Pronóstico: Highest temperature in Sao Paulo on July 6?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at São Paulo-Guarulhos International Airport on 6 July 2026, measured in degrees Celsius. Polymarket prices this contract today with a 0% implied probability for the YES outcome, reflecting the market’s view that the temperature will not exceed the specified threshold. On-chain, traders use USDC on the Polygon network to buy conditional tokens, where settlement hinges on Wunderground’s official daily high for SBGR.

Historically, July is São Paulo’s coldest month, with average highs near 22°C (72°F) and lows around 13°C (56°F), making extreme heat unlikely in this season [3]. While Brazil recorded a national peak of 44.8°C in a recent heatwave, that event occurred outside São Paulo and during a different season [1]. São Paulo’s own record high is 37.7°C, set in September 2023, further underscoring that July typically lacks the thermal intensity needed to breach higher brackets [7].

Traders should monitor the Brazilian National Meteorology Institute’s (INMET) weekly forecasts and any sudden shifts in regional wind patterns, which can influence airport temperatures. A recent BBC report noted that July 2023 was the hottest July in 174 years, suggesting that anomalous warmth could recur if climate patterns align [6]. However, with no current heatwave alerts for São Paulo and stable seasonal averages, the catalysts for a breakout remain weak, reinforcing the 0% market pricing.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Sao Paulo on July 6? 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 Polymarket Argentina, 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

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.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.