Highest temperature in Sao Paulo on July 6?

Platform comparison

Market context

The underlying event is the daily maximum temperature recorded at São Paulo-Guarulhos International Airport on 6 July 2026, measured in degrees Celsius and resolved via Wunderground data. Climatologically, early July represents São Paulo’s coldest period, with average highs hovering around 21–22°C, making a 0% implied probability for any outcome above this range consistent with historical norms. Recent records show Brazil’s absolute peak reached 44.8°C during an extreme heatwave, yet such anomalies are rare and typically confined to other regions like Rio de Janeiro, where heat indices have soared to 62.3°C. For São Paulo specifically, July 2023 was the hottest July in 174 years, averaging 16.92°C, reinforcing that even record-breaking years rarely deviate far from the 21–22°C baseline.

A power-user evaluating this market programmatically would focus on short-term model guidance and real-time sensor feeds rather than long-term climate trends. The current crowd-implied probability of 0% suggests the market expects temperatures to remain within the narrow 24–25°C band, which aligns with the latest official forecasts. Traders should monitor announcements from Brazil’s National Meteorology Institute (INMET) for any sudden shifts in weather patterns, as well as Wunderground’s hourly updates for the SBGR station. Recent news from Al Jazeera highlights unprecedented heat activity across Brazil, but this has not yet translated to extreme highs in São Paulo. Conditional orders based on real-time data streams would be the most effective approach, allowing traders to react instantly to deviations from the expected 24–25°C range. Settlement occurs once the first datapoint for 7 July is published, ensuring no post-resolution revisions affect the outcome.

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Methodology

This page reviews 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 Kalshi Fees, 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 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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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