Highest temperature in Cape Town on August 3?

Platform comparison

Market context

Cape Town International Airport’s highest temperature on 3 August 2026 is a winter weather line, and the market’s **0% YES** crowd price leaves the **NO** side as the clear favourite. The settlement source is the day’s maximum at the airport station, so the key question is not whether Cape Town can warm up in August — it can — but whether it can get hot enough to land in the selected range. Typical August highs in Cape Town cluster around **16-18°C**, with forecast summaries for August 2026 showing daily highs mostly in the **mid-to-upper teens Celsius** and average highs around **17°C** to **18°C**.[1][3][10][12][15]

That makes the consensus look aligned with a modest, cool-winter outcome rather than a spike. Comparable August climate guides consistently describe the month as the end of winter, with cool nights, occasional rain, and only occasional warm spells into the low 20s°C, which supports the market’s short-priced favourite unless a brief warm north-westerly or a strong sunbreak pushes the day above normal.[4][6][17] For a contrarian angle, traders would need to believe in a rarer warm day that breaks above the usual Cape winter band; the value question is therefore whether the range map is tight enough to overstate how hard it is for the airport to print a higher-than-average maximum.[7][9]

The main catalysts are meteorological rather than calendar-driven: the live Cape Town International Airport observation feed, the day’s developing cloud cover, wind direction, and any frontal rain bands moving through the Western Cape before the settlement cutoff. August is still a rainy season month in Cape Town, and multiple climate sources flag rainfall, cloud, and wind as recurring features, which all cap intraday highs and favour the underdog on extreme heat ranges.[6][10][15][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Cape Town on August 3? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 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.