Highest temperature in Sao Paulo on August 7?

Platform comparison

Market context

São Paulo’s airport temperature on 7 August is being priced as an extreme under, with the crowd effectively assigning **0%** to any Yes outcome. That sits below the broad August norm: AccuWeather’s monthly outlook puts São Paulo’s daily highs around the low-to-mid 20s Celsius, while Weather2Travel describes August daytime maxima near **23°C** on long-run averages, so a very hot reading would already be outside the usual winter profile.[3][6] The live local forecast is not especially bullish for heat either, with Brazilian and international sources pointing to highs around **25–27°C** for the city, alongside cloud and showers later in the day.[1][12][13]

Comparable cases suggest traders should read this contract as an airport-station temperature question, not a city-wide headline forecast. The settlement source is the Weather Underground daily observations table for São Paulo-Guarulhos International Airport, and that matters because airport readings can differ from broader municipal forecasts, especially with wind, cloud cover and timing around the afternoon maximum.[10] Recent observations at nearby airport stations have been in the low 20s Celsius with no major heat signal, which makes a top-end outcome harder to justify unless the early afternoon spikes well above city forecasts.[2][10]

For catalysts, the key watchpoint is the timing of any late-day warming before showers and thunderstorms move in, since multiple forecasts flag instability and rain from the afternoon into the night.[2][12][13] That setup usually caps the ceiling rather than extending it, so the main cross-platform divergence is between a near-certain No in the market, moderate weather-book style forecasts clustered in the mid-20s Celsius, and the more cautious analyst view implied by the airport-specific resolution rule.[1][10][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Sao Paulo on August 7? 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 Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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.