genuine consensus that no temperature will be recorded. Comparable winter days at the same station typically settle in the 10–18°C band, making moderate temperature ranges the natural focal point for value-hunting traders.

The Southern Hemisphere winter pattern through mid-July will be the primary driver. Traders should monitor weather forecasts from the Argentine Meteorological Service (Servicio Meteorológico Nacional) in the weeks preceding settlement, particularly any unusual high-pressure systems or warm air masses moving into the region. Coastal influences on Buenos Aires' microclimate can produce unexpected variance; the Río de la Plata's thermal effects occasionally moderate temperatures upward during winter. Current crowd pricing suggests significant opportunity once initial probability estimates populate the market.

Methodology

This page reviews Highest temperature in Buenos Aires on July 18? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.