Highest temperature in Wellington on July 6?

Platform comparison

Market context

The underlying real-world event is whether Wellington International Airport will record a maximum temperature of 13°C on 6 July 2026, a threshold the current crowd-implied probability of 0% suggests is virtually impossible. On Polymarket, this contract trades as a near-zero USDC bet on the Polygon network, where conditional tokens reflect the market’s conviction that the day will be significantly cooler. Historical data frames this starkly: July in Wellington typically sees daily highs between 49°F and 56°F (49°–56°C), rarely exceeding 74°F, with average highs around 68°F (20°C). Comparable cases, such as the 11°C–12°C cap during a cold southerly trough on 2 July, show how weather systems routinely suppress temperatures well below 13°C, reinforcing the 0% pricing.

Traders should monitor the arrival of any cold southerly troughs crossing Cook Strait, which consistently cap maximum temperatures, alongside official forecasts from AccuWeather indicating highs of 49°–56°F for July 2026. A recent announcement from Death Valley National Park about record-breaking July heat in Nevada highlights how extreme regional anomalies can occur, though Wellington’s maritime climate remains insulated from such extremes. The settlement window ends at 12:00:00Z on 6 July, so real-time Wunderground data for the Wellington Intl Airport Station will be the definitive resolution source. No major weather announcements are scheduled, but the dependency on trough timing means the 13°C threshold is unlikely unless an unseasonal warm surge disrupts the typical July pattern.

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 PolyGram. 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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.