Highest temperature in Cape Town on July 13?

Platform comparison

Market context

Cape Town is experiencing fair afternoon conditions with fog expected later, and current readings show a maximum of 16°C for 13 July, aligning with the season’s typical coolness [2][9]. The crowd-implied 0% probability for any significant heat spike reflects this immediate reality, as the day has already progressed past its thermal peak with temperatures hovering near the monthly average of 17°C [3].

Historically, July in Cape Town International Airport rarely exceeds 20°C, with daytime highs typically ranging between 11°C and 17°C and night lows dropping to 8°C [3][4]. Even in warmer anomalies, temperatures seldom breach 22°C, making a high-temperature resolution event statistically negligible for this date. The current 0% YES probability is therefore consistent with a decade of comparable cases where mid-July highs remain firmly in the cool-to-mild band.

Traders should monitor the evening fog development and any sudden wind shifts from the north, which could suppress temperatures further [2]. No major weather announcements or scheduled climate events are pending for 13 July, and the settlement relies solely on Wunderground’s recorded maximum for FACT station, which is unlikely to deviate from the 16–17°C range given the fair-to-foggy transition [1][2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

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