Highest temperature in Wellington on August 3?

Platform comparison

Market context

Wellington is starting the morning cool, with airport observations around 10°C and recent forecasts clustering the early hours in the low-to-mid single digits before only a modest lift later in the day.[3][6][16] That matters for this market because the day’s resolution is the *highest* temperature reached at Wellington Intl Airport, so an early-morning chill can still leave room for a middling daytime peak rather than an extreme print.[3][6]

The current 0% YES price fits Wellington’s August climatology: monthly averages cluster around 11–12°C highs, and several sources put today’s likely high in roughly that band rather than anywhere near a summer-style spike.[4][7][10][12] In a city that is often windy, cool and changeable, the market usually hinges less on the morning low than on whether sunshine, lighter winds, or a brief clearing lets the airport climb a degree or two above forecast.[13][16][20]

The main catalysts to watch are the next forecast updates and any change in wind direction or cloud cover, because Wellington’s temperature at the airport can move quickly with onshore flow, showers, or a stronger southerly.[3][13][16] MetService notes that forecasts and warnings may be updated at any time, and its latest Wellington read-out still shows a cool start and only limited warming, while BBC and other live feeds point to a generally mild but unsettled setup rather than a heat event.[3][16][20]

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.

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.

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.