Highest temperature in Wellington on July 24?

Platform comparison

Market context

Wellington’s immediate setup is cool, cloudy and breezy, with live readings around 8-10°C and forecasts calling for a daytime maximum near 9-13°C rather than anything close to a summer-style spike.[2][3][4][5] That makes the current 0% YES crowd view understandable: the market resolves on the *highest* temperature at Wellington Intl Airport on 24 July, and the available short-range forecasts do not point to a late-day warm-up large enough to move this far out of the usual mid-winter band.[3][4][9]

For context, July in Wellington is typically a low-teens Celsius month, with forecasts and climate summaries clustering around roughly 11-12°C and frequent rain or unsettled wind.[3][9] On that framing, the market is essentially asking whether the airport can produce an unusual warm outlier relative to a standard winter day; absent a strong northerly surge or sunshine break, temperatures near the forecast range would keep the outcome in the lower bins rather than the upper ones.[3][4][5]

The main things to watch before the settlement window closes are the airport observation itself, any shift in the local wind pattern, and whether cloud cover breaks enough to lift the daytime high above the current forecast band.[3][4][5] Wellington’s forecasts show northerly winds easing through the day, which can matter because a stronger-than-expected northerly flow is one of the few setups that can briefly lift temperatures in the city; by contrast, the latest observations still show cool air, humidity and generally unsettled conditions.[2][4][5]

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

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.

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 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.