Pronóstico: Highest temperature in Sao Paulo on July 23?

Platform comparison

Market context

Polymarket has this contract pricing **0% YES** today, which means the market is treating a very hot reading at São Paulo–Guarulhos International Airport as effectively absent from the current price, even though the settlement is tied to the day’s *highest* temperature rather than the morning or evening snapshot. The event resolves against Wunderground’s daily history for SBGR, so traders are really buying exposure to the maximum printed value at the airport station in Celsius, with cash-settlement mechanics handled through USDC on Polygon and conditional tokens rather than any direct bet on the weather itself.

For context, São Paulo’s July climate is usually mild by tropical standards. BBC Weather shows São Paulo at about **21°C** with steady pressure and a south-south-westerly breeze, while July climatology compiled by Wanderlog puts the typical daily high around **23°C** and the low around **12°C**. That makes a substantially hotter-than-normal airport reading possible, but not the base case, which helps explain why the market can sit near zero for a high-end outcome unless traders expect an unusual warm spell or localised heating at the airport station.[1][2]

What matters now is whether today’s synoptic setup supports a higher afternoon peak at Guarulhos: cloud cover, wind direction, and any arriving cold front will usually matter more than the dawn temperature. For a Polymarket user, the key practical check is the Wunderground station page as the day develops, because the contract settles on the recorded daily maximum, not forecast guidance. If later updates show a hotter midday or afternoon spike at SBGR, the implied probability can move quickly even if the broader São Paulo forecast stays ordinary.[1][2]

Sources: 1 · 2

Methodology

This page reviews Pronóstico: Highest temperature in Sao Paulo on July 23? 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 Qué Es, 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.

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 Polymarket Qué Es 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.